标题：The synthesis, X-ray crystal structure and optical properties of novel 5-aryl-3-ferrocenyl-1-pyridazinyl-pyrazoline derivatives
作者：Gong, Z.-L.;Xie, Y.-S.;Zhao, B.-X.;Lv, H.-S.;Liu, W.-Y.;Zheng, L.-W.;Lian, S.
作者机构：[Gong, Z.-L] Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;[ Xie, Y.-S] Depar 更多
通讯作者地址：[Zhao, BX]Shandong Univ, Inst Organ Chem, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.
来源：Journal of Fluorescence
关键词：Ferrocenyl pyrazoline;Fluorescence;Synthesis;UV absorption;X-ray
摘要：A series of novel 5-aryl-3-ferrocenyl-1-pyridazinyl pyrazoline derivatives was synthesized by the reaction of ferrocenyl chalcone and 3-chloro-6- hydrazinylpyridazine in 10-65% yields. The compounds were characterized using IR, 1H NMR, HRMS spectroscopic techniques and representative compounds 3c and 4c were assigned based on the X-ray crystallographic structure. The absorption and fluorescence characteristics of the compounds were investigated in chloroform, tetrahydrofuran and acetonitrile, respectively. The results showed that the absorption maxima of the compounds varied from 323 to 327 nm depending on the groups bonded to benzene and pyridazine ring. The maximum emission spectra of compounds in CHCl3 were dependent on groups in pyridazine ring in which a strong donating-electron group such as propoxyl group on pyridazine ring in N-1 position of pyrazoline made the emission wavelength of 4a-4e small red shifte than that of compounds 3a-3e with chlorine group. The intensity of absorption and fluorescence was also correlated with substituent on aryl ring in C-5 position of pyrazoline. In addition, the absorption spectra of these compounds changed very little, but the fluorescence spectra had much change with increasing solvent polarity.