Abstract
Solvatochromism is commonly used in many fields of chemical and biological research to study bulk and local polarity in macro systems (membranes, etc.), or even the conformation and binding of proteins. Despite its wide use, solvatochromism still remains a largely unknown phenomenon due to the extremely complex coupling of many different interactions and dynamical processes which characterize it. In this work the spectroscopic characterization of the Ru(acac)2(L) complex (1) [HL = N-(2-methylsulfonyl-phenyl)formamide] are presented. Gas- and solution-phase structural and electronic features of (acac)2Ru(L) have been investigated using density functional theory. The molecular structure underscores the flexibility of the formyl fragment in the metal complex. Time-dependent density functional theory has been used to investigate the excited states and solvatochromic properties of Ru(acac)2(L). The calculated vertical excitation energies in solution are consistent with the experimental data, showing that the ligand-to-metal charge-transfer transitions, in both the visible and UV regions, dominate over the ligand based π–π* transitions.
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ACKNOWLEDGMENTS
SC thanks Dr. Prosenjit Seal for his thoughtful inputs in carrying out the works and some valuable help. SC also thanks Scholar’s Press to give the permission to publish the data, mentioned in the book “Transition Metal Complex of Redox Non-Innocent N,S Mixed-Donor Ligand” published by the same author, in this article.
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Sudipta Chatterjee Solvatochromism of a Novel Ruthenium Complex, [Ru(acac)2(N-(2-Methylsulfonylphenyl)formamido)]: A Correlation between the Electronic Structure and Spectroscopic Properties. Russ. J. Phys. Chem. 94, 789–799 (2020). https://doi.org/10.1134/S0036024420040202
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DOI: https://doi.org/10.1134/S0036024420040202