Host-guest complexes with p-sulfonatocalix[4,5]arenes charged crown ethers and lanthanides: Factors affecting molecular capsule formation

Scott J. Dalgarno, Jerry L. Atwood, Colin L. Raston

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Incorporation of the smallest diprotonated diaza-functionalized crown ethers into host-guest assemblies with p-sulfonatocalix[4 or 5]arenes gives insight into the dominant factors in the formation of "molecular capsule" or "alternative host-guest bilayer" structures in the solid state, in the presence of aquated lanthanide(III) cations. For p-sulfonatocalix[4]arene, molecular capsule formation is dependent on guest size, protonation of the diaza-crown ether, and the pH of the reaction medium. In contrast, formation of (di)aza-crown ether-based molecular capsules with p-sulfonatocalix[5]arene was elusive under the conditions studied. Rather, an "alternative host-guest bilayer" structure formed in the presence of europium(III) ions.

Original languageEnglish
Pages (from-to)174-180
Number of pages7
JournalCrystal Growth and Design
Volume6
Issue number1
DOIs
Publication statusPublished - 1 Jan 2006
Externally publishedYes

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