dc.contributor.author | Odhiambo, Ruth A. | |
dc.contributor.author | Aluoch, Austin O. | |
dc.contributor.author | Njenga, Lydia W. | |
dc.contributor.author | Kagwanja, Stanley M. | |
dc.contributor.author | Wandiga, Shem O. | |
dc.contributor.author | Wendt, Ola F. | |
dc.date.accessioned | 2021-01-04T06:37:19Z | |
dc.date.available | 2021-01-04T06:37:19Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Odhiambo RA, Aluoch AO, Njenga LW, Kagwanja SM, Wandiga SO, Wendt OF. "Synthesis, Characterization and Ion-Binding Properties of Oxathiacrown Ethers Appended to [Ru(bpy)2]2+: Selectivity Towards Hg2+, Cd2+ and Pb2+." RSC advances. 2018;8(7):3663-3672. | en_US |
dc.identifier.uri | http://erepository.uonbi.ac.ke/handle/11295/153564 | |
dc.description.abstract | A series of complexes with oxathiacrown ethers appended to a [Ru(bpy)2]2+ moiety have been synthesized
and characterized using 1H NMR, 13C NMR, IR, electronic absorption and emission spectroscopes, mass
spectrometry and elemental analyses. The complexes exhibit strong MLCT luminescence bands in the
range 608–611 nm and one reversible metal centred oxidation potential in the range 1.00–1.02 V. Their
selectivity and sensitivity towards Hg2+, Cd2+ and Pb2+ metal ions have been investigated using
electronic absorption, luminescence, cyclic and differential pulse voltammetry titrations. Their responses
towards selected cations and anions have also been investigated using electronic absorption and
luminescence. While the complexes are selective towards Hg2+ and Cd2+ ions, none of them is selective
towards Pb2+ ions. In particular, complex 2 gives a selective change in the UV/Vis absorbance with Hg2+
making it possible to detect mercury down to a detection limit of 68 ppm. The binding constants and
limits of detection of the complexes have been calculated, with values ranging from 4.37 to 5.38 and 1.4
10 3 to 6.8 10 5 for log Ks and LOD respectively. | en_US |
dc.language.iso | en | en_US |
dc.publisher | University of Nairobi | en_US |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
dc.title | Synthesis, Characterisation and Ion-binding Properties of Oxathiacrown Ethers Appended to [ru(Bpy)2]2+. Selectivity Towards Hg2+, Cd2+ and Pb2+ | en_US |
dc.type | Article | en_US |