Synthesis of Novel and Highlyactive Nonlinear Chromophores in High Yields and Their Linear and Nonlinear Optical Properties

Abstract

Abstract:

Two kinds of novel second-order nonlinear optical(NLO) active chromophores based on diazo with TCF(tricyanofuran) as the acceptors and 3,4-disubstituted thiophene as the bridges were designed and prepared. Improvements in the nitration and diazo coupling reactions increased the total yields of the chromophores from 7% to 20%. The structures of the products were fully characterized via IR, UV, MS and ¹H NMR. A loading study was carried out by doping the chromophore in polycarbonate(PC) with different mass fractions. The polymer films were prepared and the glass transition temperatures(T_g), refractive indices(n), propagation optical loss(OL) and electro-optical coefficient values(γ₃₃) of the films were determined. The γ₃₃ of 16 pm/V was obtained and higher value is expected if poling conditions are further improved. The decomposition temperatures of the chromophores are above 239 ℃, and the optical losses of the films at 1310 nm and 1550 nm is low. These results indicate that the chromophores are very promising candidates for practical applications in the field of electro-optics and photonics.

Key words: Second order nonlinear optics, Electro-optic material, Diazo, Thiophene

CLC Number:

O625.64

TrendMD:

GUO Kun-Peng, ZHANG Tao, ZU Feng-Hua, QIU Ling, ZHEN Zhen, LIU Xin-Hou, SHEN Yu-Quan*. Synthesis of Novel and Highlyactive Nonlinear Chromophores in High Yields and Their Linear and Nonlinear Optical Properties[J]. Chem. J. Chinese Universities, doi: .

References

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