一种新型树状大分子的合成及表征  

Synthesis and Characterization of a Novel Dendrimer

作　　者：郝利玲[1] 智慧[1] 刘文[1] 钟和良[1] 林培华[1] 李笃信[1] 董川[1] 

机构地区：[1]山西大学化学化工学院,山西太原030006

出　　处：《山西大学学报（自然科学版）》2009年第1期82-86,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(No.20875059)

摘　　要：采用发散合成法以乙二胺为中心核,丙烯酸甲酯为支化单体合成了2.0代的聚酰胺胺树状大分子(PAM-AM G2.0),然后与自制的N-乙基-3-甲酰基咔唑(简称EFCz)在60℃水浴中恒温反应48 h,得到了一种新型聚酰胺胺-(N-乙基咔唑-3-基)甲醛树状大分子(简称PAMAM G2.0-EFCz),用IR、1H NMR、UV/Vis谱和荧光光谱表征了中间体和目的物的分子结构,结果与设计一致.该树状大分子为红棕色黏稠状液体,能溶解于甲醇、乙醇和三氯甲烷,不溶于水、环己烷.对其荧光性质进行了研究,由于在大分子末端引入了咔唑端基功能团,使其荧光发射强度大大增强,最大发射波长从427 nm红移至487 nm.Polyamidoamine dendrimer of Generation 2.0 （for short PAMAM G2.0） was synthesized by divergent method with ethylenediamine as center core, methyl acrylate as branching monomer, and then a polyamidoamine-（N-ethyl carbazole-3-yl） formaldehyde （PAMAM G2.0-EFCz） dendrimer was prepared at 60 ℃ for 48 h with N-ethyl-3-formyl carbazole（EFCz） as terminating monomer. The composition and structures of intermediate and product were characterized by IR,1H NMR,UV/Vis spectrum and fluorescent spectrum . The dendrimer is umber sticky fluid and it is soluble in methanol, ethanol and chloroform but insoluble in water and cyclohexane. The fluorescent property of the dendrimer was studied. The fluorescent emission peak intensity is increased strongerly because the functional group of carbazole is introduced to the end of the dendrimer and a red shift from 427 nm to 487 nm of the fluorescent emission peak occurs at the same time.

关 键 词：聚酰胺胺-(N-乙基咔唑-3-基)甲醛 树状大分子 荧光 合成 N-乙基-3-甲酰基咔唑 

分 类 号：O621.3[理学—有机化学]