Dimethyl-1-(1, 2, 4-triazol) -2- butanone was treated with aqueous formaldehyde to give an additional product, and subsequent elimination by acetic anhydride yielded 4, 4-dimethyl-2-(1, 2, 4-triazol)-1-penten-3-one. ...Dimethyl-1-(1, 2, 4-triazol) -2- butanone was treated with aqueous formaldehyde to give an additional product, and subsequent elimination by acetic anhydride yielded 4, 4-dimethyl-2-(1, 2, 4-triazol)-1-penten-3-one. Further addition with substituted amines provided a series of (1, 2, 4-triazol)-4, 4-dimethyl-3-pentanone, which were then reduced by KBH4 to obtain a series of (1, 2, 4-triazol)-4, 4-dimethyl-3-pentanol. Their structures were confirmed by 1HNMR and elemental analysis. The results of bioassay showed that the title products possess good fungicidal activities.展开更多
Dimethylaminophenyl)-5-fluoro-6-(morpholin-4-yl)-1H-benzimidazole(1) has been synthesized and characterized by H-NMR, MS and elemental analysis. UV-Vis spectra of the 1 aqueous solutions at different pH values reveal ...Dimethylaminophenyl)-5-fluoro-6-(morpholin-4-yl)-1H-benzimidazole(1) has been synthesized and characterized by H-NMR, MS and elemental analysis. UV-Vis spectra of the 1 aqueous solutions at different pH values reveal that compound 1 can combine three protons. Its three protonation constants are determined by spectrophotometry and calculated by non-linear least squares. The results of steady-state fluorescence measurements indicate that a special interaction occurs between compound 1 and calf thymus DNA, of which the binding constant, Kb, is (2.30 ± 0.10)×l04 L/mol. Compound 1 in the concentration range of 10-8 to 1.2×10-6 mol/L could be used for quantitative determination of DNA.展开更多
A 1-octadecanol（OD）/1,3:2,4-di-（3,4-dimethyl） benzylidene sorbitol（DMDBS）/expander graphite（EG） composite was prepared as a form-stable phase change material（PCM） by vacuum melting method. The results of fie...A 1-octadecanol（OD）/1,3:2,4-di-（3,4-dimethyl） benzylidene sorbitol（DMDBS）/expander graphite（EG） composite was prepared as a form-stable phase change material（PCM） by vacuum melting method. The results of field emission-scanning electron microscopy（FE-SEM） showed that 1-octadecanol was restricted in the three-dimensional network formed by DMDBS and the honeycomb network formed by EG. X-ray diffraction（XRD） and Fourier transform infrared spectroscopy（FT-IR） results showed that no chemical reaction occurred among the components of composite PCM in the preparation process. The gel-to-sol transition temperature of the composite PCMs containing DMDBS was much higher than the melting point of pure 1-octadecanol. The improvements in preventing leakage and thermal stability limits were mainly attributed to the synergistic effect of the three-dimensional network formed by DMDBS and the honeycomb network formed by EG. Differential scanning calorimeter（DSC） was used to determine the latent heat and phase change temperature of the composite PCMs. During melting and freezing process the latent heat values of the PCM with the composition of 91% OD/3% DMDBS/6% EG were 214.9 and 185.9 kJ·kg-1, respectively. Its degree of supercooling was only 0.1 ℃. Thermal constant analyzer results showed that its thermal conductivity（κ） changed up to roughly 10 times over that of OD/DMDBS matrix.展开更多
The chemical preparation, crystal structure and spectroscopic characterization of a novel organic-inorganic hybrid material, bis(4-dimethylaminopyridinium) tetrachlorocuprate, have been reported. This compound crystal...The chemical preparation, crystal structure and spectroscopic characterization of a novel organic-inorganic hybrid material, bis(4-dimethylaminopyridinium) tetrachlorocuprate, have been reported. This compound crystallizes in the monoclinic system in space group C2/c and cell parameters a = 12.4356 (18), b = 12.0901 (17), c = 14.094 (2) Å, β = 115.303 (2)°, Z = 4 and V = 1915.8 (5) Å3. In the title salt, (C7H11N2)2CuCl4, both 4-dimethylaminopyridinium cations are protonated at their pyridine N atoms. The geometry of the CuCl2-4 ions is intermediate between tetrahedral and square planar. The atomic arrangement can be described by an alternation of inorganic layers built up by tetrachlorocuprate anions and organic layers formed by 4-dimethylaminopyridinium cations. The organic layers are located in sandwich between the inorganic layers. The anionic and cationic layers are held together by N-H···Cl and C-H···Cl hydrogen bonds into a three-dimensional network. The individual cations are π-π stacked with their neighbors at a distance of 3.7622 (5) Å. The vibrational absorption bands were identified by infrared spectroscopy and DFT calculations allowed their attribution.展开更多
The thermal decomposition of a new antitumor agent,4-{5-[3,4-dimethyl-5-(3,4,5-trimethoxyphenyl)thiophen-2-yl]-2-methoxyphenyl}morpholine was studied by Differential Scanning Calorimetry(DSC)and Thermogravimetry(TG)/D...The thermal decomposition of a new antitumor agent,4-{5-[3,4-dimethyl-5-(3,4,5-trimethoxyphenyl)thiophen-2-yl]-2-methoxyphenyl}morpholine was studied by Differential Scanning Calorimetry(DSC)and Thermogravimetry(TG)/Derivative Thermogravimetry(DTG)methods at a flow rate of nitrogen gas of 120 mL/min,The kinetic parameters were obtained from the analysis of the corresponding curves by Kissinger's method,Ozawa's method and the integral method,The results indicate that the apparent activation energy and pre-exponential constants of the decomposition reaction are 106.67 kJ/mol and 10^6.19s^(-1),respectively.展开更多
The title compound, 1,4-dimethyl-2,5-di { [2′-（3-pyridylmethylaminoformyl）phenoxyl]- methyl}benzene perchlorate （C36H36Cl2N4O12, Mr = 787.59）, has been synthesized and structurally determined by single-crystal X-...The title compound, 1,4-dimethyl-2,5-di { [2′-（3-pyridylmethylaminoformyl）phenoxyl]- methyl}benzene perchlorate （C36H36Cl2N4O12, Mr = 787.59）, has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal crystallizes in the orthorhombic system, space group Pbca with a = 14.366（4）, b = 15.159（4）, c = 16.443（5）A, V = 3580.9（17）/A3 Z = 4, De = 1.461 g/cm^3, /t = 0.253 mm^-1, F（000） = 1640, R = 0.0618 and wR = 0.1525 for 1615 observed reflections （I 〉 2σ（I））. In the structure of the title compound, a two-dimensional supramolecular layer is formed via intermolecular hydrogen bonding interactions.展开更多
文摘Dimethyl-1-(1, 2, 4-triazol) -2- butanone was treated with aqueous formaldehyde to give an additional product, and subsequent elimination by acetic anhydride yielded 4, 4-dimethyl-2-(1, 2, 4-triazol)-1-penten-3-one. Further addition with substituted amines provided a series of (1, 2, 4-triazol)-4, 4-dimethyl-3-pentanone, which were then reduced by KBH4 to obtain a series of (1, 2, 4-triazol)-4, 4-dimethyl-3-pentanol. Their structures were confirmed by 1HNMR and elemental analysis. The results of bioassay showed that the title products possess good fungicidal activities.
基金This work was financially supported by the National Natural Science Foundation of China(20171005)
文摘Dimethylaminophenyl)-5-fluoro-6-(morpholin-4-yl)-1H-benzimidazole(1) has been synthesized and characterized by H-NMR, MS and elemental analysis. UV-Vis spectra of the 1 aqueous solutions at different pH values reveal that compound 1 can combine three protons. Its three protonation constants are determined by spectrophotometry and calculated by non-linear least squares. The results of steady-state fluorescence measurements indicate that a special interaction occurs between compound 1 and calf thymus DNA, of which the binding constant, Kb, is (2.30 ± 0.10)×l04 L/mol. Compound 1 in the concentration range of 10-8 to 1.2×10-6 mol/L could be used for quantitative determination of DNA.
基金Funded by Science and Technology Support Program of Hubei Province of China(No.2015BAA111)
文摘A 1-octadecanol（OD）/1,3:2,4-di-（3,4-dimethyl） benzylidene sorbitol（DMDBS）/expander graphite（EG） composite was prepared as a form-stable phase change material（PCM） by vacuum melting method. The results of field emission-scanning electron microscopy（FE-SEM） showed that 1-octadecanol was restricted in the three-dimensional network formed by DMDBS and the honeycomb network formed by EG. X-ray diffraction（XRD） and Fourier transform infrared spectroscopy（FT-IR） results showed that no chemical reaction occurred among the components of composite PCM in the preparation process. The gel-to-sol transition temperature of the composite PCMs containing DMDBS was much higher than the melting point of pure 1-octadecanol. The improvements in preventing leakage and thermal stability limits were mainly attributed to the synergistic effect of the three-dimensional network formed by DMDBS and the honeycomb network formed by EG. Differential scanning calorimeter（DSC） was used to determine the latent heat and phase change temperature of the composite PCMs. During melting and freezing process the latent heat values of the PCM with the composition of 91% OD/3% DMDBS/6% EG were 214.9 and 185.9 kJ·kg-1, respectively. Its degree of supercooling was only 0.1 ℃. Thermal constant analyzer results showed that its thermal conductivity（κ） changed up to roughly 10 times over that of OD/DMDBS matrix.
文摘The chemical preparation, crystal structure and spectroscopic characterization of a novel organic-inorganic hybrid material, bis(4-dimethylaminopyridinium) tetrachlorocuprate, have been reported. This compound crystallizes in the monoclinic system in space group C2/c and cell parameters a = 12.4356 (18), b = 12.0901 (17), c = 14.094 (2) Å, β = 115.303 (2)°, Z = 4 and V = 1915.8 (5) Å3. In the title salt, (C7H11N2)2CuCl4, both 4-dimethylaminopyridinium cations are protonated at their pyridine N atoms. The geometry of the CuCl2-4 ions is intermediate between tetrahedral and square planar. The atomic arrangement can be described by an alternation of inorganic layers built up by tetrachlorocuprate anions and organic layers formed by 4-dimethylaminopyridinium cations. The organic layers are located in sandwich between the inorganic layers. The anionic and cationic layers are held together by N-H···Cl and C-H···Cl hydrogen bonds into a three-dimensional network. The individual cations are π-π stacked with their neighbors at a distance of 3.7622 (5) Å. The vibrational absorption bands were identified by infrared spectroscopy and DFT calculations allowed their attribution.
基金SUPPORTED BY THE NATIONAL YOUNG SCHOLAR AWARD OF NSFC(NO.30125043).
文摘The thermal decomposition of a new antitumor agent,4-{5-[3,4-dimethyl-5-(3,4,5-trimethoxyphenyl)thiophen-2-yl]-2-methoxyphenyl}morpholine was studied by Differential Scanning Calorimetry(DSC)and Thermogravimetry(TG)/Derivative Thermogravimetry(DTG)methods at a flow rate of nitrogen gas of 120 mL/min,The kinetic parameters were obtained from the analysis of the corresponding curves by Kissinger's method,Ozawa's method and the integral method,The results indicate that the apparent activation energy and pre-exponential constants of the decomposition reaction are 106.67 kJ/mol and 10^6.19s^(-1),respectively.
基金supported by the National Natural Science Foundation of China (No. 20401008)
文摘The title compound, 1,4-dimethyl-2,5-di { [2′-（3-pyridylmethylaminoformyl）phenoxyl]- methyl}benzene perchlorate （C36H36Cl2N4O12, Mr = 787.59）, has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal crystallizes in the orthorhombic system, space group Pbca with a = 14.366（4）, b = 15.159（4）, c = 16.443（5）A, V = 3580.9（17）/A3 Z = 4, De = 1.461 g/cm^3, /t = 0.253 mm^-1, F（000） = 1640, R = 0.0618 and wR = 0.1525 for 1615 observed reflections （I 〉 2σ（I））. In the structure of the title compound, a two-dimensional supramolecular layer is formed via intermolecular hydrogen bonding interactions.
