以咔唑为给体的分子内电荷转移化合物的自组装及发光性质  

Self-assembly and Luminescence Properties of Intramolecular Charge Transfer Compound of Carbazole Derivatives

作　　者：陈松华 陈欣 刘永琦 何美云 付珊珊 彭丽 杨纪恩[3] CHEN Songhua;CHEN Xin;LIU Yongqi;HE Meiyun;FU Shanshan;PENG Li;YANG Jien(College of Chemistry and Material,Longyan University,Longyan,Fujian 364000,China;National Science Library,Chinese Academy of Sciences,Beijing 100190,China;School of Materials Science and Engineering,Henan Normal University,Xinxiang,Henan 453007,China)

机构地区：[1]龙岩学院化学与材料学院,福建龙岩364000 [2]国家科学图书馆,北京100190 [3]河南师范大学材料科学与工程学院,河南新乡453007

出　　处：《应用化学》2020年第9期1022-1029,共8页Chinese Journal of Applied Chemistry

基　　金：龙岩学院博士启动经费(LB2018016);龙岩市科技计划项目(2018LYF8007)项目;河南省科技攻关项目(192102210173)资助。

摘　　要：设计合成了两种以咔唑为给体单元,苯并噻二唑为受体单元的分子内电荷转移化合物((E)-4-((4-(4-(9 H-咔唑-9-基)苯乙烯基)苯基)乙炔基)-7-溴苯[c][1,2,5]噻二唑(CzPB-Br)和4,7-双((4-((E)-4-(9 H-咔唑-9-基)苯乙烯基)苯基)乙炔基)苯[c][1,2,5]噻二唑(CzPBPCz))。研究了紫外、荧光等光物理性质,发现CzPB-Br和CzPBPCz的溶液态在可见区域404和442 nm有明显特征紫外可见吸收峰,同时在557和588 nm处有明显的荧光发射。结合理论计算考察了共轭长度对两种化合物性能的影响。两个化合物利用给-受分子间的偶极-偶极、π-π等相互作用,通过良溶剂向不良溶剂扩散和热饱和溶液析出的自组装方法,分别获得了一维微米线、多边形微米片等聚集态结构。其中,一维的微米线宽度为1~2μm,长度可达100μm以上。一维微米线和多边形微米片分别在515和568 nm处显示出了较强的发光,同时还显示出了光波导的特征,为获得高性能低维有机光电纳米材料提供了新思路。In order to study the optical properties of intramolecular charge transfer compounds of small organic molecular systems with donor-acceptor structure,two kinds ofπ-conjugated intramolecular charge transfer(ICT)derivatives((E)-4-((4-(4-(9 H-carbazol-9-yl)styryl)phenyl)ethynyl)-7-bromobenzo[c][1,2,5]thiadiazole(CzPB-Br)and 4,7-bis((4-((E)-4-(9 H-carbazol-9-yl)styryl)phenyl)ethynyl)benzo[c][1,2,5]thiadiazole(CzPBPCz))were synthesized,where the donor part consists of carbazole unit,while benzothiadiazole works as the acceptor.The influence of different conjugated groups on the structure and photophysical properties were studided by ultraviolet-visible(UV-Vis)spectra,fluorescence spectra and theoretical calculations.CzPB-Br and CzPBPCz have characteristic UV-Vis absorption peaks at 404 and 442 nm in CH2Cl2,respectively,with the maximum fluorescence wavelengths at 557 and 588 nm,respectively.The well-defined one-dimensional microrods and polygonal micron plates in large quantities and with high morphological purity are successfully fabricated adopting a phase transfer methodology and precipitation of hot saturated solution,exhibiting green and yellow emission respectively(emission maximum centered at 515 and 568 nm).The length of one-dimensional microrod is more than 100μm with the width of 1~2μm.Meanwhile,these assembles show a typical characteristics of waveguiding behavior,endowing potential applications in the field of optical devices.

关 键 词：咔唑 苯并噻二唑 聚集态 自组装 固态发光 

分 类 号：O641.3[理学—物理化学]