Photoelectric conversion and second-order optical nonlinearity of Langmuir–Blodgett films of a novel dipolar two-dimensional material

Fu-You Li; Jie Zheng; Lin-Pei Jin; Xin-Sheng Zhao; Ting-Ting Liu; Jian-Quan Guo

doi:10.1039/A908531I

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Fu-You Li,^a Jie Zheng,^b Lin-Pei Jin,*^a Xin-Sheng Zhao,^c Ting-Ting Liu^c and Jian-Quan Guo^a

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* Corresponding authors

^a Department of Chemistry, Beijing Normal University, Beijing, P. R. China

^b State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing, China

^c Department of Chemistry, Peking University, Beijing, China

Abstract

A dipolar two-dimensional multifunctional (D–π)₃–A dye molecule, 2,4,6-tris(4-octadecyloxystyryl)pyrylium tetrafluoroborate (OP₃) was synthesized. The dye molecule was successfully transferred onto an ITO electrode or quartz by LB techniques. The second-harmonic generation (SHG) and photoelectric conversion (PEC) properties of monolayers of this "umbrella-molecule" were studied under 10 mN m⁻¹ and 30 mN m⁻¹ surface pressure. The different tilt angles of the "umbrella-molecules" result in the difference in SHG and PEC properties. Both SHG and PEC properties of OP₃ obtained under 30 mN m⁻¹ are better than those obtained under 10 mN m⁻¹.

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Article information

DOI: https://doi.org/10.1039/A908531I
Article type: Paper
Submitted: 26 Oct 1999
Accepted: 13 Mar 2000
First published: 18 Apr 2000

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J. Mater. Chem., 2000,10, 1287-1290

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