Pyridyl- and benzimidazole-based ruthenium(iii) complex for selective chloride recognition through fluorescence spectroscopy
Por:
Sharma H., Guadalupe H.J., Narayanan J., Hofeld H., Pandiyan T., Singh N.
Publicada:
1 ene 2013
Resumen:
Three ruthenium(ii) and (iii) metal complexes of the compositions ([Ru(1)(Cl)(PPh3)]+ (4), ([Ru(2)(Cl)(PPh 3)]+ (5) and ([Ru(3)(Cl)(H2O)]2+ (6) have been synthesized from oligodentate pyridyl-(1) and benzimidazole ligands (2-3) and structurally characterized. Our investigations revealed that if the coordination sphere of the metal ion carries a strong coordinating PPh 3 ligand (complexes 4 and 5), the framework was not suitable for anion binding at all. However, when coordination of solvent (H2O) to the metal centre occurred instead (complex 6), a receptor for anion recognition through fluorescence spectroscopy could be generated. This allowed us to develop a sensor for the selective recognition of chloride over several other anions. In order to screen potential applications, the sensor was tested for the determination of chloride concentration in a series of four commercially available oral rehydration salts, giving excellent agreement with the values reported by the corresponding manufacturer. The detection limit was established to be 5 µM. © 2013 The Royal Society of Chemistry.
Filiaciones:
Sharma H.:
Department of Chemistry, Indian Institute of Technology Ropar (IIT Ropar), Rupnagar Punajb 140001, India
Guadalupe H.J.:
Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico
Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria Coyoacán, 04510 México DF, Mexico
Narayanan J.:
División Ingeniería en Nanotecnología, Universidad Politecnica Del Valle de México, Av. Mexiquense, Tultitlan Estado de México CP 54910, Mexico
Hofeld H.:
Centro de Investigación Química, Universidad Autónoma Del Estado de Morelos, Ave. Universidad 1001, Cuernavaca Morelos CP 62210, Mexico
Pandiyan T.:
Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico
Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria Coyoacán, 04510 México DF, Mexico
Singh N.:
Department of Chemistry, Indian Institute of Technology Ropar (IIT Ropar), Rupnagar Punajb 140001, India
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