含有Pt―Pt键金属配合物的电子结构和二阶非线性光学性质

doi:10.3866/PKU.WHXB20110722

物理化学学报 >> 2011, Vol. 27 >> Issue (07): 1661-1665.doi: 10.3866/PKU.WHXB20110722

含有Pt―Pt键金属配合物的电子结构和二阶非线性光学性质

刘春光

东北电力大学化学工程学院, 吉林吉林 132012; 东北师范大学化学学院, 功能材料化学研究所, 长春 130024

收稿日期:2011-03-28 修回日期:2011-05-13 发布日期:2011-06-28
通讯作者: 刘春光 E-mail:liucg407@163.com
基金资助:
吉林省自然科学基金(20101544)资助项目

Electronic Structures and Second-Order Nonlinear Optical Properties of a Series of Pt―Pt Bond-Containing Metal Complexes

LIU Chun-Guang

College of Chemical Engineering, Northeast Dianli University, Jilin 132012, Jilin Province, P. R. China; Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China

Received:2011-03-28 Revised:2011-05-13 Published:2011-06-28
Contact: LIU Chun-Guang E-mail:liucg407@163.com
Supported by:
The project was supported by the Natural Science Foundation of Jilin Province, China (20101544).

摘要/Abstract

摘要：

采用量子化学密度泛函理论(DFT)结合有限场(FF)的方法对一系列含有Pt―Pt键金属配合物的电子结构和二阶非线性光学(NLO)性质进行了理论计算. 结果表明改变共轭配体对Pt―Pt键影响不大. 由配体到Pt―Pt金属基团的电荷转移强度随配体增长而变大. 金属配合物静态一阶超极化率随配体的增长而增大, 配合物电荷的改变基本不影响这类化合物的二阶NLO性质. 具有相对长的共轭配体的配合物IId具有最大的二阶NLO响应. 含时密度泛函理论(TD-DFT)计算表明配合物IId的二阶NLO响应来自于混有配体到金属的配体内的π→π^*电荷转移跃迁的贡献.

关键词: 密度泛函理论, 金属配合物, 非线性光学性质, 电子结构, 有限场方法

Abstract:

The electronic structures and second-order nonlinear optical (NLO) properties of a series of Pt―Pt bond-containing metal complexes were calculated using density factional theory (DFT) combined with the finite field (FF) method. The results show that the replacement of a conjugated ligand does not substantially affect the Pt―Pt bond. Additionally, the strength of charge transfer (CT) from the ligand to the metal group increases as the length of the conjugated ligand becomes longer. The first-order hyperpolarizabilities of these metal complexes increase as the length of the conjugated ligand becomes longer but this is not sensitive to the change in charge of these metal complexes. Complex IId containing a relevant long π-conjugated ligand possesses the largest first-order hyperpolarizability according to our DFT-FF calculations. Time-dependent (TD)-DFT calculations show that the π→π^* intraligand mixing metal to ligand charge transfer transitions directly contribute to the second-order NLO response of the Pt―Pt bond-containing metal complex IId.

Key words: Density functional theory, Metal complex, Nonlinear optical property, Electronic structure, Finite field method

MSC2000:

O641

刘春光. 含有Pt―Pt键金属配合物的电子结构和二阶非线性光学性质[J]. 物理化学学报, 2011, 27(07): 1661-1665.

LIU Chun-Guang. Electronic Structures and Second-Order Nonlinear Optical Properties of a Series of Pt―Pt Bond-Containing Metal Complexes[J]. Acta Phys. -Chim. Sin., 2011, 27(07): 1661-1665.

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含有Pt―Pt键金属配合物的电子结构和二阶非线性光学性质

Electronic Structures and Second-Order Nonlinear Optical Properties of a Series of Pt―Pt Bond-Containing Metal Complexes

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