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以芳基乙炔与硫脲为起始原料,通过一锅法,经过在无溶剂条件下的氧化偶联反应和在水相中的成环反应,两步串联绿色合成了2,5-二苯基噻吩及其衍生物.所合成化合物经~1H NMR,~(13)C NMR,HRMS表征,均为目标产物.在此基础上,进一步探索了所合成化合物的UV和荧光性质,实验结果表明,所合成化合物的紫外最大吸收波长在292~341 nm之间,荧光光谱表明该类化合物具有良好的荧光性,在甲醇中最大发射波长在386~454.5 nm之间,在二氯甲烷中测定的最大发射波长在390~412 nm之间.实验结果显示,随共轭体系增大,荧光发射波长发生红移.
Arylacetylene and thiourea as starting materials, through a one-pot method, through the oxidative coupling reaction under solvent-free conditions and the ring-forming reaction in the aqueous phase, two-step series of green synthesis of 2,5-dibenzene Thiophene and its derivatives.The synthesized compounds were characterized by ~ 1H NMR, ~ (13) C NMR and HRMS, respectively, which were the target products.Furthermore, the UV and fluorescence properties of the synthesized compounds were also explored.The experimental results showed that , The maximum UV absorption wavelength of the synthesized compounds ranged from 292 to 341 nm. Fluorescence spectra showed that these compounds have good fluorescence. The maximum emission wavelength in methanol ranged from 386 nm to 454.5 nm. The maximum emission wavelength is between 390 and 412 nm.The experimental results show that with the increase of the conjugate system, the fluorescence emission wavelength shifts red.