Similarity transformed equation-of-motion coupled-cluster study of ionized, electron attached, and excited states of free base porphin

被引:145
作者
Nooijen, M
Bartlett, RJ
机构
[1] Quantum Theory Project, University of Florida, Gainesville
关键词
D O I
10.1063/1.473635
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 newly developed similarity transformed equation-of-motion coupled-cluster (STEOM-CC) method and its perturbative analog (STEOM-PT) are applied to obtain ionization potentials, electron affinities and singlet and triplet excitation energies of free base porphin. STEOM-CC results are found to agree nicely with the available experimental data. Ground-state correlation is not described adequately in lowest order of perturbation theory, although STEOM-PT results qualitatively agree with the infinite order STEOM-CC results. The STEOM computational strategy is operationally like CI singles for excited states, which leads to exceptional efficiency. (C) 1997 American Institute of Physics.
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页码:6449 / 6455
页数:7
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