碱金属离子与由三足杂环六齿配体和Ga(III)形成的假隐窝的变构结合†

Akira Katoh, Hidenori Kudo, Ryota Saito
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引用次数: 4

摘要

合成了一种新的三元杂环六齿配体,其中三组3-羟基-4(1H)-吡啶酮和乙氧基链与三(羧乙氧基甲基)乙烷连接。水溶液中的UV-Vis光谱分析表明,六齿配体与铁(III)的化学计量比为1:1(λmax 460 nm和ε5100 M−1 cm−1;相对稳定性常数log K=32.9)。通过1H NMR在CDCl3–CD3CN(1:1)混合物中检测了碱金属离子与由三齿六齿配体和Ga(III)形成的赝密码子的变构结合光谱学。假密码子与Na+和K+离子形成1:1的配合物,结合常数估计几乎相同(Na+为5.9×102,K+为5.8×102 M−1)。
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Allosteric Binding of Alkali Metal Ions to a Pseudocryptand Formed by a Tripodal Heterocyclic Hexadentate Ligand and Ga(III)†
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