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- W1530131545 abstract "This research focused primarily on the induction of fluorescence by secondaryligands in solution. The Zn2+ ion, when complexed to fluorophoric ligands, is known toenhance the intensity of emission. With this in mind, both a fluorescence-quenchingmetal ion and a metal ion isoelectronic to Zn2+ (Ni2+ and In3+, respectively) were utilizedin this research. The high-spin Ni(II) / terpyridine (terpy) complex was studiedextensively due to the tendency of the d8 Ni2+ ion to quench fluorescence. Induction offluorescence was attempted by addition of secondary ligands, primarily CN-. Ligandswere chosen that are high enough in the spectrochemical series such as to increase theenergy gap by raising the energy of the eg degenerate orbitals, giving rise to a low spincomplex that could fluoresce. Although the induction of fluorescence was not achieved,the pK1 and pK2 of the Ni(II) / terpy hydrated complex was found by differential pulsevoltammetry. X-ray crystallography further elucidated the Ni(II)/terpy /CN complex,revealing the two predominant species present, Ni(terpy)2 and [Ni(CN)4 ]2-.The In(III) / 1,10-phenanthroline (phen) complex was analyzed, and was found tofluoresce. NMR and differential pulse voltammetry were utilized for furthercharacterization of In(III) / phen behavior in aqueous solution. LogK1 for the In(III) /phen complex was found by plotting nbar versus pH from the NMR data, and was alsofound by a Nernstian slope obtained from differential pulse voltammetry. The twobinding constants obtained from the two different methodologies differed by 0.2logarithmic units, and were comparable to the literature value." @default.
- W1530131545 created "2016-06-24" @default.
- W1530131545 creator A5071546025 @default.
- W1530131545 date "2009-01-01" @default.
- W1530131545 modified "2023-09-27" @default.
- W1530131545 title "Complexation of metal ions in aqueous solution by fluorescent ligands containing pyridyl groups" @default.
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