A new zinc coordination polymer, [Zn2（bpp）（tpa）2H2O] 1 （bpp=1,3-bis（4-pyridyl）-propane and tpa=terephthalate） has been hydrothermally synthesized and characterized by elemental analysis, IR and single-crystal ...A new zinc coordination polymer, [Zn2（bpp）（tpa）2H2O] 1 （bpp=1,3-bis（4-pyridyl）-propane and tpa=terephthalate） has been hydrothermally synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. X-ray crystal structure analysis reveals that complex 1 crystallizes in monoclinic, space group P2/c with a=18.348（2）, b=10.9080（14）, c=13.7924（18）, β=98.156（2）°, V=2732.5（6）3 , Z=4, C29H24N2O9Zn2 , Mr=675.24, Z=4, F（000）=1376, Dc=1.641 mg/m3 , μ=1.815 mm-1 , the final R=0.0443 and wR=0.0769 for 2715 observed reflections （I〉2σ（I））. The title complex exhibits a two-dimensional （4, 4） sheet structure which is further stacked through face-to-face π-π interactions between the monodentately coordinated pyridine ring of bpp ligand and the phenyl ring of terephthalate ligand to form a 3-dimensional supramolecular structure. Thermogravimetric analyses show that the host framework of the complex is thermally stable up to ca. 400 ℃.展开更多
以2,2-二羟甲基丁酸钠、1,3-丙烷磺内酯为原料,采用磺烷基化反应合成了新型的磺酸盐亲水单体2,2-二羟甲基丁酸-3＇-磺酸钠-丙酯（DMBPS-Na）。采用FT-IR、1H-NMR、13C-NMR、EIS-MS和元素分析等对DMBPS-Na进行了表征。DMBPS-Na的熔点为85...以2,2-二羟甲基丁酸钠、1,3-丙烷磺内酯为原料,采用磺烷基化反应合成了新型的磺酸盐亲水单体2,2-二羟甲基丁酸-3＇-磺酸钠-丙酯（DMBPS-Na）。采用FT-IR、1H-NMR、13C-NMR、EIS-MS和元素分析等对DMBPS-Na进行了表征。DMBPS-Na的熔点为85-90℃,易溶于水、乙醇、N,N-二甲基乙酰胺,微溶于丙酮、乙酸乙酯。以DMBPS-Na为亲水单体,聚四氢呋喃二醇、异佛尔酮二异氰酸酯和乙二胺为原料,采用丙酮法合成了固含量达50%以上的磺酸型聚氨酯分散体（PUD）。性能测试结果显示,DMBPS-Na用量为8 mmol？（100 g）？1树脂时,PUD的平均粒径为122.3 nm,黏度为475 m Pa·s,ζ电位为？66.39 m V,具有良好的稳定性;透射电镜（TEM）显示PUD胶粒呈二元分布的球状结构;PUD胶膜的拉伸强度为10.66 MPa,断裂伸长率为1160%;PUD胶膜的起始分解温度约为270℃,至490℃时基本分解完全。展开更多
N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide was synthesized for the application in ionic liquid based electrolytes in lithium ion battery, 10% vinylene carbonate (VC) and 10% 1,3-propane sultone (...N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide was synthesized for the application in ionic liquid based electrolytes in lithium ion battery, 10% vinylene carbonate (VC) and 10% 1,3-propane sultone (PS) were added to the electrolyte system respectively as additives to improve the property of solid electrolyte interface and cyclic performance. The results of cyclic voltammetry showed that homogenous and compact solid electrolyte interface film formed on graphite electrode which was detected by observing the morphology of cycled graphite anode. Charging and discharging performance of LiFePO4/Li half cell was tested in the electrolyte with or without additives. The initial specific discharging capacities were increased to 129.4 and 123.0 mA·h/g by the addition of VC and PS, respectively, compared with that of additive-free electrolyte. The discharging retentions were 88.9% and 84.6% in electrolyte containing VC and PS after 10 cycles.展开更多
基金supported by the Education Office of Anhui Province (No. 2011SQRL080)
文摘A new zinc coordination polymer, [Zn2（bpp）（tpa）2H2O] 1 （bpp=1,3-bis（4-pyridyl）-propane and tpa=terephthalate） has been hydrothermally synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. X-ray crystal structure analysis reveals that complex 1 crystallizes in monoclinic, space group P2/c with a=18.348（2）, b=10.9080（14）, c=13.7924（18）, β=98.156（2）°, V=2732.5（6）3 , Z=4, C29H24N2O9Zn2 , Mr=675.24, Z=4, F（000）=1376, Dc=1.641 mg/m3 , μ=1.815 mm-1 , the final R=0.0443 and wR=0.0769 for 2715 observed reflections （I〉2σ（I））. The title complex exhibits a two-dimensional （4, 4） sheet structure which is further stacked through face-to-face π-π interactions between the monodentately coordinated pyridine ring of bpp ligand and the phenyl ring of terephthalate ligand to form a 3-dimensional supramolecular structure. Thermogravimetric analyses show that the host framework of the complex is thermally stable up to ca. 400 ℃.
文摘以2,2-二羟甲基丁酸钠、1,3-丙烷磺内酯为原料,采用磺烷基化反应合成了新型的磺酸盐亲水单体2,2-二羟甲基丁酸-3＇-磺酸钠-丙酯（DMBPS-Na）。采用FT-IR、1H-NMR、13C-NMR、EIS-MS和元素分析等对DMBPS-Na进行了表征。DMBPS-Na的熔点为85-90℃,易溶于水、乙醇、N,N-二甲基乙酰胺,微溶于丙酮、乙酸乙酯。以DMBPS-Na为亲水单体,聚四氢呋喃二醇、异佛尔酮二异氰酸酯和乙二胺为原料,采用丙酮法合成了固含量达50%以上的磺酸型聚氨酯分散体（PUD）。性能测试结果显示,DMBPS-Na用量为8 mmol？（100 g）？1树脂时,PUD的平均粒径为122.3 nm,黏度为475 m Pa·s,ζ电位为？66.39 m V,具有良好的稳定性;透射电镜（TEM）显示PUD胶粒呈二元分布的球状结构;PUD胶膜的拉伸强度为10.66 MPa,断裂伸长率为1160%;PUD胶膜的起始分解温度约为270℃,至490℃时基本分解完全。
基金Supported by National Natural Science Foundation of China (No.20976174)Open-end Fund of National Key Laboratory of Multiphase Complex Systems (No.MPCS-2011-D-06)
文摘N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide was synthesized for the application in ionic liquid based electrolytes in lithium ion battery, 10% vinylene carbonate (VC) and 10% 1,3-propane sultone (PS) were added to the electrolyte system respectively as additives to improve the property of solid electrolyte interface and cyclic performance. The results of cyclic voltammetry showed that homogenous and compact solid electrolyte interface film formed on graphite electrode which was detected by observing the morphology of cycled graphite anode. Charging and discharging performance of LiFePO4/Li half cell was tested in the electrolyte with or without additives. The initial specific discharging capacities were increased to 129.4 and 123.0 mA·h/g by the addition of VC and PS, respectively, compared with that of additive-free electrolyte. The discharging retentions were 88.9% and 84.6% in electrolyte containing VC and PS after 10 cycles.
