Purification of Laboratory Chemicals

Purification of Laboratory Chemicals

Dibromomanganese(II) complexes with hexamethylphosphoramide and phenylphosphonic bis(diamide) ligands

Tetrahedral dibromomanganese(II) complexes having formulas [MnBr2{O = PR(NMe2)2}2] (R = NMe2 (1); Ph (2)) were isolated and characterized by single crystal X-ray diffraction. [MnBr2{O = P(NMe2)3}2] (1) crystallizes in the monoclinic C2/c space group. The asymmetric unit contains one half of the molecule with the Mn(II) atom in a distorted tetrahedral coordination. The intermolecular network of this coordination compound was studied by generating and inspecting its Hirshfeld surface, while the weak intramolecular hydrogen bonds were investigated computationally by AIM analysis in the gas phase and in solution. The Hirshfeld analysis was extended to the related [MnBr2{O = PPh(NMe2)2}2] complex (2)

1,3-Dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide as ligand for the preparation of luminescent lanthanide complexes

Europium(III) coordination compounds having general formula [Eu(beta-dike)(3)L-2] (beta-dike=dibenzoylmethanate, tenoyltrifluoroacetonate; L=1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide) were isolated and characterized. The complexes exhibited bright red emission associated to the D-5(0)-> F-7(J) transitions of the metal center upon excitation with near-UV light, with intrinsic quantum yields around 51% and 65%, respectively, for the dibenzoylmethanate and tenoyltrifluoroacetonate derivatives. More information about the behavior of 1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide as an antenna-ligand towards trivalent lanthanide ions was obtained by its coordination to [Ln(NO3)(3)] (Ln=Eu, Gd, Tb) metal fragments.[GRAPHICS].Europium(III) coordination compounds having general formula [Eu(β-dike)3L2] (β-dike = dibenzoylmethanate, tenoyltrifluoroacetonate; L = 1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide) were isolated and characterized. The complexes exhibited bright red emission associated to the 5D0→7FJ transitions of the metal center upon excitation with near-UV light, with intrinsic quantum yields around 51% and 65%, respectively, for the dibenzoylmethanate and tenoyltrifluoroacetonate derivatives. More information about the behavior of 1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide as an antenna-ligand towards trivalent lanthanide ions was obtained by its coordination to [Ln(NO3)3] (Ln = Eu, Gd, Tb) metal fragments