COLOR AND CONSTITUTION RELATIONSHIPS IN CI ACID RED-138 AND ITS HOMOLOGS

被引：11

作者：

STOYANOV, S ^{[1
]}

IIJIMA, T ^{[1
]}

STOYANOVA, T ^{[1
]}

ANTONOV, L ^{[1
]}

机构：

[1] JISSEN WOMENS UNIV,DEPT TEXT SCI,TOKYO,JAPAN

来源：

DYES AND PIGMENTS | 1995年 / 27卷 / 03期

关键词：

D O I：

10.1016/0143-7208(94)00065-A

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The potentially tautomeric acid azo dye CI Acid Red 138 and its homologues substituted by different alkyl groups were investigated by UV-Vis and PPP-MO techniques. The calculated pi-electronic transition for the hydrazone form corresponds very closely to the experimental absorption spectrum. The observed negative solvatochromic effect is explained using the calculated dipole moments of the ground and first excited singlet states. The calculated transition moments are in opposite directions for both tautomeric structures, suggesting a specific substituent effect depending on which tautomeric form predominates. The observed low intensity fluorescence is assigned to the fluorescence ability of the hydrazone structure. The long wavelength band determining the colour is composed of discrete vibronic transitions, the relative intensities of which can change when particular chemical interactions between a dye molecule and its environment occur.

引用

页码：237 / 247

页数：11

共 26 条

[1] APPROACH FOR INCREASED INFORMATION FROM THE 2ND-DERIVATIVE SPECTRA IN UV-VIS ABSORPTION-SPECTROSCOPY [J].