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OPTICAL ABSORPTION SPECTRA OF (E)-2-(2-ARYL-1-CYANOVINYL)-4-CYCLOPROPYLTHIAZOLES

Abstract

The optical absorption spectra of (E)-2-(2-aryl-1-cyanovinyl)-4-cyclopropylthiazole derivatives, with different substituents in the para-position of the aryl ring, have been studied. The measurements were carried out in dimethylformamide solutions. It is shown that the acceptor substituents introduction leads to a bathochromic shift of absorption. This is explained by the fact that they promote the delocalization of electrons of unoccupied pairs of nitrogen and sulfur of the thiazole ring. Absorption bands in the range of 250—450 nm arise from HOMO→LUMO and HOMO-1→LUMO transitions. 

About the Authors

A. A. Tikhii
Lugansk State Pedagogical University
Russian Federation

Lugansk



I. V. Zhikharev
Galkin Donetsk Institute for Physics and Engineering
Russian Federation

Donetsk



V. D. Dyachenko
Lugansk State Pedagogical University
Russian Federation

Lugansk



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Review

For citations:


Tikhii A.A., Zhikharev I.V., Dyachenko V.D. OPTICAL ABSORPTION SPECTRA OF (E)-2-(2-ARYL-1-CYANOVINYL)-4-CYCLOPROPYLTHIAZOLES. Zhurnal Prikladnoii Spektroskopii. 2025;92(1):22-31. (In Russ.)

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ISSN 0514-7506 (Print)