配聚物[Cd_2(2,5-pdc)_2(H_2O)_4]_n的光电性能  

The photo-electric propery of the polymer[Cd_2(2,5-pdc)_2(H_2O)_4]_n

作　　者：牛淑云[1] 计雅楠 刘佳操[1] 丁榆[1] 

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2014年第1期68-72,共5页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(20571037);辽宁省教育厅创新团队项目(2007T092)

摘　　要：采用水热合成法，以2，5-吡啶-二羧酸为配体，得到了Cd（Ⅱ）配聚物：[Cd2（2，5-pdc）2（H2 O ）4]n （2，5-H2 pdc＝2，5-吡啶-二羧酸）。采用X射线单晶衍射确定了配聚物的晶体结构。配聚物的不对称单元为 Cd2（2，5-pdc）2（H2 O）4，其中两个不等效的金属Cd（Ⅱ）离子均为6配位。在配聚物晶体中，Cd（Ⅱ）离子之间通过pdc2-上的羧基O原子连接，形成了具有2D结构的配聚物，氢键进一步将其连接成3D超分子。采用表面光电压光谱（S PS ）研究了配聚物的表面光电性能。结果表明，该配聚物在300～800 nm范围内呈现出较强的光伏响应，表明他具有一定的光-电转换能力。对配聚物的 U V-Vis-NIR吸收光谱、IR光谱进行了测定和指认，并将 SPS 谱与 UV-Vis-NIR 吸收光谱进行了关联。The polymer [Cd2 （2 ,5-pdc）2 （H2 O）4 ]n has been synthesized by hydrothermal method with the 2 ,5-H2 pdc as ligand .The crystal structure of the polymer was determined by single crystal X ray diffraction .Structural analysis shows that the asymmetric unit is Cd2（2 ,5-pdc）2（H2O）4 ,in which the two independent Cd（Ⅱ ）ions（Cd1 and Cd2）are all six-coordinated .In the crystal ,Cd（Ⅱ ）ions are bridged by the O atoms of pdc2 - groups into 2D extended structure .Moreover ,the intermolecular H-bonds connect 2D layers into 3D structure .The photo-electric property of the polymer was investiga-ted by surface photovoltage spectroscopy （SPS） .The result indicates that the polymer exhibits posi-tive surface photovoltage responses in the range of 300~800 nm ,so it possesses certain photo-electric conversion property .The UV-Vis-NIR and IR spectra of the polymer were measured and analyzed . And the SPS spectrum has been related with its UV-Vis-NIR spectrum .

关 键 词：Cd(Ⅱ)配聚物 晶体结构 合成 光电性能 

分 类 号：O614.3[理学—无机化学]