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Three-dimensional lanthanide-organic frameworks based on di-, tetra-, and hexam...
Shi, Fa-Nian; Cunha-Silva, Luis; Trindade, Tito; Paz, Filipe A. Almeida; Rocha, JoaoThree-dimensional lanthanide-organic frameworks formulated as (CH3)2NH2[Ln(pydc)2] · 1/2H2O [Ln3+ ) Eu3+ (1a) or Er3+ (1b); pydc2- corresponds to the diprotonated residue of 2,5-pyridinedicarboxylic acid (H2pydc)], [Er4(OH)4(pydc)4(H2O)3] ·H2O (2), and [PrIII 2PrIV 1.25O(OH)3(pydc)3] (3) have been isolated from typical solvothermal (1a and 1b in N,N-dimethylformamide - DMF) and hydrothermal (2 and 3) syntheses....
Synthesis, structure and magnetic behaviour of mixed metal leucophosphite
Shi, Fa-Nian; Santos, António Moreira dos; Cunha-Silva, Luís; Costa, Benilde F.O.; Klinowski, Jacek; Paz, Filipe A. Almeida; Amaral, Vítor S.A synthetic analogue of leucophosphite, an iron phosphate, was synthesized hydrothermally at 180 °C and its chemical composition determined to be K[(FeV)(PO4)2(OH)(H2O)]·H2O. The compound crystallizes in the monoclinic P21/c space group, with a=9.7210(19) Å, b=9.6500(19) Å, c=12.198(4) Å and [beta]=128.569(18)°. While the original all-iron compound is reported to be antiferromagnetic, the inclusion of substitut...
Hydro-ionothermal synthesis of lanthanide-organic frameworks with 1,4-phenylene...
Shi, Fa-Nian; Trindade, Tito; Rocha, João; Paz, Filipe A. AlmeidaA synthetic approach combining hydrothermal and ionothermal (eutectic mixture of choline chloride and malonic acid) procedures is proposed that allowed the isolation of the first lanthanide-organic frameworks with residues of 1,4-phenylenebis(methylene)- diphosphonic acid (H4pmd), [Ln(Hpmd)(H2O)] (where Ln3+ ) Ce3+ and Pr3+), exhibiting an unprecedented trinodal topology with 3- and 8-connected nodes. The struc...
Heterodimetallic germanium(IV) complex structures with transition metals
Shi, Fa-Nian; Cunha-Silva, Luís; Hardie, Michaele J.; Trindade, Tito; Paz, Filipe A. Almeida; Rocha, JoãoThe hydrothermal synthesis and structural characterization of a number of complex compounds containing the divalent tris(oxalato-O,O¢)germanate anion, [Ge(C2O4)3]2-, or the neutral bis(oxalate-O,O¢)germanium fragment, [Ge(C2O4)2], with transition-metal (M) cationic complexes of 1,10¢-phenanthroline (phen) is reported: [M(phen)3]- [Ge(C2O4)3]âxH2O [where M2+ ) Cu2+ (1a and 1b), Fe2+ (2a and 2b), Ni2+ (3), Co2+ (...
catena-[1,3-diammoniopropane di-mu2-hydroxodi-mu4-phosphato-trioxotrivanadium d...
Paz, Filipe A. Almeida; Shi, Fa-Nian; Trindade, Tito; Rocha, João; Klinowski, JacekThe crystal structure of the title compound, (C3H12N2)- [V3O3(OH)2(PO4)2] 2H2O, has been reported by Soghomonian et al. [Chem. Mater. (1993), 5, 1690±1691]. We present here a redetermination of greatly improved precision and at a low temperature of 180 (2) K. The H atoms connected to oxygen have been successfully located and the coordination environments of the two crystallographically independent vanadium cent...
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