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Accession number;04A0258614
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| Title;Study on Extremely Strong Ability of Permethylated .BETA.-Cyclodextrin to Include meso-Arylporphyrins. |
| Author;
DOI RYOJI
(Doshisha Univ., Fac. of Eng.)
NISHIYABU RYUHEI
(Doshisha Univ., Fac. of Eng.)
KANO KOJI
(Doshisha Univ., Fac. of Eng.)
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Journal Title;Abstracts. Symposium on Biofunctional Chemistry
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Journal Code:L0836A
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ISSN:
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VOL.18th;NO.;PAGE.62-63(2003)
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| Figure&Table&Reference;FIG.2, TBL.2, REF.1 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Binding constants and thermodynamic parameters for 1:1 complexation of methylated .BETA.-cyclodextrins with 5,10,15-tris(3,5-dicarboxyphenyl)-20-phenylporphyrin have been determined in aqueous solution by means of titration microcalorimetry. The stability of a complex increases in the order .BETA.-CD (K=1.2*103 M-1)<2,6-DMe-.BETA.-CD (1.2*104 M-1)<TMe-.BETA.-CD (6.9*106 M-1)<2,3-DMe-.BETA.-CD (8.5*106 M-1). The formation of the methylatyed .BETA.-CD complexes are accompanied by the large and negative .DELTA.S and .DELTA.H. These thermodynamic parameters can be interpreted in terms of the strong van der Waals interactions between meso-arylporphyrins and methylatyed .BETA.-CDs. (author abst.) |
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