Simultaneous Detection of Two Triplets: A Time-Resolved Resonance Raman Study

Pandey, Rishikesh and Umapathy, Siva (2012) Simultaneous Detection of Two Triplets: A Time-Resolved Resonance Raman Study. In: JOURNAL OF PHYSICAL CHEMISTRY A, 116 (33). pp. 8484-8489.

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Abstract

Solvents are known to affect the triplet state structure and reactivity. In this paper, we have employed time-resolved resonance Raman (TR3) spectroscopy to understand solvent-induced subtle structural changes in the lowest excited triplet state of thioxanthone. Density functional theory (DFT) combined with the self-consistent reaction field (SCRF) implicit solvation model has been used to calculate the vibrational frequencies in the solvents. Here, we report a unique observation of the coexistence of two triplets, which has been substantiated by the probe wavelength-dependent Raman experiments. The coexistence of two triplets has been further supported by photoreduction experiments carried out at various temperatures.

Item Type:	Journal Article
Publication:	JOURNAL OF PHYSICAL CHEMISTRY A
Publisher:	AMER CHEMICAL SOC
Additional Information:	Copy right for this article belongs to American Chemical Society, USA
Keywords:	LASER FLASH-PHOTOLYSIS;SOLVENT POLARITY;EXCITED-STATE; PHOTOPHYSICAL PROPERTIES;ABSORPTION-SPECTRA;THIOXANTHONE; PHOTOCHEMISTRY;SPECTROSCOPY;DEPENDENCE;XANTHONE
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	04 Oct 2012 12:33
Last Modified:	04 Oct 2012 12:33
URI:	http://eprints.iisc.ac.in/id/eprint/45083

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