Open AccessTheoretical study on the first hyperpolarizabilities of stilbene derivatives
Author(s) -
Lei Wang,
Huifang Hu,
Jianwei Wei,
Hongtao Zeng,
Yu Ying-Ying,
Zhiyong Wang,
Lijuan Zhang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.2987
Subject(s) - coplanarity , delocalized electron , intramolecular force , molecule , conjugated system , asymmetry , hyperpolarizability , materials science , homo/lumo , molecular orbital , computational chemistry , chemistry , stereochemistry , physics , polymer , organic chemistry , geometry , mathematics , quantum mechanics , polarizability , composite material
Static first hyperpolarizabilities of a series of stilbene derivatives are calculated at the CPHF/6-311G(d) level. the molecules which possess the electron push-pull pair and delocalized conjugated bridge structure have larger first hyperpolarizabilities because of the intramolecular charge transfer. The influence of position of the substitution, strength and number of donors and acceptors, and their coplanarity and asymmetry is discussed. The results indicate that the molecules may have larger first hyperpolarizabilities when the molecules have stronger and more donors and acceptors, large asymmetry of HOMO and LUMO, better coplanarity and higher accentricity. This work attemps at finding out the relationship between the structure and the property, thus providing theoretical basis for designing nonlinear optical molecules.