Taishan Medical University, Taian, Shandong 271016, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Dec;98:76-80. doi: 10.1016/j.saa.2012.08.036. Epub 2012 Aug 26.
A series of novel 5-aryl-3-benzimidazolyl-1-phenyl-pyrazoline derivatives were synthesized by the reaction of benzimidazolyl chalcone and phenylhydrazine in 41-72% yields. The compounds were characterized using IR, (1)H NMR and HRMS. Absorption and fluorescence spectra were measured in different organic solvent. An intense absorption maxima was noted at ca. 370 nm and emission maxima was noted at ca. 460 nm. The absorption spectra of the pyrazoline derivatives reveal that 5-aryl group attached to the pyrazoline ring hardly influenced the maximum absorption. The fluorescence spectra of these compounds indicated the emission wavelength was red shifted and the fluorescence intensity was decreased with the increase in solvent polarity.
一系列新型 5-芳基-3-苯并咪唑基-1-苯基-吡唑啉衍生物通过苯并咪唑基查尔酮和苯肼在 41-72%产率下的反应合成。使用 IR、(1)H NMR 和 HRMS 对化合物进行了表征。在不同有机溶剂中测量了吸收和荧光光谱。在约 370nm 处观察到强吸收最大值，在约 460nm 处观察到发射最大值。吡唑啉衍生物的吸收光谱表明，连接到吡唑啉环上的 5-芳基基团几乎不影响最大吸收。这些化合物的荧光光谱表明，发射波长红移，荧光强度随溶剂极性的增加而降低。
