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Effective Internal and External Modulation of Nontraditional Intrinsic Luminescence
Author(s) -
Lai Yueying,
Zhu Tianwen,
Geng Ting,
Zheng Shuyuan,
Yang Tianjia,
Zhao Zihao,
Xiao Guanjun,
Zou Bo,
Yuan Wang Zhang
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202005035
Subject(s) - luminescence , intramolecular force , phosphorescence , intermolecular force , materials science , modulation (music) , rational design , heteroatom , photochemistry , polymer , nanotechnology , optoelectronics , chemistry , fluorescence , stereochemistry , molecule , organic chemistry , optics , physics , ring (chemistry) , acoustics , composite material
The rational modulation of the nontraditional intrinsic luminescence (NTIL) of nonconventional luminophores remains difficult, on account of the limited understanding on the structure–property relationships and emission mechanisms. Herein, the effective modulation of NTIL is demonstrated based on a group of nonaromatic anhydrides and imides. Mutual bridging of isolated subgroups effectively promotes intramolecular through‐space conjugation (TSC), leading to red‐shifted emission, enhanced efficiency, and prolonged persistent room‐temperature phosphorescence (p‐RTP). The substitution of heteroatoms from oxygen to nitrogen drastically changes the TSC and enhances intermolecular interactions, resulting in enhanced emission efficiency. In addition, upon freezing, compression, or embedding into polymer matrices, the emission intensity and color remain well regulated. These results shed new light on the rational modulation of the NTIL and p‐RTP of nonconventional luminophores.