Observation of strong halogen bonds in the solid state structures of bis-haloimidazolium macrocycles
作者:Nicholas G. White、Antonio Caballero、Paul D. Beer
DOI:10.1039/c3ce41944d
日期:——
macrocycles are described, containing either chloro or iodoimidazolium heterocycles. Crystal structure determinations of these macrocycles as their bromide salts are reported, as well as of the nitrate salt of the analogous bis-bromoimidazolium macrocycle. In all structures, short halogen bonds are observed in the solidstate, with the nitrate complex of the bis-bromoimidazolium macrocycle containing a particularly
Fluorescent Charge-Assisted Halogen-Bonding Macrocyclic Halo-Imidazolium Receptors for Anion Recognition and Sensing in Aqueous Media
作者:Fabiola Zapata、Antonio Caballero、Nicholas G. White、Tim D. W. Claridge、Paulo J. Costa、Vı́tor Félix、Paul D. Beer
DOI:10.1021/ja302213r
日期:2012.7.18
The synthesis and anion binding properties of a new family of fluorescent halogen bonding (XB) macrocyclic halo-imidazolium receptors are described. The receptors contain chloro-, bromo-, and iodo-imidazolium motifs incorporated into a cyclic structure using naphthalene spacer groups. The large size of the iodine atom substituents resulted in the isolation of anti and syn conformers of the iodo-imidazoliophane
Iodo-imidazolium salts: halogen bonding in crystals and anion-templated pseudorotaxanes
作者:Antonio Caballero、Sam Bennett、Christopher J. Serpell、Paul D. Beer
DOI:10.1039/c2ce26020d
日期:——
2-iodoimidazolium group is exploited in the anion-templated assembly of pseudorotaxanes with isophthalamide containing macrocycles. Crystallographic and solution-phase studies illustrate that the iodo-imidazolium motif is a potent halogenbond donor, forming the most stable interpenetrated assemblies in solution with the chloride aniontemplate.