Study on New Quinacridone Derivatives with Enhanced Third-Order Nonlinear Optical Properties
Tetrahedron(2020)
Abstract
Seven new quinacridone derivatives were designed and synthesized. The relationship between molecular structure and nonlinear optical properties was studied by cyclic voltammetry, DFT calculation and Z-scan. By introducing strong electron donating groups at the two sides of the quinacridone, and then introducing a strong electron withdrawing group dicyanoethylene group, the band gap of the molecule can be effectively reduced, and the intramolecular charge transfer can be promoted. The results shown that the HOMO/LUMO band gaps of the target compounds are all reduced, and QA-F has the best third- order nonlinear optical performance, and its gamma (gamma = 5.32 x 10(-33) esu) is 4.38 times that of QA-1 (gamma = 1.21 x 10(-33) esu). (C) 2020 Elsevier Ltd. All rights reserved.
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Key words
Second-order hyperpolarizability,Quinacridone derivatives,NLO materials,Z-scan technology
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