类胡萝卜素自由基阳离子和二价阳离子：电子顺磁共振、光学和电化学研究。

Carotenoid radical cations and dications: EPR, optical, and electrochemical studies.

作者信息

Kispert Lowell D, Konovalova Tatyana, Gao Yunlong

机构信息

Department of Chemistry, University of Alabama, Tuscaloosa, AL 35487-0336, USA.

出版信息

Arch Biochem Biophys. 2004 Oct 1;430(1):49-60. doi: 10.1016/j.abb.2004.03.036.

DOI:10.1016/j.abb.2004.03.036

PMID:15325911

Abstract

Investigations of the structure and properties of paramagnetic carotenoid radical cations and diamagnetic carotenoid dications using electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) spectroscopy in conjunction with electrochemical, optical, and HPLC measurements, and molecular orbital calculations are described. These methods were applied to determine how the carotenoid radical cations and dications can be formed, their electron-transfer properties and stability in various media, and the mechanism by which carotenoid radical cations can isomerize.

摘要

描述了使用电子顺磁共振（EPR）和电子-核双共振（ENDOR）光谱，并结合电化学、光学和高效液相色谱测量以及分子轨道计算，对顺磁性类胡萝卜素自由基阳离子和抗磁性类胡萝卜素二价阳离子的结构和性质进行的研究。这些方法被用于确定类胡萝卜素自由基阳离子和二价阳离子如何形成、它们在各种介质中的电子转移性质和稳定性，以及类胡萝卜素自由基阳离子异构化的机制。