ItemArticle

Photoisomerization Dynamics of 2-[(E)-(4-fluorophenyl)diazenyl]- 1H-imidazole: A Theoretical and Experimental Insight

Title
Photoisomerization Dynamics of 2-[(E)-(4-fluorophenyl)diazenyl]- 1H-imidazole: A Theoretical and Experimental Insight
Creator
John, Athira Maria; Xavier, Sebin Sebastian; Benny, Cyril; Philip, Reji; Balakrishnan, Sreeja Puthanveetil
Description
This study investigates the photoresponsive behavior of substituted azobenzenes with a specific focus on their nonlinear optical response. This study suggests that azoimidazole substitution is a better alternative to azobenzene derivatives for nonlinear optical responses. The synthesis, characterization, photophysical property and isomerization pathway of 2-[(E)-(4-fluorophenyl)diazenyl]-1H-imidazole (E-2g) are presented as an optical limiter through a comprehensive blend of experimental and theoretical approaches. Notably, E-2g exhibited a lower energy barrier than reported azobenzenes. The trans-to-cis photostationary state was reached in 75 min, while the cis-to-trans state was achieved in 60 min at 354 nm. The study further explores the photoisomerization pathway of E-2g, highlighting its nonlinear absorption, which has a nonlinear absorption coefficient (?eff) of 8.8 10?11 m/W at 20 ?J, as determined by Z-scan measurements. The results suggest that E-2g exhibits significant nonlinear absorption characteristics, which helps in applications requiring protection from intense light sources. This study explores the photoresponsive behavior of substituted azobenzenes derivative, azoimidazole, over unsubstituted azobenzene derivatives for nonlinear optical properties. Through experimental and theoretical analyses, the title compound was synthesized, characterized, and shown to have a lower energy barrier and efficient photoisomerization in solution. Its strong nonlinear absorption properties make it a promising candidate for optical limiting applications, such as eye protection and safeguarding sensitive optical sensors. 2025 World Scientific Publishing Company.
Source
Journal of Computational Biophysics and Chemistry;Volume;24;Issue;4;pp.521-533
Date
01-01-2025
Publisher
World Scientific
Subject
Azoimidazole; nonlinear optics; optical limiters; photoisomerization; TD-DFT
Coverage
John A.M., Department of Chemistry, School of Sciences, Christ University, Central Campus, Karnataka, Bengaluru, 560029, India; Xavier S.S., Light and Matter Physics Group, Raman Research Institute, C.V. Raman Avenue, Karnataka, Bangalore, 560080, India; Benny C., Light and Matter Physics Group, Raman Research Institute, C.V. Raman Avenue, Karnataka, Bangalore, 560080, India; Philip R., Light and Matter Physics Group, Raman Research Institute, C.V. Raman Avenue, Karnataka, Bangalore, 560080, India; Balakrishnan S.P., Department of Chemistry, School of Sciences, Christ University, Central Campus, Karnataka, Bengaluru, 560029, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 27374165;
Format
online
Language
English
Type
Article

Citation

John, Athira Maria; Xavier, Sebin Sebastian; Benny, Cyril; Philip, Reji; Balakrishnan, Sreeja Puthanveetil, “Photoisomerization Dynamics of 2-[(E)-(4-fluorophenyl)diazenyl]- 1H-imidazole: A Theoretical and Experimental Insight,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/23053.

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