Effect of electron withdrawing groups on near infrared absorption of quinaldine-based squaraine dyes

被引：0
作者：
Puyad, Avinash L. [1 ]
Chaitanya, G. Krishna [1 ]
Karve, S. S. [1 ]
Deosarkar, S. D. [1 ]
机构：
[1] Swami Ramanand Teerth Marathwada Univ, Sch Chem Sci, Nanded 431606, MS, India
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2015年 / 89卷 / 06期
关键词：
quinaldinium salt; squaraine dye; near infrared absorption; NONLINEAR-OPTICAL PROPERTIES; CROCONATE DYES; 2ND HYPERPOLARIZABILITY; OXYALLYL DERIVATIVES; ENERGY; NIR; RED; BIOMOLECULES; SQUARYLIUM; CANDIDATE;
D O I：
10.1134/S0036024415060047
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The quinaldinium salt possessing electron withdrawing (-COOEt) groups was condensed with squaric acid giving the quinaldine based symmetrical squaraine dye. Effect of electron withdrawing group on near infrared absorption of the squaraine dye has been studied. Results showed that electron withdrawing group shifts bathochromically the absorption wavelength of squaraine dye by 31 nm when compared with the unsubstituted dye. Computational studies were performed in order to understand the charge transfer and red shift and later have been attributed to the increased biradicaloid character.
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页码：1087 / 1090
页数：4
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