Synthesis and properties of the complexes of lanthanides with nitronyl nitroxide biradical  

作　　者：赵琦华 李立存 廖代正 姜宗慧 阎世平 方瑞斌 

机构地区：[1]Department of Chemistry, Nankai University, Tianjin 300071, China [2]State Key Laboratory of Coordination Chemistry, Nanjing Unive rsity, Nanjing, Jiangsu 210093, China [3]Department of Chemistry, Yunnan University, Kunming, Yunnan 650091, China

出　　处：《Chinese Journal of Chemistry》2000年第4期561-564,共4页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Nos. 29871019 and 29631040) and the Natural Science Foundation of Yunnan Province (No. 1999B0003M).

摘　　要：Five novel complexes of formula [Ln(hfac)3] · BNPhOM, where La = Gd, Ho, Dy, Y, Er; Mac = hexfluoracetylacetonate; BNPhOM=1,3-[bis-2,2′,-(4,4,5,5-tetramethyl-4,5-di-hydro-1H-imidazolyl-1-oxyl-3-oxide) phenoxy] propane, have been prepared and characterized by elemental analysis, molar conductances, IR and electronic spectra. The temperature dependence of the magnetic susceptibility for Gd(III) and radical was measured (2—-300 K). The observed data were successfully simulated giving the exchange integral J = 0.28 cm?1, J' = - 0.33 cm?1. These results indicate a weak ferromagnetic spin exchange interaction between Gd(III) ion and the radical and a weak antiferromagnetic spin exchange interaction between the radical and radical.Five novel complexes of formula [Ln(hfac)3] · BNPhOM, where La = Gd, Ho, Dy, Y, Er; Mac = hexfluoracetylacetonate; BNPhOM=1,3-[bis-2,2′,-(4,4,5,5-tetramethyl-4,5-di-hydro-1H-imidazolyl-1-oxyl-3-oxide) phenoxy] propane, have been prepared and characterized by elemental analysis, molar conductances, IR and electronic spectra. The temperature dependence of the magnetic susceptibility for Gd(III) and radical was measured (2—-300 K). The observed data were successfully simulated giving the exchange integral J = 0.28 cm?1, J' = - 0.33 cm?1. These results indicate a weak ferromagnetic spin exchange interaction between Gd(III) ion and the radical and a weak antiferromagnetic spin exchange interaction between the radical and radical.

关 键 词：Rare earth complexes nitronyl nitroxide biradical MAGNETISM 

分 类 号：O621[理学—有机化学]