Transient excited singlet state absorption in Rhodamine 6G

Venkateswarlu, Putcha ; George, M. C. ; Rao, Yerneni V. ; Jagannath, H. ; Chakrapani, G. ; Miahnahri, A. (1987) Transient excited singlet state absorption in Rhodamine 6G Pramana - Journal of Physics, 28 (1). pp. 59-71. ISSN 0304-4289

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Transient excited singlet state absorption (ESSA) has been studied in Rhodamine 6G in ethanol using a nitrogen laser and nitrogen laser-pumped dye laser. Broad absorption with several submaxima and possible shoulders, which represent the vibrational structure, has been observed in Rhodamine 6G in the region, 4175-4640 Å . The position of the lowest vibrational level of the first excited singlet state S 1 has been determined from the crossing point of the long and short wavelength spectral wings of absorption and fluorescence respectively. The energy level scheme of the molecule has been obtained with the help of the absorption and fluorescence spectra recorded. The observed structure in ESSA has been tentatively interpreted to be due to transitions from the different vibrational levels of S 1 to one or more vibrational levels of the upper singlet electronic state S4.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Rhodamine 6G; Excited Singlet State Absorption; Absorption Spectra; Fluorescence Spectra
ID Code:68606
Deposited On:08 Nov 2011 03:47
Last Modified:18 May 2016 15:21

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