Abstract

A new series of chalcones bearing two or more 3,4-ethylenedioxythiophene fragments were synthesized, and their optical properties were studied. The Stokes shifts (Δλ) and band gaps (E_g^opt) were calculated on the basis of the absorption and emission spectra. The largest Stokes shift (115 nm) was found for a symmetrical product of the terephthalaldehyde and 3,4-ethylenedioxythiophene-2-carbaldehyde condensation, and the smallest band gap (1.93 eV) is characteristic of a chalcone that contains a 2,2',5',2''-ter(3,4-ethylenedioxythiophene). Correlations were established between the band gap and mutual arrangement of the 3,4-ethylenedioxythiophene fragments in the prepared chalcones.

中文翻译：

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含3,4-乙撑二氧噻吩片段的新型查耳酮的合成与光学性质

摘要

合成了一系列带有两个或多个3,4-乙撑二氧噻吩片段的查耳酮，并研究了它们的光学性质。基于吸收光谱和发射光谱计算出斯托克斯位移（Δλ）和带隙（E _g ^opt）。发现对苯甲醛和3,4-乙烯二氧噻吩-2-甲醛缩合的对称产物具有最大的斯托克斯位移（115 nm），最小的带隙（1.93 eV）是包含2,2'的查耳酮的特征。 ，5'，2''-ter（3,4-乙撑二氧噻吩）。在制备的查耳酮中3,4-乙撑二氧噻吩片段的带隙与相互排列之间建立了相关性。