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Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation

The photoinduced birefringence behaviors of host–guest systems based on heterocyclic thiazole–azo dyes with different substituents, dispersed into PMMA matrix, were investigated under three excitation wavelengths, i.e., 405 nm, 445 nm or 532 nm. The wavelengths fell on the blue side, near the maximu...

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Autores principales: Derkowska-Zielinska, Beata, Kozanecka-Szmigiel, Anna, Chomicki, Dariusz, Smokal, Vitaliy, Kawabe, Yutaka, Krupka, Oksana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9573466/
https://www.ncbi.nlm.nih.gov/pubmed/36235192
http://dx.doi.org/10.3390/molecules27196655
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author Derkowska-Zielinska, Beata
Kozanecka-Szmigiel, Anna
Chomicki, Dariusz
Smokal, Vitaliy
Kawabe, Yutaka
Krupka, Oksana
author_facet Derkowska-Zielinska, Beata
Kozanecka-Szmigiel, Anna
Chomicki, Dariusz
Smokal, Vitaliy
Kawabe, Yutaka
Krupka, Oksana
author_sort Derkowska-Zielinska, Beata
collection PubMed
description The photoinduced birefringence behaviors of host–guest systems based on heterocyclic thiazole–azo dyes with different substituents, dispersed into PMMA matrix, were investigated under three excitation wavelengths, i.e., 405 nm, 445 nm or 532 nm. The wavelengths fell on the blue side, near the maximum or on the red side of the absorption bands of trans-azo dyes, respectively. We found that photoinduced birefringence was generated at a similar extent in all studied systems, except the system containing a 2-methyl-5-benzothiazolyl as thiazole–azo dye substituent. For this material, the achieved birefringence value was the highest among the whole series, regardless of the excitation wavelength. Moreover, we identified the optimal irradiation wavelength for efficient birefringence generation and showed that large absorption of excitation light by trans isomer does not account for achieving a significant degree of molecular alignment. The obtained results indicate that thiazole–azo dye with a 2-methyl-5-benzothiazolyl substituent shows promising photoinduced birefringence, and can be considered a dye potentially suitable for optical applications.
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spelling pubmed-95734662022-10-17 Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation Derkowska-Zielinska, Beata Kozanecka-Szmigiel, Anna Chomicki, Dariusz Smokal, Vitaliy Kawabe, Yutaka Krupka, Oksana Molecules Article The photoinduced birefringence behaviors of host–guest systems based on heterocyclic thiazole–azo dyes with different substituents, dispersed into PMMA matrix, were investigated under three excitation wavelengths, i.e., 405 nm, 445 nm or 532 nm. The wavelengths fell on the blue side, near the maximum or on the red side of the absorption bands of trans-azo dyes, respectively. We found that photoinduced birefringence was generated at a similar extent in all studied systems, except the system containing a 2-methyl-5-benzothiazolyl as thiazole–azo dye substituent. For this material, the achieved birefringence value was the highest among the whole series, regardless of the excitation wavelength. Moreover, we identified the optimal irradiation wavelength for efficient birefringence generation and showed that large absorption of excitation light by trans isomer does not account for achieving a significant degree of molecular alignment. The obtained results indicate that thiazole–azo dye with a 2-methyl-5-benzothiazolyl substituent shows promising photoinduced birefringence, and can be considered a dye potentially suitable for optical applications. MDPI 2022-10-07 /pmc/articles/PMC9573466/ /pubmed/36235192 http://dx.doi.org/10.3390/molecules27196655 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Derkowska-Zielinska, Beata
Kozanecka-Szmigiel, Anna
Chomicki, Dariusz
Smokal, Vitaliy
Kawabe, Yutaka
Krupka, Oksana
Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation
title Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation
title_full Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation
title_fullStr Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation
title_full_unstemmed Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation
title_short Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation
title_sort effect of 2-methylthiazole group on photoinduced birefringence of thiazole-azo dye host–guest systems at different wavelengths of irradiation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9573466/
https://www.ncbi.nlm.nih.gov/pubmed/36235192
http://dx.doi.org/10.3390/molecules27196655
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