Abstract:
:Exploration of environmental dynamics using intrinsic biological probe tryptophan is very important; however, it suffers from various difficulties. An alternative probe, kynurenine (KN), has been found to be an efficient probe for the ultrafast dynamics in the biological environment (Goswami et al., [2010] J. Phys. Chem. B., 114, 15236-15243). In the present study, we have investigated the efficacy of KN for the exploration of relatively slower dynamics of biologically relevant environments. A detailed investigation involving UV-Vis, steady-state/time-resolved fluorescence spectroscopy and Förster resonance energy transfer (FRET) studies on KN compared to a well-known solvation probe, H33258, a DNA-minor groove binder in a model nonionic reverse micelle reveals that ultrafast internal conversion associated with the hydrogen-bonding dynamics masks KN to become a dynamical reporter of the immediate environments of the probe.
journal_name
Photochem Photobioljournal_title
Photochemistry and photobiologyauthors
Rakshit S,Goswami N,Pal SKdoi
10.1111/j.1751-1097.2011.01007.xsubject
Has Abstractpub_date
2012-01-01 00:00:00pages
38-45issue
1eissn
0031-8655issn
1751-1097journal_volume
88pub_type
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