论文部分内容阅读
发光聚合物一般是由具有大π电子系统的共轭基元作为发光单元,通过共价键连接而成的高分子.近年来,研究者发现:另一类仅含有脂肪胺、羰基、酯基、酰胺等传统意义上的助色团的聚合物在适当条件下也能发射强的荧光.树枝状聚酰胺胺(PAMAM)和超支化聚酰胺胺(hb-PAMAM)是最早和最广泛被研究的含非典型性荧光生色团的聚合物.最近,这类聚合物被扩展到含有叔胺基元的聚氨酯、聚醚酰胺、聚脲体系.这些体系的生色团被认定为其结构中的叔胺基元,叔胺的氧化是荧光产生的根源.同时,也有文献报道马来酸酐与醋酸乙烯酯交替共聚物、异丁烯与顺丁烯二酸酐共聚物、聚多糖动态高分子、聚酰腙以及通过RAFT试剂制备的含聚三硫碳酸酯的多嵌段共聚物等也可以发射荧光.这些聚合物的一个共同特点是结构中不含叔胺基元,而仅含羰基和酯基,其发光机理通常用多个羰基聚集效应或羰基和苯环之间的相互作用来解释.
In recent years, the researchers found that the other kind of polymers containing only aliphatic amines, carbonyl groups, ester groups , Amide and other traditional sense of the color group of the polymer under the appropriate conditions can emit strong fluorescence dendritic polyamide amine (PAMAM) and hyperbranched polyamide amine (hb-PAMAM) is the earliest and most widely studied Of polymers containing atypical fluorescent chromophores, which have recently been extended to polyurethanes, polyetheramides, and polyurea systems containing tertiary amine motifs.The chromophores of these systems are identified as being in their structure Of the tertiary amine, tertiary amine oxidation is the source of fluorescence generation.At the same time, there are also reports of alternating maleic anhydride and vinyl acetate copolymer, isobutylene and maleic anhydride copolymer, polysaccharide dynamic polymer, poly Hydrazones and multi-block copolymers containing polytrithiocarbonates prepared by RAFT agents, etc. One of the common features of these polymers is that the structure contains no tertiary amine groups but only carbonyl groups and ester groups, Its light-emitting mechanism usually uses multiple carbonyls Base aggregation effect or the interaction between carbonyl and benzene rings.