The fluorescent reaction of salicylaldehyde salicyloylhydrazone(SASH) with indium(Ⅲ) was studied in detail. Based on this chelation reaction, a sensitive spectrofluorimetric method was developed for the determination...The fluorescent reaction of salicylaldehyde salicyloylhydrazone(SASH) with indium(Ⅲ) was studied in detail. Based on this chelation reaction, a sensitive spectrofluorimetric method was developed for the determination of indium in a water ethanol(volume ratio 3∶7) medium at pH 4 0. Under the condition, the In SASH complex displays an excitation and emission maxima at 396 and 461 nm, respectively. The linear range of the method is from 4 7 to 1000 ng/mL and the detection limit is 0 94 ng/mL. The molar ratio of indium to the reagent is 1∶1. The interferences of other ions were studied. The method was successfully applied to the determination of indium in the chemical reagents of lead, tin, zinc, zinc chloride and geological samples by standard addition method.展开更多
The fluorescent reagent salicylaldehyde benzoylhydrazone(SABH) was synthesized and its ionization constants were estimated spectrophotometrically. The fluorescent reaction of this reagent with gallium was st...The fluorescent reagent salicylaldehyde benzoylhydrazone(SABH) was synthesized and its ionization constants were estimated spectrophotometrically. The fluorescent reaction of this reagent with gallium was studied. Based on this chelation reaction, a spectrofluorimetric method was developed for the determination of gallium in a water medium at pH 3.2. Under these conditions, the Ga SABH complex has excitation and emission maxima at 372 and 455 nm, respectively. The linear range of the method was 0~150 μg/L and the detection limit was 0.36 μg/L of gallium when a standard addition method was used in the assay. The molar ratio of gallium to the reagent was 1∶3. The interference of other ions was studied. The extraction with n butyl acetate from a 6 mol/L hydrochloric acid medium was used to separate Ga from the interfering elements in semiconductor silicon and geological samples, and themethod has been successfully applied to the determination of gallium in these samples.展开更多
A complex of terbium(Ⅲ) with Schiff base salicylaldehyde-taurine and 1,10-phenanthroline was synthesized. The molecular formula was [Tb (sal-taurine) (1,10-phen) (NO_3)]·2H_2O (sal=salicylaldehyde, 1,10-phen=1,1...A complex of terbium(Ⅲ) with Schiff base salicylaldehyde-taurine and 1,10-phenanthroline was synthesized. The molecular formula was [Tb (sal-taurine) (1,10-phen) (NO_3)]·2H_2O (sal=salicylaldehyde, 1,10-phen=1,10-phenanthroline). The composition of the title complex was determined by elemental analysis and EDTA volumetic analysis. IR, Molar conductivity and X-ray powder diffraction were performed for its characterizations. The thermal decomposition kinetics of the complex were investigated under non-isothermal condition using the Achar differential method and the Coats-Redfern integral method. The kinetic equation for the second step corresponds to the mechanisms of the Zhuralev, Lesokin and Templman equation were obtained.展开更多
The binuclear Schiff base complexes prepared by condensation 2,6-diamino-pyridine and salicylaldehyde (LH) by using microwave and adding metal salts to ligand by same ratio. The Schiff base ligand was checked by infra...The binuclear Schiff base complexes prepared by condensation 2,6-diamino-pyridine and salicylaldehyde (LH) by using microwave and adding metal salts to ligand by same ratio. The Schiff base ligand was checked by infrared, electronic spectra and 1HNMR spectroscopy and prepared complexes characterized by molar conductivity, infrared, electronic spectra and susceptibility measurements. The values of molar conductivities reveal that the complexes are non-electrolytes, from obtained data of electronic spectra and magnetic moment, an octahedral geometry was suggested, coordinated to the metal ions in a manner with N donor sites of imine groups, and oxygen of phenolic OH group.展开更多
The salicylaldehyde salicylhydrazone and its complex of Er(Ⅲ) were synthesized. The formulae K·4H_2O(HL=[C_(14)H_(10)N_2O_3]^(2-), the bivalent form of the salicylaldehyde salicylhydrazone) were determined by el...The salicylaldehyde salicylhydrazone and its complex of Er(Ⅲ) were synthesized. The formulae K·4H_2O(HL=[C_(14)H_(10)N_2O_3]^(2-), the bivalent form of the salicylaldehyde salicylhydrazone) were determined by elemental analysis and EDTA volumetric analysis. Molar conductance, IR, UV and X-ray power diffraction were carried out for the characterizations of the complex and the ligand. There are two stable five-numbered and six-numbered circles in the complex. The thermal decompositions of the ligand and the complex with the kinetic study are carried out by non-isothermal thermogravimetry. The stages of the decompositions were identified by TG-DTG curve. The non-isothermal kinetic data were analyzed by means of integral and differential methods. The possible reaction mechanism and the kinetic equation were investigated by the corresponding kinetic parameters.The activation energy value of the main step decomposition are also calculated by Kissinger′s method and Ozawa′s method.展开更多
A new electroluminescent material, salicylaldehyde anil zinc (SAZ) was synthesized, which can form high quality, thermal stability, nano-scale amorphous films by vacuum evaporation. Its structure, thermal stability ...A new electroluminescent material, salicylaldehyde anil zinc (SAZ) was synthesized, which can form high quality, thermal stability, nano-scale amorphous films by vacuum evaporation. Its structure, thermal stability were characterized by infrared (IR) spectra, differential thermal analysis-thermogravimetry (DTA-TG) analysis, respectively. The optical properties of SAZ were investigated by UV absorption spectra, Photoluminescence (PL) excitation and emission spectra. The highest occupied molecular orbits (HOMO), lowest unoccupied molecular orbits (LUMO) and optical band gap were evaluated by cyclic voltammetry curve and optical absorption band edge. The electroluminescent devices using SAZ as the emissive layer emit green light with a peak wavelength at 509 nm and a brightness of about 3.1 cd/m^2.展开更多
Eight new macrocyclic complexes were synthesized by template reaction of 1,4-bis(3-aminopropoxy)butane with metal nitrate and 1,3-bis(2-formylphenyl)propane or 1,4-bis(2-formylphenyl)butane and their structures ...Eight new macrocyclic complexes were synthesized by template reaction of 1,4-bis(3-aminopropoxy)butane with metal nitrate and 1,3-bis(2-formylphenyl)propane or 1,4-bis(2-formylphenyl)butane and their structures were proposed on the basis of elemental analysis, FTIR, UV-vis, molar conductivity measurements, ^1H NMR and mass spectra. The metals to ligand molar ratios of the complexes were found to be 1: 1. The complexes are 1:2 electrolytes for Pb(II), Zn(II) and Cd(II) complexes and 1:3 electrolytes for La(III) as shown by their molar conductivities (Am) in DMSO at 10^-3 mol L^-1. Due to the existence of free ions in these complexes, such complexes are electrically conductive. The configurations of La(III) and Pb(II) were proposed to probably octahedral and Zn(II) and Cd(II) complexes were proposed to probably tetrahedral.展开更多
Two novel bis(2-hydroxy-5-R-benzylidene)carbohydrazide dibutyltin complexes(R:Cl(T1),Me(T2))with hexanuclear and triangular frame structures were obtained by microwave-assisted solvothermal reaction of dibutyltin oxid...Two novel bis(2-hydroxy-5-R-benzylidene)carbohydrazide dibutyltin complexes(R:Cl(T1),Me(T2))with hexanuclear and triangular frame structures were obtained by microwave-assisted solvothermal reaction of dibutyltin oxide precursor with the ligands in methanol environments,However,their structures are characterized by elemental analysis,IR,(1H,13C)NMR spectra,and the molecular structures of T1 and T2 were confirmed by X-ray diffraction.The crystal of T1 belongs to triclinic system,space group P1,and T2 is of monoclinic system,space group C2/c.Five-coordinated distorted triangular bipyramids and six-coordinated distorted octahedral configurations were formed by the coordination of oxygen and nitrogen atoms of ligands with two dibutyltins,respectively,and trimer hexanuclear dibutyltin complexes were constructed by the cross-coordination of enol imines.The two complexes exhibit fluorescence emission in DMF solvents and DMF-water mixtures.When the volume fraction of water content is between 0 and 10%(V/V),the aggregation fluorescence enhancement effect is good,and fluorescence quenching occurs when the water content is more than 10%(V/V).The T1 can inhibit the growth of target plants,such as Portulaca oleracea,Cassia tora L.,Brassica campestris L.ssp.chinensis var.utilis Tsen et Lee and Amaranthus tricolor L.The T2 can selectively inhibit the growth of Portulaca oleracea L.,Amaranthus spinosus L.and Amaranthus tricolor L.It can be used as a candidate herbicide for Portulaca oleracea L.,Amaranthus spinosus L.and Amaranthus tricolor L.展开更多
An efficient synthesis of substituted 1,3-dihydroisobenzofurans is developed. In this novel route, oaroylbenzaldehydes, as key intermediates, can be obtained by lead tetraacetate oxidation of Naroylhydrazones of salic...An efficient synthesis of substituted 1,3-dihydroisobenzofurans is developed. In this novel route, oaroylbenzaldehydes, as key intermediates, can be obtained by lead tetraacetate oxidation of Naroylhydrazones of salicylaldehydes. The mild and general strategy enables the synthesis of various substituted 1,3-dihydroisobenzofurans in high yields. Moreover, this method can be applied to efficiently synthesize escitalopram.展开更多
Botrytis cinerea is a necrotrophic fungusth at a ffects various plant species.Chemical control is an ecessity and as much as possible,eco-friendly conditions and bioresources to obtain these chemicals should be used.I...Botrytis cinerea is a necrotrophic fungusth at a ffects various plant species.Chemical control is an ecessity and as much as possible,eco-friendly conditions and bioresources to obtain these chemicals should be used.In this context,a series of products w as obtained from salicylaldehyde using zinc as a powerful reagent and tested for antifungal activity against Botrytis cinerea.展开更多
Three salicylaldehyde Schiff base(SSB), iso-PBP, PBP and EPB, were facilely synthesized and exhibited aggregation-induced emission. The introduction of C= N-N = C moiety in these SSB dyes largely extend the conjugat...Three salicylaldehyde Schiff base(SSB), iso-PBP, PBP and EPB, were facilely synthesized and exhibited aggregation-induced emission. The introduction of C= N-N = C moiety in these SSB dyes largely extend the conjugation system and push their emission to yellow to red spectral region. These SSB dyes were negligibly fluorescent in dilute THF solution. In THF/water mixtures with high water fractions, they displayed strong yellow to red fluorescence(up to 617nm) and large Stokes shifts(up to 152 nm). Single crystal analysis on EBP showed the longer emission of in aggregated state was attributed to the molecular packing effect as compared with that in dilute solution. The bio-imaging application indicated EBP could specifically accumulate in lipid droplets in living cells.展开更多
A novel Schiff-base fluorescent probe 6,6'-((1E,1'E)-(ethane-1,2-diylbis(azaneylylidene))bis-(methaneylylidene))bis(3-(diethylamino)phenol)(L)was derived from the 2:1 M condensation of 4-(diethylamino)-2-hydro...A novel Schiff-base fluorescent probe 6,6'-((1E,1'E)-(ethane-1,2-diylbis(azaneylylidene))bis-(methaneylylidene))bis(3-(diethylamino)phenol)(L)was derived from the 2:1 M condensation of 4-(diethylamino)-2-hydroxybenzaldehyde with ethylenediamine and characterized by ^(1)H NMR,^(13)C NMR and FT-IR spectroscopies.The results of spectral analysis showed that the probe L is selective and sensitive to Cu^(2+).The detection limit of L is found to be 19 nmol·L^(-1).There is a good linear relationship between the fluorescence intensity of probe L and the concentration of Cu^(2+)in the range of 0 to 20μmol×L^(-1).X-ray crystal structure of the L-Cu^(2+)complex and the Job plot revealed a 1:1 L-Cu^(2+)identification.展开更多
A series of dibutyltin complexes,(Bu_(2)Sn)_(2)L,[(Bu_(2)Sn)_(2)L]3 and H_(2)LSnBu_(2),were synthesized by microwave-assisted methanolic solvothermal method,where H4L is[_(2)-(OH)-R-ArCH=NNH]_(2)CX,and X=O,R=4-NEt_(2)...A series of dibutyltin complexes,(Bu_(2)Sn)_(2)L,[(Bu_(2)Sn)_(2)L]3 and H_(2)LSnBu_(2),were synthesized by microwave-assisted methanolic solvothermal method,where H4L is[_(2)-(OH)-R-ArCH=NNH]_(2)CX,and X=O,R=4-NEt_(2)(Tl),5-Br(T_(2));X=S,R=H(T3);R=5-Br(T4).Their structures were characterized by elemental analysis,IR and(^(1)H,^(13)C)-NMR spectra.The molecular structure of T_(2) was confirmed by X-ray diffraction.The crystal of T_(2) belongs to monoclinic system,space group la.Five-coordinated distorted triangular bipyramids and six-coordinated distorted octahedral configurations were formed by the coordination of oxygen and nitrogen atoms of ligand with two dibutyltins,thus forming a trimeric hexanuclear butyltin complex by the cross coordination of three units(Bu_(2)Sn)_(2)L with enol imines.The T_(2) and T4 exhibit fluorescence emission in DMF solvents and DMF-water mixture.The fluorescence intensity of T_(2)-DMF-H_(2)0 system decreases almost linearly with the increase of water volume fraction(WVF).The aggregation fluorescence enhancement effect of T4-DMF-H_(2)0 solution system increases with the increase of WVF at the range of 0-_(2)0%WVF.When WVF is more than _(2)0%,the fluorescence intensity decreases with the increase of WVF.In addition,T1〜T4 have broad growth activities on target plants,such as Portulaca oleracea L.,Amaranthus spinosus L.,Cassia tora L.,Brassica campestris L.ssp.chinensis var.utilis Tsen et Lee,and Amaranthus tricolor L.,and can be used as a candidate herbicide for further research.展开更多
The title complex [Cu3L3(H2O)]DMFH2O (H2L = 4-(3-hydroxy-2-ethyl-4- pyridinone-1-yl)-aniline condensation salicylaldehyde) was obtained. The single-crystal X-ray study shows that it is a trinuclear compound [Cu3(C20H1...The title complex [Cu3L3(H2O)]DMFH2O (H2L = 4-(3-hydroxy-2-ethyl-4- pyridinone-1-yl)-aniline condensation salicylaldehyde) was obtained. The single-crystal X-ray study shows that it is a trinuclear compound [Cu3(C20H15N2O3)3(H2O)]DMFH2O. The coordi- nation sphere about each copper ion in the complex consists of two oxygen atoms from hydroxylpyridinone moiety of one ligand and one oxygen and one nitrogen atoms from salicyladehyde Schiff-base moiety of another ligand arranged in a slightly distorted square planar geometry. Among the three copper ions, one (Cu(2)) is coordinated by the other oxygen atom of water molecule on the fifth coordinate position to form a distorted square pyramid geometry. The crystal is of monoclinic, space group P21/c with a = 12.9202(5), b = 27.197(1), c = 17.0116(7) ? b = 100.588(1), V = 5875.9(4) 3, Z = 4, C63H57N7O12Cu3, Mr = 1294.78, Dc = 1.464 g/cm3, m = 1.146 mm-1, F(000) = 2668, R = 0.0784 and wR = 0.1546 for 6926 observed reflections with I > 2s(I). The differences of coordinate bond lengths are observed between anhydrous and hydrous units: in the former unit, the average bond lengths are 1.978 ?for CuN (azomethine), 1.883 ?for CuO (phenolic) in Schiff-base moiety, 1.959 ?for CuO (keto), and 1.919 ?for CuO (hydroxy) in hydroxypyridinone moiety; while those in the latter are longer with the following corresponding values: 1.985(5), 1.908(5), 1.993(5) and 1.919(4) ? respectively. The Cu(2)O (water) bond length is 2.375(6) ?展开更多
The Ni(Ⅱ) complex with ligand 2-N-(2-hydroxy-benzylidene) furanmethanoamine has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. It crystallizes in the monoclinic...The Ni(Ⅱ) complex with ligand 2-N-(2-hydroxy-benzylidene) furanmethanoamine has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group C2/c with a = 2.0280(4), b =0.57700(12), c = 1.7340(4) nm, β = 94.74(3)°, Z = 4, Dc = 1.508 g/cm^3, the final R = 0.0434 and wR = 0.1112 for 1843 observed reflections with 1 〉 2σ(I). X-ray analysis revealed that the Ni(Ⅱ) ion is coordinated by two nitrogen atoms of Schiff base and two oxygen atoms of salicylaldehyde in the equatorial plane, and the coordination geometry can be described as a square.展开更多
A new dinuclear copper(II) complex ([Cu(C12H17N2O)(N3)]2, C24H34Cu2N10O2) has been synthesized and characterized by X-ray structure determination. It crystallizes in the monoclinic system, space group P21/c with a =...A new dinuclear copper(II) complex ([Cu(C12H17N2O)(N3)]2, C24H34Cu2N10O2) has been synthesized and characterized by X-ray structure determination. It crystallizes in the monoclinic system, space group P21/c with a = 18.529(4), b = 10.933(2), c = 14.534(3) ?, β = 111.07(3)°, V = 2748(1) ?3, Z = 4, Mr = 621.69, F(000) = 1288, Dc = 1.503 g/cm3 and μ(MoKα) = 1.590 mm?1. The structure was refined to R = 0.0647 and wR = 0.1846 for 4406 observed reflections (I > 2σ(I)). The asymmetric unit comprises two halfmolecules. The complex is a centrosymmetric dimmer in which the copper atoms are penta-coordinated by three coordination atoms from the corresponding tridentate Schiff base ligand and two bridging azide anions. The Cu(II)…Cu(II) average distance is 3.350(1) ?.展开更多
文摘The fluorescent reaction of salicylaldehyde salicyloylhydrazone(SASH) with indium(Ⅲ) was studied in detail. Based on this chelation reaction, a sensitive spectrofluorimetric method was developed for the determination of indium in a water ethanol(volume ratio 3∶7) medium at pH 4 0. Under the condition, the In SASH complex displays an excitation and emission maxima at 396 and 461 nm, respectively. The linear range of the method is from 4 7 to 1000 ng/mL and the detection limit is 0 94 ng/mL. The molar ratio of indium to the reagent is 1∶1. The interferences of other ions were studied. The method was successfully applied to the determination of indium in the chemical reagents of lead, tin, zinc, zinc chloride and geological samples by standard addition method.
文摘The fluorescent reagent salicylaldehyde benzoylhydrazone(SABH) was synthesized and its ionization constants were estimated spectrophotometrically. The fluorescent reaction of this reagent with gallium was studied. Based on this chelation reaction, a spectrofluorimetric method was developed for the determination of gallium in a water medium at pH 3.2. Under these conditions, the Ga SABH complex has excitation and emission maxima at 372 and 455 nm, respectively. The linear range of the method was 0~150 μg/L and the detection limit was 0.36 μg/L of gallium when a standard addition method was used in the assay. The molar ratio of gallium to the reagent was 1∶3. The interference of other ions was studied. The extraction with n butyl acetate from a 6 mol/L hydrochloric acid medium was used to separate Ga from the interfering elements in semiconductor silicon and geological samples, and themethod has been successfully applied to the determination of gallium in these samples.
文摘A complex of terbium(Ⅲ) with Schiff base salicylaldehyde-taurine and 1,10-phenanthroline was synthesized. The molecular formula was [Tb (sal-taurine) (1,10-phen) (NO_3)]·2H_2O (sal=salicylaldehyde, 1,10-phen=1,10-phenanthroline). The composition of the title complex was determined by elemental analysis and EDTA volumetic analysis. IR, Molar conductivity and X-ray powder diffraction were performed for its characterizations. The thermal decomposition kinetics of the complex were investigated under non-isothermal condition using the Achar differential method and the Coats-Redfern integral method. The kinetic equation for the second step corresponds to the mechanisms of the Zhuralev, Lesokin and Templman equation were obtained.
文摘The binuclear Schiff base complexes prepared by condensation 2,6-diamino-pyridine and salicylaldehyde (LH) by using microwave and adding metal salts to ligand by same ratio. The Schiff base ligand was checked by infrared, electronic spectra and 1HNMR spectroscopy and prepared complexes characterized by molar conductivity, infrared, electronic spectra and susceptibility measurements. The values of molar conductivities reveal that the complexes are non-electrolytes, from obtained data of electronic spectra and magnetic moment, an octahedral geometry was suggested, coordinated to the metal ions in a manner with N donor sites of imine groups, and oxygen of phenolic OH group.
文摘The salicylaldehyde salicylhydrazone and its complex of Er(Ⅲ) were synthesized. The formulae K·4H_2O(HL=[C_(14)H_(10)N_2O_3]^(2-), the bivalent form of the salicylaldehyde salicylhydrazone) were determined by elemental analysis and EDTA volumetric analysis. Molar conductance, IR, UV and X-ray power diffraction were carried out for the characterizations of the complex and the ligand. There are two stable five-numbered and six-numbered circles in the complex. The thermal decompositions of the ligand and the complex with the kinetic study are carried out by non-isothermal thermogravimetry. The stages of the decompositions were identified by TG-DTG curve. The non-isothermal kinetic data were analyzed by means of integral and differential methods. The possible reaction mechanism and the kinetic equation were investigated by the corresponding kinetic parameters.The activation energy value of the main step decomposition are also calculated by Kissinger′s method and Ozawa′s method.
基金This work was supported by the National Excellent Youth Foundation of China(50025103)the National Natural Science Foundation of China(20271037 and 90306014)+1 种基金the Shanxi Province Natural Science Foundation(20041066)the Shanxi Province Scientific Research Foundation of the Scholars Returned from Abroad.(200523)
文摘A new electroluminescent material, salicylaldehyde anil zinc (SAZ) was synthesized, which can form high quality, thermal stability, nano-scale amorphous films by vacuum evaporation. Its structure, thermal stability were characterized by infrared (IR) spectra, differential thermal analysis-thermogravimetry (DTA-TG) analysis, respectively. The optical properties of SAZ were investigated by UV absorption spectra, Photoluminescence (PL) excitation and emission spectra. The highest occupied molecular orbits (HOMO), lowest unoccupied molecular orbits (LUMO) and optical band gap were evaluated by cyclic voltammetry curve and optical absorption band edge. The electroluminescent devices using SAZ as the emissive layer emit green light with a peak wavelength at 509 nm and a brightness of about 3.1 cd/m^2.
文摘Eight new macrocyclic complexes were synthesized by template reaction of 1,4-bis(3-aminopropoxy)butane with metal nitrate and 1,3-bis(2-formylphenyl)propane or 1,4-bis(2-formylphenyl)butane and their structures were proposed on the basis of elemental analysis, FTIR, UV-vis, molar conductivity measurements, ^1H NMR and mass spectra. The metals to ligand molar ratios of the complexes were found to be 1: 1. The complexes are 1:2 electrolytes for Pb(II), Zn(II) and Cd(II) complexes and 1:3 electrolytes for La(III) as shown by their molar conductivities (Am) in DMSO at 10^-3 mol L^-1. Due to the existence of free ions in these complexes, such complexes are electrically conductive. The configurations of La(III) and Pb(II) were proposed to probably octahedral and Zn(II) and Cd(II) complexes were proposed to probably tetrahedral.
基金Supported by the Innovation Platform Open Foundation for Colleges and Universities of Hunan Province(No.16k011)the Foundation of Key Laboratory of Functional Metal-organic Compounds of Hunan Province。
文摘Two novel bis(2-hydroxy-5-R-benzylidene)carbohydrazide dibutyltin complexes(R:Cl(T1),Me(T2))with hexanuclear and triangular frame structures were obtained by microwave-assisted solvothermal reaction of dibutyltin oxide precursor with the ligands in methanol environments,However,their structures are characterized by elemental analysis,IR,(1H,13C)NMR spectra,and the molecular structures of T1 and T2 were confirmed by X-ray diffraction.The crystal of T1 belongs to triclinic system,space group P1,and T2 is of monoclinic system,space group C2/c.Five-coordinated distorted triangular bipyramids and six-coordinated distorted octahedral configurations were formed by the coordination of oxygen and nitrogen atoms of ligands with two dibutyltins,respectively,and trimer hexanuclear dibutyltin complexes were constructed by the cross-coordination of enol imines.The two complexes exhibit fluorescence emission in DMF solvents and DMF-water mixtures.When the volume fraction of water content is between 0 and 10%(V/V),the aggregation fluorescence enhancement effect is good,and fluorescence quenching occurs when the water content is more than 10%(V/V).The T1 can inhibit the growth of target plants,such as Portulaca oleracea,Cassia tora L.,Brassica campestris L.ssp.chinensis var.utilis Tsen et Lee and Amaranthus tricolor L.The T2 can selectively inhibit the growth of Portulaca oleracea L.,Amaranthus spinosus L.and Amaranthus tricolor L.It can be used as a candidate herbicide for Portulaca oleracea L.,Amaranthus spinosus L.and Amaranthus tricolor L.
基金supported by the National Basic Research Program of China(No.2011CB933503)Technology Supporting Program of Jiangsu Province(Nos.BE2009639 and BE2012657)
文摘An efficient synthesis of substituted 1,3-dihydroisobenzofurans is developed. In this novel route, oaroylbenzaldehydes, as key intermediates, can be obtained by lead tetraacetate oxidation of Naroylhydrazones of salicylaldehydes. The mild and general strategy enables the synthesis of various substituted 1,3-dihydroisobenzofurans in high yields. Moreover, this method can be applied to efficiently synthesize escitalopram.
基金ESCOM for fundingWallonie-Bruxelles International et le Fonds National de la Recherche Scientifique pour la communaute francaise de BelgiqueMinistere des Affaires Etrangeres et du Developpement International(MAEDI)et Ambassade de France en Belgique pour la France and by the Region of Picardie,France(cofunding of equipment under CPER 2007-2020 project)。
文摘Botrytis cinerea is a necrotrophic fungusth at a ffects various plant species.Chemical control is an ecessity and as much as possible,eco-friendly conditions and bioresources to obtain these chemicals should be used.In this context,a series of products w as obtained from salicylaldehyde using zinc as a powerful reagent and tested for antifungal activity against Botrytis cinerea.
基金supported by the National Natural Science Foundation of China (No. U1608222)the State Key Laboratory of Fine Chemicals (No. KF1606)+2 种基金the State Key Laboratory of Chemo/ Biosensing and Chemometrics (No. 2016005)the Research Grants Council of Hong Kong (Nos. 16308116 and 16305015)the Innovation and Technology Commission (No. ITC-CNERC14SC01)
文摘Three salicylaldehyde Schiff base(SSB), iso-PBP, PBP and EPB, were facilely synthesized and exhibited aggregation-induced emission. The introduction of C= N-N = C moiety in these SSB dyes largely extend the conjugation system and push their emission to yellow to red spectral region. These SSB dyes were negligibly fluorescent in dilute THF solution. In THF/water mixtures with high water fractions, they displayed strong yellow to red fluorescence(up to 617nm) and large Stokes shifts(up to 152 nm). Single crystal analysis on EBP showed the longer emission of in aggregated state was attributed to the molecular packing effect as compared with that in dilute solution. The bio-imaging application indicated EBP could specifically accumulate in lipid droplets in living cells.
基金Financially supported by the Natural Science Foundation of Hunan Province (2021JJ30291)Undergraduate Training Program for Innovation and Entrepreneurship of Hunan Province ([2021]197-3585)+1 种基金Undergraduate Training Program for Innovation and Entrepreneurship of Hunan University of Science and Engineering (2021)the Construct Program of Applied Characteristic Discipline in Hunan University of Science and Engineering
文摘A novel Schiff-base fluorescent probe 6,6'-((1E,1'E)-(ethane-1,2-diylbis(azaneylylidene))bis-(methaneylylidene))bis(3-(diethylamino)phenol)(L)was derived from the 2:1 M condensation of 4-(diethylamino)-2-hydroxybenzaldehyde with ethylenediamine and characterized by ^(1)H NMR,^(13)C NMR and FT-IR spectroscopies.The results of spectral analysis showed that the probe L is selective and sensitive to Cu^(2+).The detection limit of L is found to be 19 nmol·L^(-1).There is a good linear relationship between the fluorescence intensity of probe L and the concentration of Cu^(2+)in the range of 0 to 20μmol×L^(-1).X-ray crystal structure of the L-Cu^(2+)complex and the Job plot revealed a 1:1 L-Cu^(2+)identification.
基金Supported by the Innovation Platform Open Foundation for Colleges and Universities of Hunan Province(No.16k011)the Foundation of Key Laboratory of Functional Metal-organic Compounds of Hunan Province。
文摘A series of dibutyltin complexes,(Bu_(2)Sn)_(2)L,[(Bu_(2)Sn)_(2)L]3 and H_(2)LSnBu_(2),were synthesized by microwave-assisted methanolic solvothermal method,where H4L is[_(2)-(OH)-R-ArCH=NNH]_(2)CX,and X=O,R=4-NEt_(2)(Tl),5-Br(T_(2));X=S,R=H(T3);R=5-Br(T4).Their structures were characterized by elemental analysis,IR and(^(1)H,^(13)C)-NMR spectra.The molecular structure of T_(2) was confirmed by X-ray diffraction.The crystal of T_(2) belongs to monoclinic system,space group la.Five-coordinated distorted triangular bipyramids and six-coordinated distorted octahedral configurations were formed by the coordination of oxygen and nitrogen atoms of ligand with two dibutyltins,thus forming a trimeric hexanuclear butyltin complex by the cross coordination of three units(Bu_(2)Sn)_(2)L with enol imines.The T_(2) and T4 exhibit fluorescence emission in DMF solvents and DMF-water mixture.The fluorescence intensity of T_(2)-DMF-H_(2)0 system decreases almost linearly with the increase of water volume fraction(WVF).The aggregation fluorescence enhancement effect of T4-DMF-H_(2)0 solution system increases with the increase of WVF at the range of 0-_(2)0%WVF.When WVF is more than _(2)0%,the fluorescence intensity decreases with the increase of WVF.In addition,T1〜T4 have broad growth activities on target plants,such as Portulaca oleracea L.,Amaranthus spinosus L.,Cassia tora L.,Brassica campestris L.ssp.chinensis var.utilis Tsen et Lee,and Amaranthus tricolor L.,and can be used as a candidate herbicide for further research.
基金This work was supported by the foundation of Natural Science Research of Jiangsu Education Department (02KJB150007)
文摘The title complex [Cu3L3(H2O)]DMFH2O (H2L = 4-(3-hydroxy-2-ethyl-4- pyridinone-1-yl)-aniline condensation salicylaldehyde) was obtained. The single-crystal X-ray study shows that it is a trinuclear compound [Cu3(C20H15N2O3)3(H2O)]DMFH2O. The coordi- nation sphere about each copper ion in the complex consists of two oxygen atoms from hydroxylpyridinone moiety of one ligand and one oxygen and one nitrogen atoms from salicyladehyde Schiff-base moiety of another ligand arranged in a slightly distorted square planar geometry. Among the three copper ions, one (Cu(2)) is coordinated by the other oxygen atom of water molecule on the fifth coordinate position to form a distorted square pyramid geometry. The crystal is of monoclinic, space group P21/c with a = 12.9202(5), b = 27.197(1), c = 17.0116(7) ? b = 100.588(1), V = 5875.9(4) 3, Z = 4, C63H57N7O12Cu3, Mr = 1294.78, Dc = 1.464 g/cm3, m = 1.146 mm-1, F(000) = 2668, R = 0.0784 and wR = 0.1546 for 6926 observed reflections with I > 2s(I). The differences of coordinate bond lengths are observed between anhydrous and hydrous units: in the former unit, the average bond lengths are 1.978 ?for CuN (azomethine), 1.883 ?for CuO (phenolic) in Schiff-base moiety, 1.959 ?for CuO (keto), and 1.919 ?for CuO (hydroxy) in hydroxypyridinone moiety; while those in the latter are longer with the following corresponding values: 1.985(5), 1.908(5), 1.993(5) and 1.919(4) ? respectively. The Cu(2)O (water) bond length is 2.375(6) ?
文摘The Ni(Ⅱ) complex with ligand 2-N-(2-hydroxy-benzylidene) furanmethanoamine has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group C2/c with a = 2.0280(4), b =0.57700(12), c = 1.7340(4) nm, β = 94.74(3)°, Z = 4, Dc = 1.508 g/cm^3, the final R = 0.0434 and wR = 0.1112 for 1843 observed reflections with 1 〉 2σ(I). X-ray analysis revealed that the Ni(Ⅱ) ion is coordinated by two nitrogen atoms of Schiff base and two oxygen atoms of salicylaldehyde in the equatorial plane, and the coordination geometry can be described as a square.
文摘A new dinuclear copper(II) complex ([Cu(C12H17N2O)(N3)]2, C24H34Cu2N10O2) has been synthesized and characterized by X-ray structure determination. It crystallizes in the monoclinic system, space group P21/c with a = 18.529(4), b = 10.933(2), c = 14.534(3) ?, β = 111.07(3)°, V = 2748(1) ?3, Z = 4, Mr = 621.69, F(000) = 1288, Dc = 1.503 g/cm3 and μ(MoKα) = 1.590 mm?1. The structure was refined to R = 0.0647 and wR = 0.1846 for 4406 observed reflections (I > 2σ(I)). The asymmetric unit comprises two halfmolecules. The complex is a centrosymmetric dimmer in which the copper atoms are penta-coordinated by three coordination atoms from the corresponding tridentate Schiff base ligand and two bridging azide anions. The Cu(II)…Cu(II) average distance is 3.350(1) ?.