7 documents found, page 1 of 1
Synthesis, structural characterization, cytotoxic properties and DNA binding of...
Leite Ferreira, B. J. M.; Brandao, P.; Meireles, M.; Martel, Fátima; Correia-Branco, Ana; Fernandes, Diana M.; Santos, T. M.; Felix, V.In this study a novel dinuclear copper(II) complex with adenine and phenanthroline has been synthesized and its structure determined by single crystal X-ray diffraction. In the dinuclear complex [Cu-2(mu-adenine)(2)(phen)(2)(H2O)2](NO3)(4)center dot 0.5H(2)O (phen = 1,10-phenanthroline) (1) the two Cu(II) centres exhibit a distorted square pyramidal coordination geometry linked by two nitrogen donors from adeni...
Carboxylate-based molecular magnet: One path toward achieving stable quantum co...
Cruz, C.; Soares-Pinto, D. O.; Brandao, P.; dos Santos, A. M.; Reis, M. S.The control of quantum correlations in solid-state systems by means of material engineering is a broad avenue to be explored, since it makes possible steps toward the limits of quantum mechanics and the design of novel materials with applications on emerging quantum technologies. In this context, this letter explores the potential of molecular magnets to be prototypes of materials for quantum information techno...
Cs2NaAl1-xCrxF6: A family of compounds presenting magnetocaloric effect
Pedro, S. S.; Tedesco, J. C. G.; Yokaichiya, F.; Brandao, P.; Gomes, A. M.; Landsgesell, S.; Pires, M. J. M.; Sosman, L. P.; Mansanares, A. M.In this paper we explore the magnetocaloric effect (MCE) of chromium-doped elpasolite Cs2NaAl1-x,CrxF6 (x = 0.01 and 0.62) single crystals. Magnetization and heat capacity data show the magnetocaloric potentials to be comparable to those of garnets, perovskites, and other fluorides, producing magnetic entropy changes of 0.5 J/kg K (x = 0.01) and 11 J/kg K (x = 0.62), and corresponding adiabatic temperature chan...
A new metal organic framework constructed of Co(II) ions six and seven-coordina...
Pedro, S. S.; Brandao, P.; Shi, F. -N.; Tedesco, J. C. G.; Reis, M. S.In this work are presented the synthesis, structure and magnetic measurements for the [Co(mu(2)-biim)(6) 2Co(mu-H2O)(OH)(6)] (biim = 2,2'-biimidazole) metal-organic framework. The compound crystallizes in the cubic system, space group Pa (3) over bar (a = 16.0312(6) angstrom, V = 4120.0(3) angstrom(3) and Z = 4), containing two crystallo-graphically distinct divalent cobalt ions Co(1) and Co(2) six- and seven-c...
Synthesis, characterization and magnetic properties of a manganese (II) silicat...
Brandao, P.; dos Santos, A. M.; Paixao, L. S.; Reis, M. S.The hydrothermal synthesis, structural characterization and magnetic properties of a manganese silicate with ideal formula of NaMn2Si3O8(OH) is reported. This compound is a synthetic analog to the naturally occurring mineral Serandite. The crystal structure comprises MnO6 octahedra and SiO4 tetrahedra. The MnO6 share four edges with neighboring octahedra forming double chains. These chains are connected by sili...
New manganese (II) structures derived from 2,6-dichlorobenzoic acid: Syntheses,...
Esteves, D.; Tedesco, J. C. D.; Pedro, S. S.; Cruz, C.; Reis, M. S.; Brandao, P.One novel coordination polymer [Mn-2(mu-2,6-DCBA)(3)(mu(2)-CH3CO2)(2)(2H(2)O)]center dot 2H(2)O (2,6-DCBA = 2,6-dichlorobenzoato) (compound 1) has been synthesized by self-assembly of bridging ligand 2,6-dichlorobenzoic acid and manganese acetate tetrahydrate. Single crystal X-ray diffraction analysis reveals that this compound crystallizes in space group P2(1)/c with a = 10.1547(7), b = 24.5829(2), c = 12.6606...
Magnetic Dimensionality of Metal Formate M[(H2O)(2)(HCOO)(2)] Compounds (M = Co...
Sousa, L. L. L.; Barbosa, G. F.; Machado, F. L. A.; Araujo, L. R. S.; Brandao, P.; Reis, M. S.; Rocco, D. L.The magnetic properties of two metal formate systems with formula M[(H2O)(2)(HCOO)(2)], which are isostructural, are described (M = Co, Cu). These compounds contain two different crystallographic metal centers (M2+), in octahedral coordination, which are connected through (HCOO) bridges, leading to the formation of two types of infinite chains: M(1) - HCOO - M(2) and M(1) - HCOO - M(1). The packing of these cha...