一种锰的超分子化合物的制备、结构及非线性光学性质研究  

Synthesis, Crystal Structure and Nonlinear Optical Properties of a Manganese Supramolecular Compound

作　　者：孟祥茹[1] 李林科[1] 朱玉[1] 杜晨霞[1] 樊耀亭[1] 侯红卫[1] 宋瑛林[2] 

机构地区：[1]郑州大学化学系 [2]哈尔滨工业大学物理系

出　　处：《化学学报》2001年第8期1277-1282,共6页Acta Chimica Sinica

基　　金：国家自然科学基金，国家留学回国人员科研启动基金

摘　　要：用MnSO4@H2O,KSCN,六次甲基四胺(HMTA)制备出超分子化合物[Mn(NCS)2(H2O)2(HMTA)2][Mn(NCS)2-(H2O)4](H2O)2,并测定了其晶体结构.该化合物由[Mn(NCS)2(H2O)2(HMTA)2],[Mn(NCS)2(H2O)4]和H2O三部分组成,每一个HMTA配体中仅有一个N原子与Mn原子配位,剩余的3个N分别与[Mn(NCS)2(H2O)4]中的H2O及结晶H2O之间形成氢键.[Mn(NCS)2(H2O)2(HMTA)2]和[Mn(NCS)2(H2O)4]之间通过N…H-O氢键连接成无限延伸的线性长链,链与链、以及链和结晶H2O之间通过七种形式的氢键构成三维结构的超分子.用Z-扫描法测定该化合物在DMF溶液中的三阶非线性光学性质,发现它具有自聚焦效应,三阶非线性折射系数n2=9.52×10-19m2@W-1,非线性极化率x(3)=3.41×10-12esu.A supramolecular [Mn(NCS)(2)(H2O)(2)(HMTA)(2)][Mn(NCS)(2)(H2O)(4)](H2O)(2) Was synthesized by the reaction of MnSO4.H2O and KSCN with hexamethylene-tetramine (HMTA). The results of single-crystal X-ray diffraction reveal that the compound consists of [Mn(NCS)(2)(H2O)(2)(HMTA)(2)], [Mn(NCS)(2)(H20)(4)] and H2O. One N atom of each HMTA coordinates to Mn atom, other three N atoms form hydrogen bonds with [Mn(NCS)(2)(H2O)(4)] and H2O. [Mn(NCS)(2)(H2O)(2)(HMTA)(2)], [Mn(NCS)(2)(H2O)(4)] and H2O form seven kinds of hydrogen bonds to lead a supramolecule of three-dimensional structure. Its third-order nonlinear optical properties were determined in DMF solution. The n(2) and chi ((3)) were measured to be 9.52 x 10(-19) m(2). W-1 and 3.41 x 10(-12) esu, respectively.

关 键 词：超分子化合物 制备 晶体结构 非线性光学性质 锰 

分 类 号：O614.711[理学—无机化学] O641.3[理学—化学]