Hybrid cavitand capsule with hydrogen bonds and metal-ligand coordination bonds: guest encapsulation with anion assistance.
Hybrid cavitand capsule with hydrogen bonds and metal-ligand coordination bonds: guest encapsulation with anion assistance.
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DOI：
10.1021/ja903253c
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发表时间：
2009-07
影响因子：
15
通讯作者：
Masamichi Yamanaka;Naoaki Toyoda;Kenji Kobayashi
中科院分区：
文献类型：
--
作者：
Masamichi Yamanaka;Naoaki Toyoda;Kenji Kobayashi
多功能化 C(2v)-空穴配体 1 通过六步由四溴空穴配体合成。 1和2在CDCl(3)或CD(2)Cl(2)中的1:1混合物通过氢键和金属配体配位键定量自组装成超分子杂化胶囊3。胶囊3的空腔充满三氟甲磺酸根离子和渗透的酰脲烷基。胶囊3在阴离子的帮助下封装了中性客体分子，例如4,4'-二碘联苯(4)。通过NMR技术鉴定了封装复合物。客体交换的动力学可通过阴离子的量和/或类型或其他影响（例如溶剂的极性）来控制。
Multifunctionalized C(2v)-cavitand 1 was synthesized in six steps from a tetrabromo cavitand. A 1:1 mixture of 1 and 2 in CDCl(3) or CD(2)Cl(2) quantitatively self-assemble into a supramolecular hybrid capsule 3 through hydrogen bond and metal-ligand coordination bond. The cavity of the capsule 3 is filled with triflate ion and penetrated alkyl groups of ureides. Capsule 3 encapsulates a neutral guest molecule such as 4,4'-diiodobiphenyl (4) with the assistance of an anion. The encapsulation complex was identified by an NMR technique. The kinetics of guest exchange is controllable by the amounts and/or types of anions or other influences such as the polarity of the solvent.