AN ENDOR STUDY OF CAROTENOID CATION RADICALS ON SILICA-ALUMINA SOLID SUPPORTS

被引：45

作者：

JEEVARAJAN, AS ^{[1
]}

KISPERT, LD ^{[1
]}

PIEKARASADY, L ^{[1
]}

机构：

[1] UNIV ALABAMA,DEPT CHEM,TUSCALOOSA,AL 35487

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 209卷 / 03期

关键词：

D O I：

10.1016/0009-2614(93)80106-Y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The cation radicals of canthaxanthin, beta-carotene and 8'-apo-beta-caroten-8'-al were chemically prepared on activated silica-alumina solid supports. An ENDOR study of these cation radicals revealed the hyperfine coupling constants of the methyl protons and indicated a carotenoid-dependent orientation of the cation radicals bound to the solid support. The Lewis acidic sites of the solid support appear to be responsible for the chemical formation of the cation radicals and the Bronsted acidic sites are responsible for the stability of the cation radical produced on the support.

引用

页码：269 / 274

页数：6

共 23 条

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[Anonymous], [No title captured]

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