Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (3): 20210806.doi: 10.7503/cjcu20210806

• Physical Chemistry • Previous Articles     Next Articles

The Second Order Nonlinear Optical Properties of Azulene-defect Graphene Nanosheets with Full Armchair Edge

ZHENG Xuelian1,2, YANG Cuicui2, TIAN Weiquan2()   

  1. 1.College of Chemistry and Chemical Engineering,Mianyang Normal University,Mianyang 621000,China
    2.Chongqing Key Laboratory of Theoretical and Computational Chemistry,College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China
  • Received:2021-11-26 Online:2022-03-10 Published:2021-12-31
  • Contact: TIAN Weiquan E-mail:tianwq@cqu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21673025);the Open Projects of the State Key Laboratory of Supramolecular Structure and Materials(JLU), China(SKLSSM2021020);the Key Laboratory of Polyoxometalate and the Reticular Material Chemistry of Ministry of Education(NENU), China

Abstract:

Based on the graphene nanosheets(GNSs) with full armchair edge, the second order nonlinear optical properties of these GNSs in different shapes with good chemical stability were modulated by introducing two, three and four azulenes. The result shows that the number of azulene defects plays a dominant role in the second order nonlinear optical responses of these GNSs. The GNSs with four azulenes have large second order nonlinear optical responses, among which AP-4a has the largest static first hyperpolarizability(<β0>, 230387.70 a. u., 2260.42 a. u. per heavy atom). In addition, the nanosheet shape also has a certain effect. The azulene moieties not only induce charge distribution polarization of GNSs, but also dominate in the major electron transitions with important contribution to the nonlinear optical responses. Azulene as a functional unit of carbon-based nanomaterials significantly improves the photoelectric properties of carbon-based nanomaterials, and this finding provides practical strategies and useful information for future carbon-based nonlinear optical materials design.

Key words: Graphene nanosheets with full armchair edge, Azulene defect, Nanosheet shape, The second order nonlinear optical property, Functional unit

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