Manganese citrate chemistry: Syntheses, spectroscopic studies, and structural characterizations of novel mononuclear, water-soluble manganese citrate complexes
dc.contributor.author | Matzapetakis, M. | en |
dc.contributor.author | Karligiano, N. | en |
dc.contributor.author | Bino, A. | en |
dc.contributor.author | Dakanali, M. | en |
dc.contributor.author | Raptopoulou, C. P. | en |
dc.contributor.author | Tangoulis, V. | en |
dc.contributor.author | Terzis, A. | en |
dc.contributor.author | Giapintzakis, John | en |
dc.contributor.author | Salifoglou, A. | en |
dc.creator | Matzapetakis, M. | en |
dc.creator | Karligiano, N. | en |
dc.creator | Bino, A. | en |
dc.creator | Dakanali, M. | en |
dc.creator | Raptopoulou, C. P. | en |
dc.creator | Tangoulis, V. | en |
dc.creator | Terzis, A. | en |
dc.creator | Giapintzakis, John | en |
dc.creator | Salifoglou, A. | en |
dc.date.accessioned | 2019-05-06T12:24:09Z | |
dc.date.available | 2019-05-06T12:24:09Z | |
dc.date.issued | 2000 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/48627 | |
dc.description.abstract | The first two mononuclear manganese citrate complexes, (NH4)4[Mn(II)(C6H5O7)2] (1) and (NH4)5[Mn(III)(C6H4O7)2]·2H2O (2) were synthesized in aqueous solutions near physiological pH values. They were isolated in their pure crystalline forms and characterized by elemental analyses and spectroscopic techniques, including UV/visible, electron paramagnetic resonance, Fourier transformed infrared, and magnetic susceptibility measurements. Compound 1 crystallizes in the monoclinic space group P21/c, with a = 8.777(1) Å, b = 13.656(3) Å, c = 9.162(2) Å, β = 113.62(2)°, V = 1006.2(6) Å3, and Z = 2. Compound 2 crystallizes in the triclinic space group P1, with a = 9.606(3) Å, b = 9.914(3) Å, c = 7.247(3) Å, α = 91.05(1)°, β = 105.60(1)°, γ = 119.16(1)°, V = 571.3(3) Å3, and Z = 1. The X-ray crystal structures of 1 and 2 revealed that, in both cases, the manganese ion is six-coordinate and is bound by two citrate ligands in a distorted octahedral fashion. In the case of complex 1, the citrate ion binds to Mn2+ as a triply deprotonated ligand, retaining the central carbon hydroxyl hydrogen, whereas, in the case of compound 2, the citrate ligand coordinates to Mn3+ as a fully deprotonated entity. Compound 2 contains water molecules of crystallization in the unit cell which, through extensive hydrogen-bonding interactions, bestow considerable stability upon the Mn3+-citrate assembly. There are significant contributions to the stabilities of the assembled lattices in 1 and 2 arising from the ammonium counterions neutralizing the high anionic charges of the complexes. The EPR spectra attest to the presence of paramagnetic Mn2+ and Mn3+ species in the solid state. Corroborative evidence is obtained from the magnetic susceptibility measurements in the range 5-300 K. Complexes 1 and 2 present clear cases of mononuclear manganese citrate species relevant to manganese speciation in biological media and potentially related to the beneficial as well as toxic effects of manganese on humans. | en |
dc.language.iso | eng | en |
dc.source | Inorganic chemistry | en |
dc.subject | article | en |
dc.subject | unclassified drug | en |
dc.subject | chemical analysis | en |
dc.subject | synthesis | en |
dc.subject | magnetism | en |
dc.subject | crystal structure | en |
dc.subject | crystallization | en |
dc.subject | manganese derivative | en |
dc.subject | structure analysis | en |
dc.subject | sodium chloride | en |
dc.subject | X ray crystallography | en |
dc.subject | molecular stability | en |
dc.subject | aqueous solution | en |
dc.subject | complex formation | en |
dc.subject | Fourier analysis | en |
dc.subject | citric acid | en |
dc.subject | ligand | en |
dc.subject | pH | en |
dc.subject | solubility | en |
dc.subject | water | en |
dc.subject | ammonia | en |
dc.subject | chemical binding | en |
dc.subject | hydrogen bond | en |
dc.subject | manganese | en |
dc.subject | manganese citrate | en |
dc.subject | solid | en |
dc.title | Manganese citrate chemistry: Syntheses, spectroscopic studies, and structural characterizations of novel mononuclear, water-soluble manganese citrate complexes | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/ic9912631 | |
dc.description.volume | 39 | |
dc.description.startingpage | 4044 | |
dc.description.endingpage | 4051 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering | |
dc.type.uhtype | Article | en |
dc.contributor.orcid | Giapintzakis, John [0000-0002-7277-2662] | |
dc.description.totalnumpages | 4044-4051 | |
dc.gnosis.orcid | 0000-0002-7277-2662 |
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