Anion-regulated transient and persistent phosphorescence and size-dependent ultralong afterglow of organic ionic crystals

被引：37

作者：

Chen, Guilin ^{[1
]}

Guo, Sidan ^{[1
]}

Feng, Hui ^{[1
]}

Qian, Zhaosheng ^{[2
]}

机构：

[1] Zhejiang Normal Univ, Coll Chem & Life Sci, Yingbin Rd 688, Jinhua 321004, Zhejiang, Peoples R China

[2] Zhejiang Normal Univ, Key Lab, Minist Educ Adv Catalysis Mat, Yingbin Rd 688, Jinhua 321004, Zhejiang, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2019年 / 7卷 / 46期

基金：

中国国家自然科学基金;

关键词：

ROOM-TEMPERATURE PHOSPHORESCENCE; DUAL-EMISSION; PHOTOLUMINESCENCE; LIFETIME; COMPLEX; BRIGHT;

D O I：

10.1039/c9tc04951g

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is a formidable challenge to achieve highly efficient organic afterglow and readily tunable transient and persistent phosphorescence of organic materials because of the lack of valid design principles. Herein, we report the regulation of the transient and persistent room-temperature phosphorescence of organic ionic crystals by the alteration of anions, and the unique size-dependent ultralong afterglow of tetraphenylphosphonium perchlorate (TPP ClO4) crystals under ambient conditions. Three organic ionic crystals show sharply distinct triplet emissions based on three heavy-atom free anions by proper construction of donor-acceptor patterns in the crystals. TPP ClO4 crystals exhibit ultrabright transient phosphorescence and ultralong afterglow, and the gradual enhancement of the afterglow with the crystal size directly proves the generation of ultralong afterglow from aggregates with strong intermolecular interactions in the crystals. These results greatly contribute to the general design principles of highly efficient transient and persistent phosphorescence and their regulations by rational design. Highly sensitive detection and imaging of perchlorate ions are achieved in a phosphorescence turn-on manner based on the bright room-temperature phosphorescence of TPP ClO4 crystals, and valuable anti-counterfeiting applications of the ultralong afterglow of TPP ClO4 crystals are also demonstrated in practical examples.

引用

页码：14535 / 14542

页数：8

共 54 条

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