Aggregation induced emissive carbazole-based push pull NLOphores: Synthesis, photophysical properties and DFT studies

被引：52

作者：

Lanke, Sandip K. ^{[1
]}

Sekar, Nagaiyan ^{[1
]}

机构：

[1] Inst Chem Technol, Dept Dyestuff Technol, Bombay 400019, Maharashtra, India

来源：

DYES AND PIGMENTS | 2016年 / 124卷

关键词：

Aggregation induced emission; Photophysical properties; Twisted intramolecular charge transfer (TICT); Solvatochromism; Polarizability; Density functional theory (DFT); INTRAMOLECULAR CHARGE-TRANSFER; EXCITED-STATE; ENHANCED EMISSION; FLUORESCENT-PROBE; BIPOLAR HOST; DONOR; BLUE; DERIVATIVES; ABSORPTION; ACCEPTOR;

D O I：

10.1016/j.dyepig.2015.09.013

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

2-Alkoxy-9-methyl-9H-carbazole-3-carbaldehyde based push pull chromophore were efficiently synthesized by a multi-step reaction starting from 9H-carbazole-2-ol. The fluorescence properties of these D-pi-A chromophores were investigated in various solvents of varying polarities and in mixed solvent solutions of DMF and H2O. They exhibited low fluorescent intensity in solution but a high fluorescent intensity in aggregate forms and in their solid state due to the promising aggregation-induced emission enhancement characteristics. These dyes were fully characterized by FT-IR, H-1 NMR and HRMS spectra. The ratio of ground to excited state dipole moment of the novel push pull chromophore were calculated by Bakhshiev and Bilot-Kawski correlations. All the four dyes show more or less twisted intramolecular charge transfer (TILT) characteristics. They show a large first hyperpolarizability value ranging from 189-721 x 10(-3) esu by theoretical method and 73-330 x 10(-30) esu by experimental method. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：82 / 92

页数：11

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