Hyperbranching-Enhanced-Emission Effect Discovered in Hyperbranched Poly(4-(cyanomethyl)phenyl methacrylate)

被引：22
作者：
Fang, Laiping [1 ,2 ]
Huang, Chushu [1 ,2 ]
Shabir, Ghulam [3 ]
Liang, Jinlun [1 ,2 ]
Liu, Zhaoyang [1 ,2 ]
Zhang, Hefeng [1 ,2 ,4 ,5 ]
机构：
[1] Shantou Univ, Coll Sci, Dept Chem, Shantou 515063, Peoples R China
[2] Shantou Univ, Coll Sci, Key Lab Preparat & Applicat Ordered Struct Mat Gu, Shantou 515063, Peoples R China
[3] Shantou Univ, Med Coll, Dept Biochem & Mol Biol, Comprehensive Bldg,Xinling Rd 22, Shantou 515041, Peoples R China
[4] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
[5] Guangdong Prov Lab Chem & Fine Chem Engn, Shantou 515063, Peoples R China
来源：
ACS MACRO LETTERS | 2019年 / 8卷 / 12期
基金：
中国国家自然科学基金;
关键词：
AGGREGATION-INDUCED EMISSION; LIGHT-EMISSION; POLYMERIZATION; FLUORESCENCE; PERFORMANCE; DINITRILES; AIEGENS; ROUTE;
D O I：
10.1021/acsmacrolett.9b00864
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
To disclose the effect of architecture over fluorescence behaviors of polymers, linear and hyperbranched poly(4-(cyanomethyl)phenyl methacrylate)s (PCPMAs) were synthesized by using atom transfer radical polymerization (ATRP). Compared to linear PCPMAs with weakly AIE (AIE: aggregation-induced-emission) characteristics and small-molecule analogues of 4-(cyanomethyl)phenyl isobutyrate (CPB) with ACQ (ACQ: aggregation-caused-quenching) behaviors, hyperbranched PCPMA showed dramatically stronger fluorescence at both solution and solid states and more significant AIE characteristics, which were further enhanced by increasing the branching degree, indicating a significant hyperbranching-enhanced-emission effect (HEE). The HEE effect was attributed to the strong promotion of hyperbranched architecture over the formation of a nitrile group cluster with through-space conjugation (TSC). The HEE effect provided a promising methodology to construct efficient nontraditional fluorescent polymers without large-conjugated, rigid, and planar emitter groups.
引用
收藏
页码：1605 / 1610
页数：11
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