Relaxometric studies are still of scientific interest due to their use in medicine and biology. In this study, proton T(1) and T(2) relaxivities of Mn(II), Cu(II) and Cr(III) in water were determined in the presence and absence of various proteins (albumin, alpha-globulin, gamma-globulin, lysozyme, fibrinogen). The 1/T(1) and 1/T(2) in all solutions are linearly proportional to the concentratio...

A new silver aluminium trimangan-ese penta-molybdate {silver(I) trimanganese(II) aluminium penta-kis-[tetra-oxidomolybdate(VI)]}, AgMn(II) 3(Mn(III) 0,26Al0,74)(MoO4)5, has been synthesized using solid-state methods. The structure is composed of M 2O10 dimers, M 3O14 (M = Mn, Al) trimers and MoO4 tetra-hedra sharing corners and forming three types of layers A, B and B'. The sequence of the cons...

High thiophillicicity of the Au-nanoparticle (Au NP) surface leads to covalent attachment of D-penicillamine molecules to Au NPs to form biocompatible D-penicillamine conjugated Au NPs. The latter are highly water-dispersible, exhibit no cytotoxicity, and can readily penetrate the cell membrane to target intracellular free copper ions for selective copper detoxification in the presence of the o...

Mixed ligand complexes of transition metal ions such as Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) have been synthesized using 4-(Benzeneazo)salicylaldehyde, 2-amino-4-nitrophenol and nitrates of respective metal ions. The synthesized complexes have been characterized with infra red (IR), electronic, and H-NMR Spectra, molar conductance and magnetic susceptibility measurements at room t...

In the title compound, {[Mn(C(2)O(4))(C(8)H(7)N(3))]·1.5H(2)O}(n), the Mn(II) ion is chelated by two O,O'-bidentate oxalate ions and an N,N'-bidentate 3-(2-pyrid-yl)pyrazole mol-ecule, resulting in a distorted cis-MnN(2)O(4) octa-hedral geometry for the metal ion. The bridging oxalate ions generate wave-like polymeric chains propagating in [001]. The packing is consolidated by N-H⋯O and O-H⋯O h...

The structure of the title compound, [MnCl(2)(C(5)H(10)O(2))(2)], was solved from low-temperature data collected at 100 (2) K. The asymmetric unit contains one half-mol-ecule with the Mn(II) ion located on a twofold axis. A distorted octa-hedral environment around the Mn atom is formed by two ether and two hydroxyl O atoms of two 2-(hydroxy-methyl)tetra-hydro-furan ligands, and by two chloride ...

The oxygen-evolving complex (OEC) in photosystem II (PS II) was studied in the S0 through S3 states using 1s2p resonant inelastic X-ray scattering spectroscopy. The spectral changes of the OEC during the S-state transitions are subtle, indicating that the electrons are strongly delocalized throughout the cluster. The result suggests that, in addition to the Mn ions, ligands are also playing an ...

The complexation of urea (U) with manganese(II), cobalt(II), iron(III) and copper(II) ions at different temperatures has been studied by many methods namely elemnental analysis, magnetic susceptibility, conductivity measurements, infrared and thermal analysis (TG/DTG), scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), and x-ray powder diffraction (XRD). The high va...

The title compound, [Mn(2)(HO(3)PCH(2)CH(2)COO)(2)(C(8)H(8)N(2))(2)(H(2)O)(2)], was obtained by hydro-thermal synthesis. The manganese(II) ions are six-coordinate and are linked by two 2-carboxy-ethyl-phospho-nate ligands, forming a centrosymmetric dimer. The Mn ions adopts a distorted octahedral coordination geometry. The dimers are further linked by O-H⋯O hydrogen bonds and π-π stacking inter...

des monocristaux de fluoraptite calcique dopes avec des ions mn substitues aux ions ca ont ete prepares en utilisant une methode de synthese qui permet de l'obtenir avec une faible concentration en defauts le long de l'axe senaire helicoidal. dans ces conditions les spectres d'excitation et de rpe montrent que les ions mn se placent uniquement dans ie site ca(l).