Synthesis, crystal structure, and fluorescence of two dimeric europium（III） complexes with 2-（trifluoromethyl）benzoate
来源期刊：Journal of Rare Earths2008年第6期
论文作者：李艳秋 李培洲 李夏
文章页码：804 - 808
摘 要：<正>Two complexes [Eu2（2-TFMBA）6（2,2’-bipy）2]·2H2O （1） and Eu2（2-TFMBA）6（1,10-phen）2 （2） （2-TFMBA=2-（Trifluoromethyl） benzoate; 2,2’-bipy=2,2’-bipyridine; 1,10-phen=1,10-phenanthroline） were synthesized by solvent method and determined by X-ray diffrac-tion analysis. Complex 1 crystallizes in monoclinic system with space group P21/c, whereas complex 2 crystallizes in triclinic system with space group Pī. Both are binuclear molecules with an inversion center. In complex 1, two center Eu3+ ions are linked together by four 2-TFMBA ligands in bidentate-bridging mode. Each Eu3+ ion is eight-coordinated with six O atoms from five 2-TFMBA ligands and two N atoms from one 2,2’-bipy molecule. In complex 2, two center Eu3+ ions are linked together by four 2-TFMBA ligands in two modes, namely, bidentate-bridging and tridentate-bridging. Each Eu3+ ion is nine-coordinated with seven O atoms from five 2-TFMBA ligands and two N atoms from one 1,10-phen molecule. The two complexes both exhibited strong red fluorescence under ultraviolet light, and the 5D0→7Fj （j=0–4） transition emissions of Eu3+ ion were observed in their emission spectra.
李艳秋，李培洲，李夏
摘 要：<正>Two complexes [Eu2（2-TFMBA）6（2,2’-bipy）2]·2H2O （1） and Eu2（2-TFMBA）6（1,10-phen）2 （2） （2-TFMBA=2-（Trifluoromethyl） benzoate; 2,2’-bipy=2,2’-bipyridine; 1,10-phen=1,10-phenanthroline） were synthesized by solvent method and determined by X-ray diffrac-tion analysis. Complex 1 crystallizes in monoclinic system with space group P21/c, whereas complex 2 crystallizes in triclinic system with space group Pī. Both are binuclear molecules with an inversion center. In complex 1, two center Eu3+ ions are linked together by four 2-TFMBA ligands in bidentate-bridging mode. Each Eu3+ ion is eight-coordinated with six O atoms from five 2-TFMBA ligands and two N atoms from one 2,2’-bipy molecule. In complex 2, two center Eu3+ ions are linked together by four 2-TFMBA ligands in two modes, namely, bidentate-bridging and tridentate-bridging. Each Eu3+ ion is nine-coordinated with seven O atoms from five 2-TFMBA ligands and two N atoms from one 1,10-phen molecule. The two complexes both exhibited strong red fluorescence under ultraviolet light, and the 5D0→7Fj （j=0–4） transition emissions of Eu3+ ion were observed in their emission spectra.
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