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- W2022183072 abstract "Solvent effects play a vital role in various chemical, physical, and biological processes. To gain a fundamental understanding of the solute-solvent interactions and their implications on the energy level re-ordering and structure, UV-VIS absorption, resonance Raman spectroscopic, and density functional theory calculation studies on 9,10-phenanthrenequinone (PQ) in different solvents of diverse solvent polarity has been carried out. The solvatochromic analysis of the absorption spectra of PQ in protic dipolar solvents suggests that the longest (1n-π(1)*; S1 state) and the shorter (1π-π(1)*; S2 state) wavelength band undergoes a hypsochromic and bathochromic shift due to intermolecular hydrogen bond weakening and strengthening, respectively. It also indicates that hydrogen bonding plays a major role in the differential solvation of the S2 state relative to the ground state. Raman excitation profiles of PQ (400-1800 cm(-1)) in various solvents followed their corresponding absorption spectra therefore the enhancements on resonant excitation are from single-state rather than mixed states. The hyperchromism of the longer wavelength band is attributed to intensity borrowing from the nearby allowed electronic transition through vibronic coupling. Computational calculation with C2ν symmetry constraint on the S2 state resulted in an imaginary frequency along the low-frequency out-of-plane torsional modes involving the C=O site and therefore, we hypothesize that this mode could be involved in the vibronic coupling." @default.
- W2022183072 created "2016-06-24" @default.
- W2022183072 creator A5011769389 @default.
- W2022183072 creator A5029478842 @default.
- W2022183072 creator A5043444277 @default.
- W2022183072 date "2015-01-09" @default.
- W2022183072 modified "2023-10-10" @default.
- W2022183072 title "Solvatochromism of 9,10-phenanthrenequinone: An electronic and resonance Raman spectroscopic study" @default.
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- W2022183072 doi "https://doi.org/10.1063/1.4905126" @default.
- W2022183072 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25591351" @default.
- W2022183072 hasPublicationYear "2015" @default.
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