Kamath, Sudha D. ; Kartha, V. B. ; Mahato, K. K. (2008) Dynamics of L-tryptophan in aqueous solution by simultaneous laser induced fluorescence (LIF) and photoacoustic spectroscopy (PAS) Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 70 (1). pp. 187-194. ISSN 1386-1425
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S13861...
Related URL: http://dx.doi.org/10.1016/j.saa.2007.06.041
Abstract
An experimental system for measuring simultaneously photoacoustic (PA) and fluorescence signals is described. The simultaneous measurement of laser induced fluorescence and photoacoustic signals provide a suitable method for the study of different quenching phenomena occurring in fluorescent systems. In this paper we report tryptophan solvation dynamics in water using fluorescence and photoacoustic spectra recorded simultaneously by photoacoustic and fluorescence signals as functions of concentration, indicate that quantum yield is maximum at low concentrations. Also, the energy lost in the fluorescence path of tryptophan, due to different quenching phenomena like self quenching, Resonance energy transfer (RET), solvation relaxation, etc. is clearly seen from the photoacoustic signal intensity which increases as the fluorescence intensity decreases.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
Keywords: | L-Tryptophan; Photoacoustics; Fluorescence; Quantum Yield; Quenching |
ID Code: | 17857 |
Deposited On: | 16 Nov 2010 12:35 |
Last Modified: | 03 Jun 2011 10:16 |
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