The g-factor anisotropy of plant chlorophyll a•

被引：29

作者：

Bratt, PJ

Poluektov, OG

Thurnauer, MC

Krzystek, J

Brunel, LC

Schrier, J

Hsiao, YW

Zerner, M

Angerhofer, A

机构：

[1] Univ Florida, Dept Chem, Gainesville, FL 32611 USA

[2] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA

[3] Florida State Univ, Natl High Magnet Field Lab, Ctr Interdisciplinary Magnet Resonance, Tallahassee, FL 32310 USA

[4] St Peters Coll, Dept Chem, Jersey City, NJ 07306 USA

[5] Univ Florida, Quantum Theory Project, Gainesville, FL 32611 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 30期

关键词：

D O I：

10.1021/jp001126l

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：

High-field EPR experiments at 12 T/330 GHz were performed on chlorophyll a radical cations in methylene chloride at low temperatures. Using fully deuterated chlorophyll it was possible to obtain the principal components of the rhombic g-tensor as g(alpha) = 2.00329 +/- (5 x 10(-5)), g(beta) = 2.00275 +/- (8 x 10(-5)), and g(gamma) = 2.00220 +/- (8 x 10(-5)). Protonated chlorophyll radicals did not give enough spectral resolution to yield the g-anisotropy from the EPR spectrum. This was true even at higher field/frequency combinations up to 24 T/670 GHz, Semiempirical calculations were performed using the INDO/S method (ZINDO) which yielded good agreement with the experimental data.

引用

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页码：6973 / 6977

页数：5

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