Effect of conjugation on the optoelectronic properties of pyrazine-based push-pull chromophores: Aggregation-induced emission, solvatochromism, and acidochromism

被引：24

作者：

Park, Hyung-Ha ^{[1
]}

Meti, Puttavva ^{[1
]}

Gong, Young-Dae ^{[1
]}

机构：

[1] Dongguk Univ, Coll Sci, Innovat Drug Lib Res Ctr, Dept Chem, 26,3-Ga Pil Dong, Seoul 04620, South Korea

来源：

DYES AND PIGMENTS | 2021年 / 190卷

基金：

新加坡国家研究基金会;

关键词：

Pyrazine; Aggregation-induced emission; Charge transfer; Solvatochromism; FLUORESCENT ORGANIC NANOPARTICLES; OPTICAL-PROPERTIES; AIE; TETRAPHENYLETHENE; LUMINOGENS; SERIES; DYES;

D O I：

10.1016/j.dyepig.2021.109320

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of pyrazine-based bipodal D-?-A-?-D and D-?-A-?-A molecules with multi-stimuli response have been synthesized via Suzuki and Sonogashira cross-coupling reactions. We present a joint theoretical and experimental study to elucidate structure-property relationship of these push-pull chromophores. The modification of the endcapped donor-acceptor units and the extension of ?-conjugation are key factors in tuning their optical, thermal and electrochemical properties. Depending on the different electron-donating substituents, the chromophores emit blue to orange fluorescence. The solvent dependent emission was observed and their Dimroth-Reichardt plots show a linear correlation. The aggregation-induced study shows enhanced emission in aggregates. Our work has elucidated that these small structural isomers can be utilized to develop a promising multi-stimuli responsive fluorescent materials.

引用

页数：12

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