Coordination chemistry of a bis(3-hydroxypyran-4-one) with iron and copper
The coordination chemistry of a bis(3-hydroxypyran-4-one) containing two bidentate moieties was investigated with iron and copper. The affinity of this ligand for iron was determined by spectrophotometric titration. Using electrospray ionization mass spectrometry, it was established
that this bis(hydroxypyranone) derivative does not function as a tetradentate ligand, but rather bis-bidentate, forming multinuclear species, with bridged structures. The major iron species under slightly basic conditions are the multiiron complexes Fe2L3, [Fe3L3]2+
, and [Fe3L3(LH)]2+. In contrast speciation with copper is relatively simple, only two species are observed, Cu(LH)2 and Cu2L2.
Keywords: 3-Hydroxypyran-4-one; Bis-bidentate chelator; Copper complex; Iron complex; Speciation
Document Type: Research Article
Affiliations: 1: School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, P.R. China 2: School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, P.R. China 3: Division of Pharmaceutical Science, King’s College London, London, UK
Publication date: 01 September 2013
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