Solution and solid state interplay of isomeric 4′-(pyridyl)-3, 2′:6′,3″-terpyridines with p-sulfonatocalix[4]arene

Christopher B. Smith, Mohamed Makha, Colin L. Raston, Alexandre N. Sobolev

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

p-Sulfonatocalix[4]arene, 1, forms inclusion complexes with the three isomeric 4′-(pyridyl)-3,2′:6′,3″-terpyridines in acidic aqueous medium. Both 4′-(2-pyridyl)-, 3, and 4′-(3′-pyridyl)- 3,2′:6′,3″-terpyridine, 4, form 1: 1 host-guest complexes in the solid state, in which the terminal 4′-(pyridyl) ring resides in the cavity of the calixarene. In the case of 4′-(4-pyridyl)-3,2′: 6′,3″-terpyridine, 5, a molecular capsule is formed in which two calixarenes encapsulate one terpyridine guest molecule, with the terminal pyridine ring being exo to the calixarene cavities. NMR spectroscopy indicates that association between p-sulfonatocalix[4]arene and each terpyridine guest occurs in solution at elevated temperature (333 K) as a prelude to crystallisation of the inclusion complexes.

Original languageEnglish
Pages (from-to)535-542
Number of pages8
JournalNew Journal of Chemistry
Volume31
Issue number4
DOIs
Publication statusPublished - 16 Apr 2007
Externally publishedYes

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