The Spectroscopy Characteristics and the Second-order Nonlinear Optical Properties of Novel Azobenzene Molecules with Push-pull Structures

Abstract

Abstract: In this paper, the spectroscopy characteristics and the second-order nonlinear op-tical properties of a series of push-pull chromorphores (R-HANB) based on 4'-bis (N, N-hydroxyethylene)imino-4-nitro azobenzene were studied.R-HANBwere classified as pseu-do-stilbene type molecules, which possess ultrafast photoresponsive time scale.The intensi-ties of the second-order harmonic generation of R-HANBpowder were mostly in the intensehigher than that of Disperse Red 1, while their composite values of first hyperpolarlizabilitiesand ground state permanent dipole monents were in the order of >3.4×10^-82 C²m⁴/V².Thesecond harmonic coefficients for the poled R-HANB-doped PMMAfilms were in the orderof >7.2×10^-19 ⁴/V.The variation of these properties of R-HANBwas explained well bythe electron and steric effects of substituents.

Key words: 4'-Bis (N,N-hydroxyethylene) imino-4-nitroazobeneze, Spectroscopy, Secondorder harmonic generation of powder, Second harmonic coefficients

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YAN Xing-Zhong, XU Zhi-Ling, LUO Ting, YANG Pei-Qing, CAI Zhi-Gang. The Spectroscopy Characteristics and the Second-order Nonlinear Optical Properties of Novel Azobenzene Molecules with Push-pull Structures[J]. Chem. J. Chinese Universities, 1997, 18(4): 554.

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The Spectroscopy Characteristics and the Second-order Nonlinear Optical Properties of Novel Azobenzene Molecules with Push-pull Structures

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