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首页> 外文期刊>New Journal of Chemistry >A facile synthetic route to convert Tb(III) complexes of novel tetra-1,3-diketone calix[4]resorcinarene into hydrophilic luminescent colloids
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A facile synthetic route to convert Tb(III) complexes of novel tetra-1,3-diketone calix[4]resorcinarene into hydrophilic luminescent colloids

机译：一种将新型四-1,3-二酮杯[4]间苯二甲烯的Tb（III）配合物转化为亲水性发光胶体的简便合成途径

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摘要

The work presents the synthesis of a novel calix[41resorcinarene cavitand bearing four 1,3-diketone groups at the upper rim and its complex formation with Tb(III) ions in DMF and DMSO solutions. Electrospray ionization mass spectra, ~1H NMR, UV-Vis and luminescence spectra indicate a long (three hours at least) equilibration time for the complex formation between the cavitand and Tb(III) in alkaline DMF and DMSO solutions. These results are explained by the restricted keto-enol conversion, resulting from the steric hindrance effect of the methylenedfoxy-groups linking the benzene rings within the cavitand framework. A facile synthetic route, to convert luminescent Tb(III) complexes of various stoichiometries into luminescent hydrophilic colloids is disclosed in this work. The route is based on the reprecipitation of the Tb(III) complexes from DMF to aqueous solutions with further polyelectrolyte deposition without prior separation of the luminescent complexes. The luminescent colloids exhibit high stability over time and in buffer systems, which is a prerequisite for their applicability in analysis and biolabeling.
机译：这项工作提出了一种新的杯[41间苯二甲芳基cavitand，其在上边缘具有四个1，3-二酮基团的合成及其在DMF和DMSO溶液中与Tb（III）离子的复合形成。电喷雾电离质谱，〜1H NMR，UV-Vis和发光光谱表明，碱性DMF和DMSO溶液中空泡体和Tb（III）之间形成复合物需要很长的平衡时间（至少三小时）。这些结果是由酮-烯醇转化率受限所解释的，这是由于空化骨架中连接苯环的甲基化的甲氧基的空间位阻效应所致。在这项工作中公开了一种将各种化学计量的发光Tb（III）配合物转化为发光亲水胶体的简便合成途径。该路线是基于Tb（III）配合物从DMF到水溶液的再沉淀以及进一步的聚电解质沉积，而无需事先分离发光配合物。发光胶体随时间和在缓冲液系统中显示出高稳定性，这是其在分析和生物标记中的适用性的前提。

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