Na~+ and Ca~(2+) ion selective pyridylcarboxylate rings of Pd(II) and Pt(II)

Peili Teo; L.L.Koh; T.S.Andy Hor

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Na~+ and Ca~(2+) ion selective pyridylcarboxylate rings of Pd(II) and Pt(II)

机译：Pd（II）和Pt（II）的Na〜+和Ca〜（2+）离子选择性吡啶基羧酸盐环

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A series of dinuclear Pd(II) and Pt(II) with central rectangular cavities have been self-assembled using pyridyl carboxylates as spacers and phosphines [1,1'-bis(diphenylphosphino)ferrocene (dppf) and triphenylphosphines] as supporting ligands. Some of these function as metallacrowns by capturing adventitious alkali or alkali earth metals ions. Two of the Pt(II) rings bind selectively to Na' whereas the Pd(II) rings prefer Ca~(2+). Such endocyclic association with the metal ion is facilitated by the converging carbonyl pendants and supported by coordinated triflates. Affinity and selectivity are achieved through stereo-conformational control of the pendant carbonyls and the ring which are isomerically dependent on the spacer. These intermetallic complexes are characterized by X-ray single-crystal crystallography and solution spectroscopy (NMR and ESI-MS). A varied range of local geometries of Na~+ and Ca~(2+) are revealed.

机译：使用吡啶基羧酸盐作为间隔基和膦[1,1'-双（二苯基膦基）二茂铁（dppf）和三苯基膦]作为支持配体，自组装了一系列具有中心矩形腔的双核Pd（II）和Pt（II）。这些中的一些通过捕获不定的碱金属或碱土金属离子而用作金属漆。两个Pt（II）环选择性地与Na'结合，而Pd（II）环更喜欢Ca〜（2+）。会聚的羰基侧基促进了与金属离子的这种环内缔合，并由配位的三氟甲磺酸酯支撑。亲和力和选择性是通过立体构象控制悬垂的羰基和与异构体相关的间隔基环而实现的。这些金属间配合物的特征在于X射线单晶晶体学和溶液光谱法（NMR和ESI-MS）。揭示了Na〜+和Ca〜（2+）的各种局部几何形状。

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《Dalton transactions: An international journal of inorganic chemistry》 |2009年第29期|共10页
作者
Peili Teo; L.L.Koh; T.S.Andy Hor;
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正文语种 eng
中图分类 540C0007-A;
关键词
ion; pyridylcarboxylate; Pd(II);

机译：离子;羧酸吡啶酯;钯（II）;

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Na~+ and Ca~(2+) ion selective pyridylcarboxylate rings of Pd(II) and Pt(II)

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