A new polymer [Zn2(cam)2(bpmp)]n 1 (H2cam = D-(+)-camphoric acid, bpmp = bis(4-pyridylmethyl)piperazine) was synthesized under hydrothermal conditions. The compound crystallizes in the monoclinic system, sp...A new polymer [Zn2(cam)2(bpmp)]n 1 (H2cam = D-(+)-camphoric acid, bpmp = bis(4-pyridylmethyl)piperazine) was synthesized under hydrothermal conditions. The compound crystallizes in the monoclinic system, space group P21/n with a = 12.305(9), b = 12.945(9), c = 13.619(10) A, β = 116.833(8)°, V= 1936(2)A3, Z = 4, Mr = 397.76, Dc= 1.365 Mg/m3,μ = 1.292 mm-1, F(000) = 832, the final R = 0.0578 and wR = 0.1678 for 2838 observed reflections with I 〉 2σ(I). The compound presents a three-dimensional (3D) network extended by homochiral 2D layer and bpmp ligands. From the topology point of view, the structure could be described as a 3D 6-connected mab net with (44.610.8) topology. In addition, infrared spectroscopy, elemental analyses, thermogravimetric analysis and powder X-ray diffraction properties of 1 are also investigated.展开更多
A phosphrous-containing poly(aryl ether ketone) was synthesized derived from bisphenol-A and bis[4-(4- fluorobenzoyl)phenyl] phenyl phosphine oxide (FPPPO) by nucleophilic substitution reaction. The structure of...A phosphrous-containing poly(aryl ether ketone) was synthesized derived from bisphenol-A and bis[4-(4- fluorobenzoyl)phenyl] phenyl phosphine oxide (FPPPO) by nucleophilic substitution reaction. The structure of the polymer was characterized by FT-IR, ^1H-NMR and ^31p-NMR. The thermal property of the PAEK was measured by DSC and TGA. The glass transition temperature (Tg) of the polymer was 205℃, and the 5% weight loss temperature under nitrogen was 475℃. Good solubility of the polymer in organic solvents, such as N-methylpyrrolidone, dimethylformamide, dimethylacetamide, dimethylsulfoxide and chloroalkanes was observed, flexible film was obtained from the polymer's CH2Cl2 solution. The limiting oxygen index (LOI) of the PAEK was 40, which indicated that organic phosphorus moiety can offer good flame retardant property to the polymer.展开更多
Series Bi3NbO7/Bi2Zn(2/3)Nb(4/3)O7 (BN/BZN) composites were synthesized through a facile solid state reaction method. The products were characterized by X-ray diffraction(XRD), field emission scanning electron...Series Bi3NbO7/Bi2Zn(2/3)Nb(4/3)O7 (BN/BZN) composites were synthesized through a facile solid state reaction method. The products were characterized by X-ray diffraction(XRD), field emission scanning electron microscopy(FE-SEM) and UV-vis diffuse reflectance spectroscopy(DRS). When BN: BZN=0.1 mole ratio, the BN/BZN composite showed the best visible-light-driven photocatalytic performance, which decomposed nearly 100% of Rh B(10 ppm, p H=3-4) within 40 min. The results demonstrated that in-situ solid state synthesis of BN/BZN composites could be an efficient strategy to develop new photocatalyst for environmental remediation.展开更多
A novel cobalt(Ⅱ) coordination polymer, [Co(tdc)(bpmp)(H2O)]n(1), was hydrothermally synthesized using 2,5-thiophenedicarboxylate(tdc) and bis(4-pyridylmethyl)piperazine(bpmp) ligand as the organic li...A novel cobalt(Ⅱ) coordination polymer, [Co(tdc)(bpmp)(H2O)]n(1), was hydrothermally synthesized using 2,5-thiophenedicarboxylate(tdc) and bis(4-pyridylmethyl)piperazine(bpmp) ligand as the organic linkers. X-ray single-crystal diffraction determination reveals that 1 crystallizes in the monoclinic Cc space group, with a = 18.836(2), b = 5.9540(7), c = 20.414(2) A, β = 97.4300(10)°, V = 2270.1(5) A3, Z = 4, Mr = 515.44, Dc = 1.508 Mg/m^3, μ = 0.890 mm-1, F(000) = 1068, the final R = 0.0263 and w R = 0.0665 for 3714 observed reflections with I 2σ(I). In compound 1, the Co(Ⅱ) ions are connected by tdc2- anions to form a 1D double chain, and such chains are further linked by bpmp ligands to form a three-dimensional(3D) structure. Topologically, the structure of 1 represents a uninodal 3D dia(6^6) topology. What's more, powder X-ray diffraction patterns and photocatalytic property for 1 have also been investigated.展开更多
A green and convenient approach for the synthesis of a series of 5,5'-(arylmethylene)bis(4-hydroxythiazole-2(3H)-one) by the reaction of aryl aldehydes,monochloroacetic acid and ammonium thiocyanate in water/tr...A green and convenient approach for the synthesis of a series of 5,5'-(arylmethylene)bis(4-hydroxythiazole-2(3H)-one) by the reaction of aryl aldehydes,monochloroacetic acid and ammonium thiocyanate in water/trifluoroethanol(TFE)(1:1) under ultrasound irradiation at room temperature is described.This method provides several advantages such as environmental friendliness,shorter time,excellent yields,and simple work-up procedure.展开更多
A novel coordination polymer, namely [Zn2(CAPA)(DMA)(H2O)]2n·n(H2O)(1,H4CAPA = 5-(bis(4-carboxybenzyl) amino) isophthalic acid, DMA = N,N-dimethylacetamide) has been synthesized through a solvotherm...A novel coordination polymer, namely [Zn2(CAPA)(DMA)(H2O)]2n·n(H2O)(1,H4CAPA = 5-(bis(4-carboxybenzyl) amino) isophthalic acid, DMA = N,N-dimethylacetamide) has been synthesized through a solvothermal method and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectra, and thermogravimetric analyses. The crystal structure is of monoclinic, space group P21/n with a = 8.0585(5), b = 18.9733(10), c = 20.2044(14) A^°3, β = 101.144(7)°, V = 3030.9(3) ?~3, C56H54Zn4N4O21, Mr = 1378.58, Z = 2). The compound forms a three-dimensional(3D) supramolecular framework by linking adjacent layers via hydrogen bonds and π···π interactions. It is interesting that the crystal structure is much related to the flexibility and configuration of the ligand. In addition, the thermal stability and luminescence properties for the compound have also been investigated.展开更多
Using aromatic bis(4-bromophenyl) ether and various aromatic diamines as the monomers, a series of novel poly(amine ether)s (PAEs) have been synthesized via palladium-catalyzed aryl amination, which is the Hartw...Using aromatic bis(4-bromophenyl) ether and various aromatic diamines as the monomers, a series of novel poly(amine ether)s (PAEs) have been synthesized via palladium-catalyzed aryl amination, which is the Hartwig-Buchwald polycondensation reaction. Their structures were characterized by means of elemental analysis, FT-IR, 1^H NMR and UV-Vis spectroscopy. The results show a good agreement with the proposed structures. Their general properties were studied by DSC and TG and it's obvious that they show high glass transition temperatures (Tg〉200 ℃), good thermal stability with high decomposition temperatures (TD〉500℃) and excellent solubility. The mechanical behavior of these polymers suggested that they could be considered a new class of high-performance polymers.展开更多
基金Supported by the National Natural Science Foundation of China(No.21076063)Foundation of Henan Educational Committee(No.13A150244)
文摘A new polymer [Zn2(cam)2(bpmp)]n 1 (H2cam = D-(+)-camphoric acid, bpmp = bis(4-pyridylmethyl)piperazine) was synthesized under hydrothermal conditions. The compound crystallizes in the monoclinic system, space group P21/n with a = 12.305(9), b = 12.945(9), c = 13.619(10) A, β = 116.833(8)°, V= 1936(2)A3, Z = 4, Mr = 397.76, Dc= 1.365 Mg/m3,μ = 1.292 mm-1, F(000) = 832, the final R = 0.0578 and wR = 0.1678 for 2838 observed reflections with I 〉 2σ(I). The compound presents a three-dimensional (3D) network extended by homochiral 2D layer and bpmp ligands. From the topology point of view, the structure could be described as a 3D 6-connected mab net with (44.610.8) topology. In addition, infrared spectroscopy, elemental analyses, thermogravimetric analysis and powder X-ray diffraction properties of 1 are also investigated.
基金This work was supported by the National Natural Science Foundation of China(No.50203008).
文摘A phosphrous-containing poly(aryl ether ketone) was synthesized derived from bisphenol-A and bis[4-(4- fluorobenzoyl)phenyl] phenyl phosphine oxide (FPPPO) by nucleophilic substitution reaction. The structure of the polymer was characterized by FT-IR, ^1H-NMR and ^31p-NMR. The thermal property of the PAEK was measured by DSC and TGA. The glass transition temperature (Tg) of the polymer was 205℃, and the 5% weight loss temperature under nitrogen was 475℃. Good solubility of the polymer in organic solvents, such as N-methylpyrrolidone, dimethylformamide, dimethylacetamide, dimethylsulfoxide and chloroalkanes was observed, flexible film was obtained from the polymer's CH2Cl2 solution. The limiting oxygen index (LOI) of the PAEK was 40, which indicated that organic phosphorus moiety can offer good flame retardant property to the polymer.
基金Funded by the National Natural Science Foundation of China(No.51662005)the Guangxi Natural Science Foundation(No.2014GXNSFFA118004)
文摘Series Bi3NbO7/Bi2Zn(2/3)Nb(4/3)O7 (BN/BZN) composites were synthesized through a facile solid state reaction method. The products were characterized by X-ray diffraction(XRD), field emission scanning electron microscopy(FE-SEM) and UV-vis diffuse reflectance spectroscopy(DRS). When BN: BZN=0.1 mole ratio, the BN/BZN composite showed the best visible-light-driven photocatalytic performance, which decomposed nearly 100% of Rh B(10 ppm, p H=3-4) within 40 min. The results demonstrated that in-situ solid state synthesis of BN/BZN composites could be an efficient strategy to develop new photocatalyst for environmental remediation.
基金supported by the Natural Science Foundation of Henan Province(132300410326)
文摘A novel cobalt(Ⅱ) coordination polymer, [Co(tdc)(bpmp)(H2O)]n(1), was hydrothermally synthesized using 2,5-thiophenedicarboxylate(tdc) and bis(4-pyridylmethyl)piperazine(bpmp) ligand as the organic linkers. X-ray single-crystal diffraction determination reveals that 1 crystallizes in the monoclinic Cc space group, with a = 18.836(2), b = 5.9540(7), c = 20.414(2) A, β = 97.4300(10)°, V = 2270.1(5) A3, Z = 4, Mr = 515.44, Dc = 1.508 Mg/m^3, μ = 0.890 mm-1, F(000) = 1068, the final R = 0.0263 and w R = 0.0665 for 3714 observed reflections with I 2σ(I). In compound 1, the Co(Ⅱ) ions are connected by tdc2- anions to form a 1D double chain, and such chains are further linked by bpmp ligands to form a three-dimensional(3D) structure. Topologically, the structure of 1 represents a uninodal 3D dia(6^6) topology. What's more, powder X-ray diffraction patterns and photocatalytic property for 1 have also been investigated.
文摘A green and convenient approach for the synthesis of a series of 5,5'-(arylmethylene)bis(4-hydroxythiazole-2(3H)-one) by the reaction of aryl aldehydes,monochloroacetic acid and ammonium thiocyanate in water/trifluoroethanol(TFE)(1:1) under ultrasound irradiation at room temperature is described.This method provides several advantages such as environmental friendliness,shorter time,excellent yields,and simple work-up procedure.
基金supported by the “Strategic Priority Research Program” of the Chinese Academy of Sciences(XDA07070200,XDA09030102)the Science Foundation of Fujian Province(2006l2005)
文摘A novel coordination polymer, namely [Zn2(CAPA)(DMA)(H2O)]2n·n(H2O)(1,H4CAPA = 5-(bis(4-carboxybenzyl) amino) isophthalic acid, DMA = N,N-dimethylacetamide) has been synthesized through a solvothermal method and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectra, and thermogravimetric analyses. The crystal structure is of monoclinic, space group P21/n with a = 8.0585(5), b = 18.9733(10), c = 20.2044(14) A^°3, β = 101.144(7)°, V = 3030.9(3) ?~3, C56H54Zn4N4O21, Mr = 1378.58, Z = 2). The compound forms a three-dimensional(3D) supramolecular framework by linking adjacent layers via hydrogen bonds and π···π interactions. It is interesting that the crystal structure is much related to the flexibility and configuration of the ligand. In addition, the thermal stability and luminescence properties for the compound have also been investigated.
基金Project supported by the National Natural Science Foundation of China (No. 10576017).
文摘Using aromatic bis(4-bromophenyl) ether and various aromatic diamines as the monomers, a series of novel poly(amine ether)s (PAEs) have been synthesized via palladium-catalyzed aryl amination, which is the Hartwig-Buchwald polycondensation reaction. Their structures were characterized by means of elemental analysis, FT-IR, 1^H NMR and UV-Vis spectroscopy. The results show a good agreement with the proposed structures. Their general properties were studied by DSC and TG and it's obvious that they show high glass transition temperatures (Tg〉200 ℃), good thermal stability with high decomposition temperatures (TD〉500℃) and excellent solubility. The mechanical behavior of these polymers suggested that they could be considered a new class of high-performance polymers.