Detection of hydrophobic microdomains in anionic polyelectrolytes with tris-(4,7-diphenyl-1,10-phenanthroline)(3)cr(iii)
| Autor: | Marcela D. Urzúa, Paulina Cañete, Victor Vargas, Silvia Ronco, Mauricio Isaacs, Hernán E. Ríos |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Anions
Luminescence Stereochemistry Cyclohexanol Biomaterials chemistry.chemical_compound Electrolytes Colloid and Surface Chemistry Polymer chemistry Side chain Organometallic Compounds Molecule Phenol Aqueous solution Quenching (fluorescence) Molecular Structure Viscosity Water Hydrogen-Ion Concentration Polyelectrolyte Surfaces Coatings and Films Electronic Optical and Magnetic Materials Molecular Weight Solutions chemistry Hydrophobic and Hydrophilic Interactions |
| Zdroj: | JOURNAL OF COLLOID AND INTERFACE SCIENCE Artículos CONICYT CONICYT Chile instacron:CONICYT |
| Popis: | This paper describes the changes in the luminescent properties of the tris-(4,7-diphenyl-1,10-phenanthroline)(3)Cr(III), [Cr(dip)(3)](3+) complex in an aqueous solution of three polyelectrolytes containing cyclohexyl, phenyl or 1-naphthyl groups in the side chain. When the polyelectrolytes form hydrophobic microdomains the luminescence of [Cr(dip)(3)](3+) is affected. The luminescence increases in the presence of cyclohexyl groups in the side chains, but decreases in the presence of phenyl and naphthyl groups (in that order). This fact can be explained in terms of a reductive quenching mechanism between the complex and the aromatic groups. Indeed, experiments performed with the complex and the alcohols corresponding to the functional groups, i.e., cyclohexanol, phenol, and naphthol, also show the same behavior, confirming the interaction with the functional groups and not other components of the polyelectrolyte. The luminescent properties of the [Cr(dip)(3)](3+) complex allow the detection of hydrophobic microdomains arising from the host-guest interaction. Moreover, the complex is able to distinguish between a nonaromatic hydrophobic microdomain and an aromatic one. |
| Databáze: | OpenAIRE |
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