5-呋喃基-1-苯并噻唑基吡唑啉类荧光化合物的合成及光谱分析

Synthesis and Spectrum of Some 5-Furanyl-1-Benzothiazoyl Pyrazoline Compounds with Fluorescence

吡唑啉衍生物具有高的蓝色荧光,并且具有高量子效率,很易于用作发光材料中电子传输层。依据Schellhammer经验中化学结构与荧光性关系,在吡唑啉的1-位引入了苯并噻唑基,3-位引入苯基衍生物,使其具有荧光性,5-位引入呋喃基作为助色团,可使荧光波长红移,增加荧光性。文章设计并合成了六种5-位引入呋喃基苯并噻唑吡唑啉类荧光化合物,通过红外光谱、荧光光谱、1HNMR、元素分析对合成的化合物进行了表征,表明这类化合物具有良好的荧光性,其最大发射波长在440～460nm之间,经过分析得知其荧光强度的大小与衍生物中不同的取代基有关。

Pyrazoline derivatives have been investigated in many aspects due to their blue light emission with high quantum yield,ready accessibility,and easily being used as carrier transporting as well as emitting materials.According to Schellhammer theory of the relation between chemical structure and fluorescent quality,we designed some new fluorescent compounds with the benzothiazoyl group in the 1-pyrazoline,the derivatives of phenyl in the 3-pyrazoline and the furan in the 5-pyrazoline,and they possess fluorescent nature.In addition,the results of our research have shown that the benzothiazoyl derivatives can also be used for electroluminescence devices.Several benzothiazoyl pyrazoline compounds were synthesized,and their structures were confirmed by IR,^1H NMR,fluorescence spectrum and elementary analysis.The fluorescence spectra showed that these compounds have good fluorescence.The fluorescence emission wavelengths are about 440-460 nm,and the fluorescence intensity is related to the substituent of the compounds.