【摘要】 设计并合成了"D-π-A"绿色发光化合物,2,2-二氰基甲叉-3-氰基-4-(N,N-二乙氨基苯乙烯基)-5,5-二甲基-2,5-二氢呋喃,用IR,1H NMR和元素分析表征了它的结构并测试了其在不同环境中的光谱性质。化合物在氯仿中(1×10-4mol/L)的最大波长吸收峰(λmax)位于535 nm处。在530 nm激发波长的激发下,该化合物显示出很强的荧光发射峰,位于681 nm(氯仿中)处。随着化合物(氯仿中)浓度的增加,荧光强度增强,但浓度增加至1×10-3mol/L时,出现猝灭现象。溶剂极性也对发射波长和荧光强度产生影响,随着溶剂极性增大,最大发射波长红移且荧光强度增强,从558 nm(苯中)红移到623 nm(丙酮中)。更多还原

【Abstract】 The green light emitting compound,the "D-π-A" chromophore,or 2,2-dicycnomethylene-3-cyano-4-(N,N-diethyamino-styryl)-5,5-dimethyl-2,5-dihydrofuran is designed and synthesized.IR,1H NMR and elemental analysis are used to analyze its structure and test its spectral properties in different environments.The maximum absorption peak(λmax) of the compound in chloroform(1×10-4 mol/L) is at 535 nm.Under the excitation wavelength of 530 nm,it shows strong fluorescence emission in chloroform and the peak stands at 681 nm.The fluorescence intensity is enhanced with the increase in concentration from 1×10-7 mol/L to 1×10-4 mol/L but quenched when intensity reaches 1×10-3 mol/L in chloroform.When the polarity of solvent increases,the maximum fluorescence wavelength is red shifted from 558 nm(in benzene) to 623 nm(in acetone) and the fluorescence intensity is enhanced.更多还原