On the R2PI spectrum of AgNH3:: a theoretical study of the quasidegeneracy of the first excited states

被引:13
作者
Archirel, P [1 ]
Dubois, V [1 ]
Maître, P [1 ]
机构
[1] Univ Paris Sud, Chim Phys Lab, F-91405 Orsay, France
关键词
D O I
10.1016/S0009-2614(00)00399-7
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 electronic ground state and the three first excited states of AgNH3 have been investigated theoretically. At the ab initio CASPT2 level, there isa quasi-degeneracy of the C-3v minima of the (2)A(1) and E-2 excited states (D-e = 1.38 and 1.40 eV, respectively). While the E-2 state displays a clear Ag(5p(pi)) + NH3 character, the nature of the (2)A(1) is more subtle, with both charge transfer and Rydberg characters. Semi-empirical introduction of the spin-orbit coupling enables the interpretation of a few features of the intricated R2PI spectrum. (C) 2000 Elsevier Science B.V. All rights reserved.
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页码:7 / 13
页数:7
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