高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (8): 1833.doi: 10.7503/cjcu20120905

• 研究论文: 无机化学 • 上一篇    下一篇

Cd(Ⅱ)-btec配聚物的合成、结构及光电性能

金晶, 丁榆, 李丹, 迟玉贤, 牛淑云   

  1. 辽宁师范大学化学化工学院, 大连 116029
  • 收稿日期:2012-10-05 出版日期:2013-08-10 发布日期:2013-07-19
  • 通讯作者: 牛淑云,女,教授,博士生导师.主要从事配位化学研究.E-mail:syniu@sohu.com E-mail:syniu@sohu.com
  • 基金资助:

    国家自然科学基金(批准号: 21133005)和辽宁省教育厅项目(批准号: L2011193)资助.

Syntheses, Structures and Surface Photo-electric Properties of Cd(Ⅱ)-btec Coordination Polymers

JIN Jing, DING Yu, LI Dan, CHI Yu-Xian, NIU Shu-Yun   

  1. School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
  • Received:2012-10-05 Online:2013-08-10 Published:2013-07-19
  • Contact: shuyun niu E-mail:syniu@sohu.com

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被引次数

2

摘要：

采用水热法合成了Cd(Ⅱ)配聚物[Cd3Na2(btec)n(1)和{[Cd3Na2(btec)2(H2O)2]·4H2O}n(2)(H4btec=1,2,4,5-苯四甲酸). 单晶结构解析结果表明, 配聚物1和2的不对称单元中均包含2种晶体学不等效的Cd(Ⅱ)离子, 分别为六配位和八配位, 均通过btec4-基团桥连成具有3D无限结构的配聚物. 二者区别在于: 2个配聚物中Na(Ⅰ)离子的配位环境不同, 且配聚物2中存在游离水分子. 表面光伏技术研究结果表明, 2个配聚物在300~500 nm范围内呈现出明显的光伏响应, 表明它们具有一定的光-电转换能力. 对配聚物的表面光电压谱(SPS)与紫外-可见吸收光谱(UV-Vis)进行了关联, 并对配聚物进行了X射线衍射(XRD)和热重(TG)分析.

关键词: Cd(Ⅱ)配聚物, 水热合成, 结构, 光电性能

Abstract:

Two Cd(Ⅱ) coordination polymers [Cd3Na2 (btec)2(H2O)2]n(1) and {[Cd3Na2(btec)2·(H2O)2]·4H2O}n(2)(H4btec=1,2,4,5-benzenetetracarboxylic acid) were synthesized by hydrothermal method. The structures were determined by single crystal X-ray diffraction. Structural analyses show that the asymmetric units of polymers 1 and 2 contain two crystallographically unique Cd(Ⅱ) ions with six- and eight-coordinate, respectively, and they possess 3D structures bridged by btec4- groups. The structure differences between them are that the coordination environment around Na(Ⅰ) ions is different and polymer 2 has lattice water molecules. The photo-electric properties of the two polymers were investigated by surface photovoltage spectroscopy(SPS). The results of SPS show that the two polymers exhibit obvious photovoltage responses in the range of 300-500 nm, which indicates that they all possess certain photo-electric conversion properties. The SPS and UV-Vis spectra of the polymers were interrelated, and XRD patterns and TG curves of the two polymers were measured and analyzed.

Key words: Cd(Ⅱ) coordination polymer, Hydrothermal synthesis, Structure, Photoelectric property

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