Solvent effect on the thermochromism of new betaine dyes

被引：11

作者：

Kumar, Rangaraju Satish ^{[1
]}

Jeong, Jaemyeng ^{[1
]}

Mergu, Naveen ^{[1
]}

Oh, Wooram ^{[1
]}

Son, Young-A. ^{[1
]}

机构：

[1] Chungnam Natl Univ, Dept Adv Organ Mat Engn, 220 Gung Dong, Daejeon 305764, South Korea

来源：

DYES AND PIGMENTS | 2017年 / 136卷

基金：

新加坡国家研究基金会;

关键词：

Thermochromism; Betaines; Aminophenol; Hypsochromic; Reversible; SPECTROSCOPIC PROPERTIES; THERMO-SOLVATOCHROMISM; ABSORPTION-SPECTRUM; TEMPERATURE; BEHAVIOR; PHENOL; CHAIN; GELS; 1ST;

D O I：

10.1016/j.dyepig.2016.08.034

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In the present study, five betaine dyes, BT1, BT2, BT3, BT4 and BT5 were successfully synthesized and fully characterized by H-1 NMR, C-13 NMR, ESI-MS, IR and UV-Visible spectroscopy. Except BT5, remaining betaine dyes are newly synthesized. The reversible thermochromic properties of these dyes were investigated at different temperatures in different solvents. The large thermochromic effect was observed for the dyes and it was attributed to a combination of conformational changes coupled with the relative permittivity of the respective solvent. The thermochromic properties of the betaines were evaluated by UV-Vis studies, and DFT calculations were conducted to rationalize the dye structures. Finally this is the first attempt of the study of color changes in numerous solvents at different temperatures. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：458 / 466

页数：9

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