1个新的三核镍配位超分子的合成、晶体结构及光物理性质  

Hydrothermal synthesis,crystal structure and photo-physical property of a new trinuclear Ni(Ⅱ) coordination supramolecule

作　　者：金晶[1] 石峰[1] 史忠丰[1] 鄢欣[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）》2013年第3期377-381,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：采用水热方法合成了1个新的Ni（Ⅱ）配合物{[Ni3（dcp）2（phen）2（H2O）6]·4H2O）（H3dcp=吡唑-3，5-二羧酸）．对该配合物进行了单晶X射线衍射结构表征及UV-Vis—NIR吸收光谱，IR光谱和表面光电压光谱（SPS）性质测定．结构分析表明，该配合物为三核Ni（Ⅱ）配合物，其中2个Ni（Ⅱ）离子[Ni2（Ⅱ）、Ni2A（Ⅱ）]是晶体学等效的，另外1个Nil（Ⅱ）离子与它们是不等效的．每个Ni（Ⅱ）离子均为6配位[Nil（Ⅱ）离子配位模式为N2O4，Ni2（Ⅱ）和Ni2A（Ⅱ）离子配位模式为N3O3]，配位构型均为畸变的八面体．配合物最终由氢键网联成具有2D结构的超分子．配合物的表面光电压光谱的测定结果表明，它在300-800nm范围内呈现出正的表面光伏响应，表明它具有一定的光电转换能力．同时对配合物的UV-Vis-NIR吸收光谱和IR光谱进行了分析和指认．A new complex （ ENi3 （dcp）2 （phen）2 （H2 O）6 ] ·4H2 O} （H2 dcp= pyrazole-3,5-dicarboxylic acid） has been synthesized by hydrothermal method. The structure of the complex was determined by single crystal X-ray diffraction,and the properties of UV-Vis-NIR absorption spectra,IR spectra and surface photovoltage spectroscopy （SPS） were investigated. The structure analysis shows that the complex is a trinuclear Ni（ Ⅱ ） coordination complex, in which Ni2 and Ni2A are crystallographically equivalent,the other Ni（ Ⅱ ） ion（Nil） is non-equivalent with them. Every Ni（Ⅱ ） ion is six coordina- ted（N2O） coordination mode for Nil ,N3O3 for Ni2）. The complex is connected into a 2D coordination supramolecule by intermolecular hydrogen bonds. The photo-electric property was investigated by surface photovoltage spectroscopy （SPS）. The SPS results indicate that the complex exhibits positive surface photovoltage responses in the range of 300-800 nm,which show that the complex possesses a certain photoelectric conversion ability. In addition,the UV-V1S-NIR and IR spectra of the complex were determined and analyzed.

关 键 词：三核Ni（Ⅱ）配合物 晶体结构 氢键 光物理性质 

分 类 号：O614.3[理学—无机化学]