Interaction between monomers of two surfactants derived from the [Ru(2,2'-bpy)(3)](2+) complex and α, β and γ-cyclodextrins: formation of [2]- and [3]-pseudorotaxanes

M Lopez-Lopez; F Montilla; M Olivares; J A Lebron; M L Moya; P Lopez-Cornejo

doi:10.1039/c3dt32197e

Interaction between monomers of two surfactants derived from the [Ru(2,2'-bpy)(3)](2+) complex and α, β and γ-cyclodextrins: formation of [2]- and [3]-pseudorotaxanes

Dalton Trans. 2013 May 7;42(17):6171-81. doi: 10.1039/c3dt32197e. Epub 2013 Mar 25.

Authors

M Lopez-Lopez¹, F Montilla, M Olivares, J A Lebron, M L Moya, P Lopez-Cornejo

Affiliation

¹ Departamento de Ingeniería Química, Química Física y Química, Orgánica, Universidad de Huelva, Campus El Carmen, Facultad de Ciencias Experimentales, E-21071, Spain.

PMID: 23525374
DOI: 10.1039/c3dt32197e

Abstract

Two new surfactants derived from the tris(2,2'-bipyridine) ruthenium(II) complex, [Ru(2,2'-bpy)(3)](2+), were synthesized and characterized: the double-tailed [Ru(2,2'-bipy)2(4,4'-(C(11)H(23))(2)-2,2'-bipy)](2+) surfactant (RuC11) and the mono-tailed [Ru(2,2'-bipy)(2)(4-(CH(3))-4'-(C(13)H(27))-2,2'-bipy)](2+) surfactant (RuC13). The main characteristic of these species is the presence of an inorganic complex as the polar head of the surfactant with interesting luminescence properties, which were used to study the interaction of these cationic surfactants with α-, β- and γ-cyclodextrins (CD). The results showed the formation of [2]- and [3]-pseudorotaxanes. The binding constant values as well as the stoichiometry of the complexes formed were obtained; the results were confirmed, from a qualitative point of view, with NMR spectra.