Crystal structure and dielectric property of supramolecular macrocyclic[(NDPA).(18-crown-6)]^(2+)·(DMA)^+·3ClO_4^-assemblies  

作　　者：Fang-Fang Wang Cheng Chen Yi Zhang Da-Wei Fu 

机构地区：[1]Ordered Matter Science Research Center,Southeast University

出　　处：《Chinese Chemical Letters》2015年第1期31-35,共5页中国化学快报（英文版）

基　　金：financially supported by the 973 Project(No. 2014CB848800);National Natural Science Foundation of China (Nos.21422101 and 21301029);Jiangsu Province NSF(Nos. BK20140056 and BK20130600);Program for NCET and Ph.D. Programs Foundation of Ministry of Education of China(No. 20130092120013)

摘　　要：One novel organic-inorganic hybrid supramolecular assemblies ｜（NDPA）（18-crown-6）]2＋（DMA）＋·3ClO4^-（1）,has been successfully constructed through the prominent strategies of crystal engineering（NDPA = N,N-dimethyI-1,4-phenylenediamine,DMA = dimethylamine）,and characterized by IR,powder XRD and single crystal X-ray diffraction.In the structure,the supramolecular organic cations and inorganic ClO_4^- anions are arranged alternately and linked by N-O…H hydrogen bonds.It is worthy to note that the ClO_4^- are linked to form one-dimensional inorganic chain through strong NH…O hydrogen bonds along b-axis.There is no distinct dielectric anomaly in the temperaturedependent and frequency-dependent dielectric constant curves,suggesting that no phase transition exists within the measured temperature range（120-420 K）.The relative displacement of cations and anions,the turned polarization of molecular electric moment and macrocyclic molecule rotator are the main factors to determine the trend of dielectric constant.One novel organic-inorganic hybrid supramolecular assemblies ｜（NDPA）（18-crown-6）]2＋（DMA）＋·3ClO4^-（1）,has been successfully constructed through the prominent strategies of crystal engineering（NDPA = N,N-dimethyI-1,4-phenylenediamine,DMA = dimethylamine）,and characterized by IR,powder XRD and single crystal X-ray diffraction.In the structure,the supramolecular organic cations and inorganic ClO_4^- anions are arranged alternately and linked by N-O…H hydrogen bonds.It is worthy to note that the ClO_4^- are linked to form one-dimensional inorganic chain through strong NH…O hydrogen bonds along b-axis.There is no distinct dielectric anomaly in the temperaturedependent and frequency-dependent dielectric constant curves,suggesting that no phase transition exists within the measured temperature range（120-420 K）.The relative displacement of cations and anions,the turned polarization of molecular electric moment and macrocyclic molecule rotator are the main factors to determine the trend of dielectric constant.

关 键 词：Organic-inorganic hybrid Dielectric constant Macrocyclic assembly Crystal structure 

分 类 号：O641.3[理学—物理化学]