Ionic liquids as novel spectroscopic solvents for Eu(III)-containing complex

• 作 者: 邓岳锋 赵贺 陈继 李义民 公发全 韩新民 刘万发
• 机 构: Key Laboratory of Chemical Lasers,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,S
• 出 处: Journal of Rare Earths
• 发表日期: 2011年10期
• 关键词: liquids III Ionic spectroscopic dissolved ionic luminescence luminescent octyl c

Novel soft materials,Eu(III)-containing complex dissolved in [C8mim][X](X=Cl-,PF6-and Tf2N-) ionic liquids,were synthesized.FT-IR and elementary analysis of complex proved that the molecular formula is [C8mim][Eu(TTA)4].The complex and ionic liquids had highthermal stability according to TGA.The photoluminescence spectra showed that the [C8mim][Eu(TTA)4] exhibited typical red emission deriving from 5D0-7F2 transition.After dissolving the complex in [C8mim][X](X=Cl-,PF6-and Tf2N-) ionic liquids,the luminescence intensitydecreased in the following order:[C8mim][Tf2N]≈[C8mim][PF6 ]>[C8mim][Cl].This was because Tf2N-and PF6-anions had larger molecularvolume and weaker coordination ability than Cl-.

Novel soft materials, Eu (III) -containing complex dissolved in [C8mim] [X] (X = Cl-, PF6- and Tf2N-) ionic liquids, were synthesized. FT-IR and elementary analysis of complex proved that the molecular formula [C8mim] [Eu (TTA) 4]. The complex and ionic liquids had highthermal stability according to TGA. photoluminescence spectra showed that the [C8mim] [Eu (TTA) 4] exhibited typical red emission deriving from 5D0-7F2 transition The following luminescence intensity was established in the following order: [C8mim] [Tf2N] ≈ [C8mim] [PF6]> [C8mim] [X] (X = Cl-, PF6- and Tf2N-) C8mim] [Cl]. This was because Tf2N-and PF6-anions had larger molecular volume and weaker coordination ability than Cl-.