SPIN-POLARIZED AND SITE-SELECTIVE X-RAY-ABSORPTION - DEMONSTRATION WITH FE PORPHYRINS AND K-BETA DETECTION

被引：24

作者：

WANG, X ^{[1
]}

RANDALL, CR ^{[1
]}

PENG, G ^{[1
]}

CRAMER, SP ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720

来源：

CHEMICAL PHYSICS LETTERS | 1995年 / 243卷 / 5-6期

基金：

美国国家卫生研究院;

关键词：

D O I：

10.1016/0009-2614(95)00827-Q

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-spin and low-spin Fe(III) porphyrins were studied by high resolution X-ray fluorescence and fluorescence-detected X-ray absorption spectroscopy using synchrotron radiation. The high-spin K beta spectrum is split into a main peak (K beta(1,3)) and a satellite (K beta') at 15 eV lower energy. The low-spin K beta(1,3) peak shifted approximate to 0.7 eV to lower energy, and the K beta' feature is almost unobservable. Ligand field multiplet calculations show that spin-up ((5)A(1)) and spin-down ((7)A(1)) states are separated for the high-spin spectrum. Spin polarization of the K beta-detected absorption was demonstrated by enhancement or elimination of the Is --> 3d transition, depending on the K beta region used for detection.

引用

页码：469 / 473

页数：5

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