Substituent-Induced Aggregated State Electrochemiluminescence of Tetraphenylethene Derivatives

被引：74

作者：

Han, Zhengang ^{[1
]}

Zhang, Yinpan ^{[1
]}

Wu, Yanxia ^{[1
]}

Li, Zhimin ^{[1
]}

Bai, Lei ^{[1
]}

Huo, Shuhui ^{[1
]}

Lu, Xiaoquan ^{[1
,2
]}

机构：

[1] Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Bioelectrochem & Environm Anal Gansu Prov, Lanzhou 730070, Gansu, Peoples R China

[2] Tianjin Univ, Dept Chem, Tianjin Key Lab Mol Optoelect, Tianjin 300072, Peoples R China

来源：

ANALYTICAL CHEMISTRY | 2019年 / 91卷 / 13期

关键词：

INDUCED EMISSION; IODIDE; AIE; FLUORESCENCE; CHEMOSENSOR; LUMINOGENS; SENSOR; PROBE; CORE;

D O I：

10.1021/acs.analchem.9b02357

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The development of highly active, eco-friendly, and structurely fine-tunable organic luminophores is currently desirable for electrochemiluminescence (ECL). Tetraphenylethene (TPE) derivatives are the most representative aggregation-induced emission characteristic (AIEgens). In contrast, their aggregation-induced ECLs have not been detail studied. Herein, we report the bright cathodic aggregated state ECL of TPE derivatives by a coreactant approach. In this system, the substituents profoundly affect ECL emissions by changing the relative intensities of R and B band intensity ratios in their UV-vis spectra as well as the HOMO and LUMO energies. It was discovered that electron-withdrawing nitro-substituted TPE-(NO2)(4) with a smaller LUMO/HOMO band gap and stronger R band featured the strongest ECL emissions and became the best luminophore for the highly efficient detection of iodide (I-) in the aqueous phase. This work not only reveals the influence of R and B bands in TPE derivative UV-vis spectra on their optical properties but also constructs a novel aggregation-induced ECL sensing.

引用

页码：8676 / 8682

页数：7

共 46 条

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