Document Detail


Steady State and Time Resolved Fluorescence Study of Isoquinoline: Re-Investigation of Excited State Proton Transfer.
MedLine Citation:
PMID:  22690918     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In the present work we report some hitherto unnoticed features in the steady state and time resolved measurements of isoquinoline in water and trifluoroethanol (TFE). Absorption spectra reveal that in water, neutrals as well cationic species are present. Emission spectrum shows structured features at shorter wavelengths accompanied with a broad band around 375 nm, which correspond to neutrals and cations respectively. However, excitation spectra and time resolved data indicate that protonation does not take place in the excited state in water. On the contrary in stronger hydrogen bonding solvent TFE, continuous distribution of decay components is observed. This is ascribed to neutral and cation like species present in the ground as well as in the excited state. The difference in the results is explained in terms of different potential energy surfaces for water and TFE in the excited state.
Authors:
Hem Chandra Joshi; Neeraj Kumar Joshi; Richa Gahlaut; Neeraj Tewari; Ranjana Rautela; Sanjay Pant
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-12
Journal Detail:
Title:  The journal of physical chemistry. A     Volume:  -     ISSN:  1520-5215     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9890903     Medline TA:  J Phys Chem A     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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