2026-05-04T23:17:10Z https://www.eurjchem.com/index.php/eurjchem/oai

oai:ojs.www.eurjchem.com:article/2533 2024-06-30T08:00:51Z eurjchem:ART driver

Exploring solvatochromism in Nile Blue 690 dye: Evaluating dipole moments across the ground and excited states Hirematada, Darukaswamy Tulahalli Patil, Mallikarjun Kalagouda Inamdar, Sanjeev Ramchandra Goudar, Kotresh Mare Nile blue 690 Dipole moment Solvatochromism Bakhshiev correlation technique Lippert-Mataga correlation technique Kawski-Chamma-Viallet correlation technique This study investigates the photophysical properties of Nile Blue 690 (NB-690) dye using spectroscopic techniques. Absorption and fluorescence spectroscopy were used to analyze NB-690, revealing pronounced bathochromic shifts in both absorption and fluorescence spectra, indicative of the π → π* transition. The study focuses on estimating ground- and excited-state dipole moments of NB-690 through solvatochromic shifts in absorption and fluorescence spectra. Various computational methods, including the Bilot-Kawski approach for ground state dipole moment computation, and the Reichardt correlation, the Bakhshiev, the Lippert-Mataga, and the Kawski-Chamma-Viallet methods for calculating the excited state dipole moment, were utilized. The results demonstrate excited-state dipole moment values of 6.922, 5.529, 5.529, 5.529, and 4.615 D, respectively, using the Lippert-Mataga, Bakhshiev, Kawski-Chamma-Viallet and solvent polarity correlation approaches. Significantly, the excited state dipole moment surpasses the ground state dipole moment, attributed to the significant π-electron density redistribution upon excitation. Intriguingly, both excited- and ground-state dipole moments align parallel to each other at a 0° angle. In general, these findings underscore the potential utility of NB-690 in optoelectronic applications, highlighting its responsiveness to environmental signals and providing valuable information for further exploration in the field. Atlanta Publishing House LLC 2024-06-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.eurjchem.com/index.php/eurjchem/article/view/2533 10.5155/eurjchem.15.2.178-185.2533 European Journal of Chemistry; Vol. 15 No. 2 (2024): June 2024; 178-185 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/2533/2797 Copyright (c) 2024 Darukaswamy Tulahalli Hirematada, Mallikarjun Kalagouda Patil, Sanjeev Ramchandra Inamdar, Kotresh Mare Goudar https://creativecommons.org/licenses/by-nc/4.0