Investigation of tautomeric structures of thionin by satellite holes: matrix dependence
Resource
Chemical Physics Letters 302 (3-4): 347-353
Journal
Chemical Physics Letters
Pages
347-353
Date Issued
1999
Date
1999
Author(s)
Weng, Kevin C.
Chiang, Chien-Chih
Cheng, Ji-Yen
Cheng, Shao-Ying
Personov, Roman I.
Chang, Ta-Chau
Abstract
We have applied the satellite hole spectroscopy to study the tautomeric structures of thionin dye in glycerol:water glass. Slightly different frequencies (~15 cm-1) are observed for several satellite holes of thionin upon tuning the burning wavelength, implying that two conformational structures exist. However, only one set of satellite holes occurring in the spectrum of thionin doped in polyvinyl butyral film allows us to investigate the tautomeric structures of thionin in different matrices. Our results suggest that the appearance of two tautomeric structures of thionin in glycerol:water glass is due to the proton exchange between different sites of thionin and the matrix through intermolecular hydrogen bond.
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Type
journal article
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