title: The optical properties, synthesis and characterization of novel 5-aryl-3-benzimidazolyl-1-phenyl-pyrazoline derivatives.
abstract: 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.
authors.affiliation: Taishan Medical University, Taian, Shandong 271016, PR China.
authors.forename: Xiao Qun
authors.initials: XQ
authors.lastname: Cao
authors.forename: Xiao Hui
authors.initials: XH
authors.lastname: Lin
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhu
authors.forename: Yan Qing
authors.initials: YQ
authors.lastname: Ge
authors.forename: Jian Wu
authors.initials: JW
authors.lastname: Wang
mesh_terms: D001562:Benzimidazoles / Q000138:chemical synthesis / Q000737:chemistry*; D047188:Chalcones / Q000138:chemical synthesis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D010659:Phenylhydrazines / Q000138:chemical synthesis / Q000737:chemistry; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D001562:Benzimidazoles; D047188:Chalcones; D010659:Phenylhydrazines; D011720:Pyrazoles