[Synthesis and spectroscopic characterization of complexes of trivalent lanthanide ions Eu(III) and Tb(III)].
[Synthesis and spectroscopic characterization of complexes of trivalent lanthanide ions Eu(III) and Tb(III)].
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发表时间：
2002-10
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通讯作者：
Jun Yang;Yi-Zhuang Xu;S. Weng;Fangfang Ye;Hongcheng Gao;Jin-guang Wu
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作者：
Jun Yang;Yi-Zhuang Xu;S. Weng;Fangfang Ye;Hongcheng Gao;Jin-guang Wu
合成了Eu（III）和Tb（III）与氧氟沙星形成的两种配位化合物。通过元素化学分析和ICP分析，推导出Ln(oflo)3Cl3.8H2O分子式。红外光谱分析表明，羰基和羧基都可以配位镧系离子（Eu3+/Tb3+）形成稳定的六元环。镧系元素和氧氟沙星之间的反应可以在没有任何额外碱的情况下完成，因为红外光谱表明质子从羧基转移到叔氮。结果表明，含Eu3+的配合物在200 ~ 450 nm范围内被激发。在这两种配合物中，Eu3+被氧氟沙星敏化的效率最高，而Tb3+的敏化效率最低。配体荧光的消失和配合物中Eu3+的强发射，分别归因于5D0-7F0、5D0-7F1、5D0-7F2跃迁，表明配合物发生了良好的能量转移。但是配合物Tb(oflo)3Cl3.8H2O同时从配体和Tb3+照射光。
Two coordination compounds formed between Eu(III) and Tb(III) with ofloxacin have been synthesized. Molecular formula Ln(oflo)3Cl3.8H2O has been deduced from elemental chemical analysis and ICP.FTIR spectroscopy shows that both carbonyl and carboxy groups may coordinate the lanthanide cation(Eu3+/Tb3+) to form a stable six-membered ring. The reaction between lanthanide and ofloxacin can be accomplished without any additional base since FTIR suggests the proton transportation from the carboxyl group to the tertiary nitrogen. The complex containing Eu3+ was proved to be excited with the broad band from 200 to 450 nm. Between the two complexes is studied, Eu3+ is the most efficiently sensitized by ofloxacin, while Tb3+ is the least. The disappearance of the ligand fluorescence and the strong emitting of Eu3+ in the complex, which is ascribed to the transitions 5D0-7F0, 5D0-7F1, 5D0-7F2 respectively, make it clear that some well energy transfer has happened. But complex Tb(oflo)3Cl3.8H2O irradiates lights from both ligand and Tb3+.