柔性配体构筑两个新的Dawson型超分子化合物的合成、结构以及性能研究  

Synthesis,structure and properties of two novel dawson-type supramolecular compounds constructed by flexible ligands

作　　者：刘玉静[1] 杨蒙乐 田爱香[1] 应俊[1] LIU Yu-jing;YANG Meng-le;TIAN Ai-xiang;YING Jun(College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, China)

机构地区：[1]渤海大学化学化工学院,辽宁锦州121013

出　　处：《渤海大学学报（自然科学版）》2017年第4期295-302,共8页Journal of Bohai University:Natural Science Edition

基　　金：国家自然科学基金项目(No:21101015);辽宁省高等学校青年学者成长计划(No:LJQ2012097)

摘　　要：选用两个柔性配体,在水热条件下成功的得到两个新的基于Dawson多酸的超分子化合物,[H_6(L_1)_3(P_2W_(18)O_(62))]_2·5H_2O(1)和[H_6(L_2)_3(P_2W_(18)O_(62))]·3H_2O(2),L_1=1,4-双(5-(4-吡啶基)四唑基)-丁烷,L_2=1,1-双(3,5-二甲基-1H-吡唑基)甲烷.通过红外光谱、元素分析和单晶X-射线对化合物1和2的结构进行了表征.结构分析表明,化合物1的晶胞参数a=42.862,b=15.655,c=29.881(5),α=90°,β=93.72°,γ=90°,V=20008.33,Z=4,R1=0.0565,ωR2=0.1442.化合物2的晶胞参数a=15.020,b=26.347,c=23.177,α=90°,β=106.69°,γ=90°,V=9892(4)3,Z=4,R_1=0.0486,ωR_2=0.1279.化合物1包含两个Dawson多酸阴离子,配体通过氢键环绕在多酸阴离子周围.在化合物2中,配体L_2和Dawson多酸阴离子存在氢键作用拓展成一维超分子链结构,相邻的一维超分子链通过氢键作用形成二维超分子层结构.同时研究了两个化合物的电化学和光催化性质.Two novel flexible ligands were used to obtain two new Dawson polyoxometalates based supramolecular compounds,[H6(L1)3(P2W18O62)]2·5H2O(1)and[H6(L2)3(P2W18O62)]·3H2O(2),L1=1,4-bis(5-(4-pyridyl)tetrazolyl)-butane,L2=1,1-bis(3,5-dimethyl-1H-pyrazolyl)methane.The structures of compounds1and2were characterized by FTIR,elemental analysis and single-crystal X-ray diffraction.Structural analyses show that compound1:a=42.862,b=15.655,c=29.881(5),α=90°,β=93.72°,γ=90°,V=20008.33,Z=4,R1=0.0565,ωR2=0.1442.compound2a=15.020,b=26.347,c=23.177,α=90°,β=106.69°,γ=90°,V=9892(4)3,Z=4,R1=0.0486,ωR2=0.1279.Compound1contained two Dawson polyoxometalates anions,the ligands surround the POMs around by the hydrogen bond.In compound2,the ligand L2and Dawson polyanions can lead a one-dimensional supramolecular chain structure by the hydeogen-bonding interactions,and the adjacent one-dimensional supramolecular chains form a two-dimensional supramolecular layer through hydrogen bonding.We also studied the electrochemical and photocatalytic properties of the two compounds.

关 键 词：Dawson多酸 水热合成 超分子结构 电化学 光催化性质 

分 类 号：O614.812[理学—无机化学]