Synthesis,crystal structure and fluorescence property of 1-D europium complex with 2,3-difluorobenzoate
来源期刊：Journal of Rare Earths2009年第6期
论文作者：宋金浩 吴小说 李夏
文章页码：1092 - 1095
摘 要：A new chain europium complex [Eu（2,3-DFBA）3·（H2O）2]n（2,3-DFBA=2,3-difluorobenzoate） was synthesized by solvent method.X-ray single-crystal diffraction analysis revealed that Eu3+ ions were linked through 2,3-DFBA groups via alternate bidentate-bridging and tridentate chelating-bridging coordination modes to form a one-dimensional（1-D） polymeric chain.Each Eu3+ ion is eight-coordinated by six O atoms of five 2,3-DFBA ligands and two water molecules.The abundant hydrogen bonds between chains resulted in a two-dimensional（2-D） network structure.The titled complex crystallizes in monoclinic system,space group P21/c,with a=0.79977（2） nm,b=2.99156（7） nm,c=0.93260（2） nm,and β=100.691（1）°.The complex exhibited strong red fluorescence under ultraviolet light,and the 5D0→7Fj（j=0～4） transitions of Eu3+ ion were observed in its emission spectrum.
宋金浩，吴小说，李夏
Department of Chemistry,Capital Normal University
摘 要：A new chain europium complex [Eu（2,3-DFBA）3·（H2O）2]n（2,3-DFBA=2,3-difluorobenzoate） was synthesized by solvent method.X-ray single-crystal diffraction analysis revealed that Eu3+ ions were linked through 2,3-DFBA groups via alternate bidentate-bridging and tridentate chelating-bridging coordination modes to form a one-dimensional（1-D） polymeric chain.Each Eu3+ ion is eight-coordinated by six O atoms of five 2,3-DFBA ligands and two water molecules.The abundant hydrogen bonds between chains resulted in a two-dimensional（2-D） network structure.The titled complex crystallizes in monoclinic system,space group P21/c,with a=0.79977（2） nm,b=2.99156（7） nm,c=0.93260（2） nm,and β=100.691（1）°.The complex exhibited strong red fluorescence under ultraviolet light,and the 5D0→7Fj（j=0～4） transitions of Eu3+ ion were observed in its emission spectrum.
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