A ligand field model for MCD spectra of biological cupric complexes.
A ligand field model for MCD spectra of biological cupric complexes.
复制标题
生物铜配合物 MCD 光谱的配体场模型。
DOI:
10.1016/s0006-3495(95)79943-x
复制
发表时间:
1995
期刊:
影响因子:
--
通讯作者:
Whittaker,JW
中科院分区:
文献类型:
--
作者:
Landrum,GA;Ekberg,CA;Whittaker,JW
A ligand field calculation of magnetic circular dichroism (MCD) spectra is described that provides new insights into the information contained in electronic spectra of copper sites in metalloenzymes and synthetic analogs. The ligand field model uses metal-centered p- and f-orbitals to model sigma, pi LMCT mixing mechanism for intensity, allowing the basic features of optical absorption, MCD, and electron paramagnetic resonance spectra to be simultaneously computed from a single set of parameters and the crystallographically determined ligand coordinates. We have used the model to predict changes in spectra resulting from the transformation of electronic wavefunctions under systematic variation in geometry in pentacoordinate ML5 complexes. The effectiveness of the calculation is demonstrated for two synthetic copper model compounds and a galactose oxidase enzyme complex representing limiting coordination geometries. This analysis permits immediate recognition of characteristic patterns of MCD intensity and correlation with geometry. A complementarity principle between MCD and CD spectra of transition metal complexes is discussed.
登录
查看更多内容
影响因子:
1.7
作者:
P. Schatz;R. Mowery;E. Krausz
通讯作者:
E. Krausz
影响因子:
4.4
作者:
B. Gerstman;A. S. Brill
通讯作者:
A. S. Brill
DOI:
--
发表时间:
1980
期刊:
Annual Review of Biophysics and Bioengineering
影响因子:
--
作者:
J. Sutherland;B. Holmquist
通讯作者:
B. Holmquist
影响因子:
4.6
作者:
P. Stephens
通讯作者:
P. Stephens