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首页> 外文期刊>Inorganic Chemistry Communications >Structural analysis and electronic properties of a homodinuclear erbium(III) complex bridged by the polyazine ligand 2,2'-bipyrimidine
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Structural analysis and electronic properties of a homodinuclear erbium(III) complex bridged by the polyazine ligand 2,2'-bipyrimidine

机译：聚嗪配体2,2'-联嘧啶桥接的同核u（III）配合物的结构分析和电子性质

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摘要

Structural analysis of the previously reported homodinuclear complex [Er(tfa)3]2bpm (where tfa = 4,4,4-trifluoro-1-(2-furyI)-1,3-butanedione and bpm = 2,2'-bipyrimidine) synthesized by reaction of two equivalents of ErCl3 with six equivalents of tfa and one equivalent of bpm in a basic ethanol solution is presented. X-ray quality crystals were grown by slow evaporation of concentrated methanol solution containing the complex. The complex crystallizes in the monoclinic space group P21, with a planar bpm ligand. The erbium.. .erbium distance is 6.715(5) A. Each erbium center is eight coordinate from six tfa oxygens and two bpm nitrogens. Electronic transitions of concentrated solutions of the complex reveal three sharp lines corresponding to the 4f-4f* transitions at 486 nm, 520 nm and 657 nm with the lowest energy transition corresponding to ~4I_(15/2) -> ~4F_(9/2).
机译：先前报道的同核双核复合物[Er（tfa）3] 2bpm的结构分析（其中tfa = 4,4,4-三氟-1-（2-furyI）-1,3-丁二酮，bpm = 2,2'-联嘧啶）是通过在碱性乙醇溶液中使两当量的ErCl3与六当量的tfa和一当量的bpm反应合成的。通过缓慢蒸发含有配合物的浓甲醇溶液，可以生长出质量良好的X射线晶体。配合物在单斜空间群P21 / n中结晶，并带有平面bpm配体。 er距离为6.715（5）A。每个center中心是六个tfa氧和两个bpm氮的八个坐标。配合物浓缩溶液的电子跃迁显示出三条分别对应于486 nm，520 nm和657 nm处4f-4f *跃迁的尖线，最低能量跃迁对应于〜4I_（15/2）->〜4F_（9 / 2）。

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