title: Synthesis, X-ray crystal structure and optical properties of novel 1,3,5-triarylpyrazoline derivatives and the fluorescent sensor for Cu2+.
abstract: A series of novel 1,3,5-triarylpyrazoline derivatives was synthesized by the reaction of chalcone and 5-aryl-2-hydrazinyl-1,3,4-thiadiazole in 43.3-84.7% yields. The structures of compounds were characterized using IR, (1)H NMR and HRMS spectroscopy and X-ray diffraction analysis. The absorption and fluorescence characteristics of the compounds were investigated in dichloromethane, toluene, acetonitrile, N,N-dimethylformamide and tetrahydrofuran. The results showed that the absorption maxima of the compounds vary from 366 to 370nm depending on the group bound to benzene rings. The maximum emission spectra of the compounds in dichloromethane were dependent on nature of groups in benzene ring. Furthermore, the compound 3b can be used to determine Cu(2+) ion with high selectivity and a low detection limit in the DMF:H2O=1:1 (v/v) solution.
authors: Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
authors: Sheng-Qing
authors: SQ
authors: Wang
authors: Ying
authors: Y
authors: Gao
authors: Hao-Yan
authors: HY
authors: Wang
authors: Xiao-Xin
authors: XX
authors: Zheng
authors: Shi-Li
authors: SL
authors: Shen
authors: Yan-Ru
authors: YR
authors: Zhang
authors: Bao-Xiang
authors: BX
authors: Zhao
mesh_terms: D002413:Cations, Divalent / Q000032:analysis; D003300:Copper / Q000032:analysis*; D018360:Crystallography, X-Ray; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D057230:Limit of Detection; D008958:Models, Molecular; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D002413:Cations, Divalent; D005456:Fluorescent Dyes; D011720:Pyrazoles; D003300:Copper