✦ LIBER ✦

Estimation of the complexing parameters for intercalated and externally bound tetrakisporphine to the DNA molecule

✍ Scribed by Teresa Treszczanowicz; Johannes A. Koningstein

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 96 KB
Volume: 3
Category: Article
ISSN: 1075-4261
DOI: 10.1002/(sici)1520-6343(1997)3:6<445::aid-bspy3>3.0.co;2-#

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✦ Synopsis

The results of a temperature-dependent and time-dependent fluorescence intensity study of the emission of intercalated and externally bound tetrakis(4-Nmethylpyridyl)porphine are analyzed in terms of an association model. This analysis allows one to estimate differences in the enthalpies and entropies of complex formation for the intercalated and externally bound porphyrin-DNA systems. These results indicate that the externally bound porphyrin molecule is more strongly bound to the DNA molecule than is the intercalated porphyrin molecule.