一支新环查尔酮类荧光染料的研究

Preparation and Properties of a Novel Cyclochalcone Fluorescent Dye

本文以1-茚酮和4-甲氧基苯甲醛为原料,通过缩合反应制备了一种新型环查尔酮染料A,茚酮结构为该染料的电子受体,4-甲氧基苯甲醛为给电子部分,拓展了共轭体系,使染料A具有分子内电荷转移能力。通过核磁共振谱图和高分辨质谱确定了染料A的结构,测试了染料A在常见溶剂中的紫外-可见吸收光谱和荧光发射光谱。研究结果表明其具有极性敏感特性,其固体粉末的荧光寿命远长于在溶液中的荧光寿命。经过理论计算,染料A轨道能隙值为3.16 eV。

A new cyclic chalcone dye(A)was prepared from 1-indanone and 4-methoxybenzaldehyde by condensation reaction.In-done structure is the electron acceptor of the dye,and 4-methoxybenzaldehyde is the electron donor,which expands the conjugated system and makes dye A have intramolecular charge transfer ability.The structure of dye A was determined by NMR and high resolution mass spectrometry,and the UV-visible absorption spectrum and fluorescence emission spectrum of dye A in common solvents were test-ed.The results showed that dye A was polar sensitive,and the fluorescence lifetime of its solid powder was much longer than that in solution.The orbital energy gap of dye A is 3.16 eV(in theory).