On the influence of non-additive interactions on the optical properties of the selected subsystems of crystalline urea

被引:18
作者
Skwara, B [1 ]
Gora, RW [1 ]
Bartkowiak, W [1 ]
机构
[1] Wroclaw Univ Technol, Inst Phys & Theoret Chem, Dept Chem, PL-50370 Wroclaw, Poland
关键词
D O I
10.1016/j.cplett.2005.02.086
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 results of many-body analysis of the intermolecular interaction energy for the selected subsystems of the molecular crystal of urea are discussed. In particular, a great importance of cooperative effects in both, the interaction energy and linear and non-linear optical properties are considered. The nature of intermolecular interactions in the urea clusters is investigated applying the hybrid variational-perturbational interaction energy decomposition scheme. Molecular polarizabilities and first-order hyperpolarizabilities are estimated by means of a finite-field technique combined with the Hartree-Fock and the second-order Moller Plesset perturbation theories. The results of our calculations indicate a substantial influence of the many-body effects on the non-linear response of the studied hydrogen-bonded systems. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:29 / 37
页数:9
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