一种用于非线性光学的新型三氰基呋喃染料的光谱研究。

Spectroscopic investigations of a novel tricyanofuran dye for nonlinear optics.

作者信息

Han Likun, Jiang Yadong, Li Wei, Li Yuanxun, Hao Peng

机构信息

State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2008 Nov 1;71(1):86-9. doi: 10.1016/j.saa.2007.11.010. Epub 2007 Nov 22.

DOI:10.1016/j.saa.2007.11.010

PMID:18249030

Abstract

A novel tricyanofuran dye was synthesized and the dye-in-polymer films were fabricated by spin-coating process. The spectroscopic properties of the dye in the solutions and polymer films were investigated by the absorption spectra and fluorescence emission spectra. It is found that the absorption and fluorescence maxima are largely red-shifted along with the increase of the solvent polarity. And the low values of fluorescence quantum yield in higher polarity solvents suggest the presence of twisted intramolecular charge transfer states of the dye. Moreover, the second order polarizability value of the novel dye was estimated based on the quantum-mechanical two-level model.

摘要

合成了一种新型三氰基呋喃染料，并通过旋涂工艺制备了染料掺杂聚合物薄膜。通过吸收光谱和荧光发射光谱研究了该染料在溶液和聚合物薄膜中的光谱性质。研究发现，随着溶剂极性的增加，吸收峰和荧光峰均发生了明显的红移。此外，在高极性溶剂中荧光量子产率较低，这表明染料存在扭曲的分子内电荷转移态。此外，基于量子力学双能级模型估算了该新型染料的二阶极化率值。