摘要
采用耦合微扰(CPHF)方法在HF/6-31G水平上对巴比妥酸衍生物的第一超极化率和分子前线轨道性质进行了计算.研究结果表明,给体结构与共轭链长度对第一超极化率β影响较大,而受体结构对分子第一超极化率的影响很小,并且分子第一超极化率与分子前线轨道HOMO与LUMO的能级差ΔEHL呈较好的线性关系.
The first hyperpolarizabili derivatives are studied at HF/6-31G leve shown that the first hyperpolarizability fl ty and molecular frontier orbit properties of barbituric acid 1 by coupled perturbed Hartree-Fock(CPHF) method. It is of barbituric acid deviratives strongly depends on the donor structure and the length of conjugate chain, but is not sensitive to the acceptor structure. The HOMOLUMO calculations reveal that the first hyperpolarizabilities of barbituric acid deviratives are linear to the HOMO-LUMO energy gap △EHL.
出处
《徐州师范大学学报(自然科学版)》
CAS
2007年第1期46-49,共4页
Journal of Xuzhou Normal University(Natural Science Edition)
基金
国家教育部留学归国人员实验室建设基金资助项目(2003624)
关键词
非线性光学
巴比妥酸
第一超极化率
分子前线轨道
nonlinear optics
barbituric acid
first hyperpolarizability
molecular frontier orbit