ENDOR STUDY OF THE (7',7'-DICYANO)-7'-APO-BETA-CAROTENE AND (7'-PHENYL)-7'-APO-BETA-CAROTENE RADICAL CATIONS FORMED BY UV PHOTOLYSIS OF CAROTENOIDS ADSORBED ON SILICA-GEL

被引：14

作者：

PIEKARASADY, L

JEEVARAJAN, AS

KISPERT, LD

BRADFORD, EG

PLATO, M

机构：

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

[2] NICHOLS RES CORP, BIRMINGHAM, AL 35294 USA

[3] FREE UNIV BERLIN, INST MOLEK PHYS, W-1000 BERLIN, GERMANY

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1995年 / 91卷 / 17期

关键词：

D O I：

10.1039/ft9959102881

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 radical cations of two synthetic carotenoids, 7'-7'-dicyano-7'-apo-beta-carotene (I) and 7'-phenyl-7'-apo-B-carotene (ii), have been prepared by UV irradiation of samples adsorbed on silica gel. The methyl proton hyperfine coupling constants were deduced from ENDOR powder spectra and assigned by RHF-INDO/SP calculations. The powder EPR spectra of the carotenoid radical cations formed photolytically by electron transfer are unresolved, with a peak-to-peak linewidth of 15 +/- 1 G, irrespective of the donor or acceptor character of the terminal substituents.

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页码：2881 / 2884

页数：4

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