Host-aided intermolecular proton transfer in the inclusion complexes of imidazole ⊂ p-sulfonatocalix[4]arene

IF 2.1 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Supramolecular Chemistry Pub Date : 2021-06-03 DOI:10.1080/10610278.2021.1990291

I. Ling, Alexandre N. Sobolev

引用次数: 0

Abstract

ABSTRACT Structural analysis of two multi-component complexes comprising p-sulfonatocalix[4]arene penta-anion as the host molecule and 1-methylimidazolium or 1-butylimidazolium monocation as the guest species, aquated gadolinium(III) ion along with tetraphenylphosphonium cation, is reported. An interesting process during the formation of these inclusion complexes was seen, in which a proton transfer from p-sulfonatocalix[4]arene to the neutral guest molecules took place via acid-base reaction. 1H NMR experiment confirms the formation of the host–guest complexes and the proton transfer between the calixarene and imidazolium species in solution. Careful analysis aided by CrystalExplorer, the dominant intermolecular interactions that contribute to the stabilisation of the host–guest complex formation were readily identified. Bilayer arrangement prevails in the extended structure for both complexes regardless of the type of guest species. Graphical Abstract

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咪唑包合物中宿主辅助的分子间质子转移;对磺托环[4]芳烃

摘要:本文报道了以对磺酰基羧基芳烃五阴离子为宿主分子，以1-甲基咪唑或1-丁基咪唑单位为客体，水化钆(III)离子和四苯基磷离子为络合物的结构分析。在这些包合物的形成过程中，发现了一个有趣的过程，其中质子通过酸碱反应从对磺酰基[4]芳烃转移到中性客体分子。1H NMR实验证实了溶液中杯芳烃与咪唑类化合物之间的质子转移和主客体配合物的形成。在CrystalExplorer的辅助下进行仔细分析，很容易识别出有助于主-客体复合物形成稳定的主要分子间相互作用。无论客体物质的类型如何，两种复合物的扩展结构中普遍存在双层排列。图形抽象

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来源期刊

Supramolecular Chemistry 化学-化学综合

CiteScore

3.60

自引率

3.00%

发文量

审稿时长

2.7 months

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