系列Mn(Ⅱ)配合物的光电性能研究  

Photo-electric properties of a series of manganese(Ⅱ) complexes

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作  者:牛淑云[1] 徐晓婷[1] 张丽[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)》2012年第3期344-348,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2个Mn(Ⅱ)配合物[Mn(pzdc)(H2O)2]n(1)(H2pzdc=3,5-吡唑二羧酸),[Mn(phen)(pdc)(H2O)2]·H2O(2)(H2pdc=2,5-吡啶二羧酸),通过单晶X-射线衍射确定了配合物的晶体结构.结构分析表明,配合物1属于单斜晶系,P21/c空间群,在晶体中,中心金属Mn(Ⅱ)离子为6配位,是以3,5-吡唑二羧酸为桥连接起来的具有1D无限结构的配位聚合物;配合物2属于三斜晶系,P-1空间群,在晶体中,中心金属Mn(Ⅱ)离子为6配位,是单核结构,氢键将其连接成具有2D结构的配位超分子.在室温下对配合物的IR和UV-Vis-NIR吸收光谱进行了测定和分析指认.而且利用表面光电压光谱研究了配合物的表面光伏性能.结果表明,配合物1和2在300~500nm范围内呈现出正的光伏响应.并且随着Mn(Ⅱ)离子配位环境不同,光伏响应带数目和强度也明显不同.Two Mn ( Ⅱ ) complexes [ Mn (pzdc) ( H2 O)2 -]. (1) ( H2 pzdc = 3,57pyrazole dicarboxylic acid) and [Mn (phen) (pdc) (He O)2]·He O (2) (He pdc=2,5-pyridine dicarboxylic acid) have been synthesized by hydrothermal method. The crystal structure of the complexes was determined by sin- gle crystal X-ray diffraction. The structure analysis indicates that complex 1 which is a 1D coordna- tion polymer bridged by 3,5-pyrazole dicarboxylic acid ligand is monoclinic crystal system, P21/c space group, in the structure, the central Mn( Ⅱ ) ion is six-coordinated; complex 2 which is a 2D su- pramolecular linked by hydrogen bond is triclinic crystal system, P-1 space group, in the structure, the central Mn( Ⅱ ) ion is six-coordinated. Under the room temperature, the IR and UV-Vis-NIR ab- sorption spectra of the complexes were measured and analyzed. The photo-electric properties were in- vestigated by surface photovoltage spectroscopy (SPS). The results indicate that the complexes 1 and 2 exhibit positive surface photovoltage responses in the range of 300-500 nm. As the different coordination environment of Mn( Ⅱ ) ions, the number and intensity of photovoltage response bands are obviously different.

关 键 词:Mn(Ⅱ)配合物 晶体结构 光电性能 

分 类 号:O614.3[理学—无机化学]

 

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