Yellow and Orange-Red Room-Temperature Phosphorescence from Amorphous Nonaromatic Polymers

被引：12

作者：

Deng, Junwen ^{[1
]}

Bai, Yunhao ^{[1
]}

Li, Jingyun ^{[1
]}

Jiang, Junyao ^{[1
]}

Zhao, Chen ^{[1
]}

Xie, Wendi ^{[1
]}

Guo, Yidan ^{[1
]}

Liu, Haiqi ^{[1
]}

Liu, Deyu ^{[1
]}

Yu, Linxuan ^{[1
]}

Wang, Huiliang ^{[1
]}

机构：

[1] Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China

来源：

ADVANCED OPTICAL MATERIALS | 2023年 / 11卷 / 23期

基金：

中国国家自然科学基金;

关键词：

nonconventional chromophores; nontraditional luminogens; room-temperature phosphorescence; through-space charge transfer; CLUSTERING-TRIGGERED EMISSION; MOLECULAR-WEIGHT; PHOTOLUMINESCENCE; DENDRIMERS; ANHYDRIDE; STRATEGY;

D O I：

10.1002/adom.202300715

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Many nontraditional luminogens (NTLs) without any large & pi;-conjugated structures are reported to exhibit room-temperature phosphorescence (RTP). Unfortunately, the reported NTLs mostly emit blue or green RTP. Achieving more redshifted RTP from NTLs remains a great challenge. Herein, a series of nonaromatic polymers exhibiting yellow and orange-red RTP are reported. Poly(itaconic anhydride) (PITA) does not exhibit RTP, its hydrolyzed product poly(itaconic acid) (PITAc) exhibits weak yellow RTP, but the ionized product poly(sodium itaconate) (PITANa) can emit stronger and redshifted RTP. Moreover, the ionized copolymers poly(vinyl pyrrolidone-co-sodium itaconate) (PIVPNa) and poly(vinyl pyrrolidone-co-sodium maleate) (PMVPNa), the mixture of PITANa/poly(vinyl pyrrolidone) (PVP), and the full hydrolyzed product of poly(vinyl caprolactam-co-sodium itaconate) (PIVCNa) all exhibit strong orange-red RTP emissions at & AP;600 nm. Structural characterizations and theoretical calculations prove that hydrogen bonding and ionic bonds lead to the rigidification of polymer chain conformations, and more importantly, both intra- and interchain nonaromatic electron donor-acceptor (nDA) structures and hence through-space charge transfer are formed between carboxylate and lactam groups in proper conformations, which facilitates the occurrence and redshift of RTP in NTLs. This work provides a novel strategy to design NTLs with redshifted RTP and improves the understanding of the photoluminescence mechanism of NTLs.

引用

页数：8

共 55 条

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