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Sartoris, R.P.; Santana, R.C.; Baggio, R.F.; Peña, O.; Perec, M.; Calvo, R. "Pyrophosphate-bridged CuII chain magnet: {[Na 3Cu(P2O7)(NO3)]•3H 2O}n" (2010) Inorganic Chemistry. 49(12):5650-5657
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Abstract:

A CuII⋯CuII pyrophosphate-bridged compound of formula {[Na3Cu(P2O7)(NO3)] •3H2O}n (1) has been characterized. X-ray diffraction measurements show that it crystallizes in the monoclinic space group P2 1/m, with unit cell dimensions a = 7.2492(5) Å, b = 8.2446(6) Å, c = 9.9050(7) Å, β = 107.123(1)°, and Z = 2. The structure consists of chains of CuII cations at inversion symmetry sites bound to four equatorial oxygen atoms provided by two pyrophosphate anions halved by a symmetry plane and two axial oxygen atoms of nitrate anions. The molar magnetic susceptibility ξ0 of a powdered sample was measured in the temperature range 2 K < T < 273 K, and an isothermal magnetization curve, M(B0,T), was obtained at T = 30 K, with the magnetic field B0 between 0 and 5 T. Fitting a spin-chain model to the susceptibility data, we evaluate an antiferromagnetic exchange coupling 2J = -24.3(1) cm-1 (defined as ℋex = -2JS iSj) between CuII neighbors. For any orientation of B0, single-crystal electron paramagnetic resonance (EPR) spectra obtained at 9.8 and 33.9 GHz at 300 K display a single signal having a g matrix with orthorhombic symmetry, arising from the merger produced by the exchange interaction of the resonances corresponding to the two rotated CuII sites. The g matrices of the individual molecules calculated assuming axial symmetry yielded principal values g∥ = 2.367(1) and g⊥ = 2.074(1) at both frequencies, indicating a d x 2-y2 ground-state orbital for the Cu II ions. The angular variation of the EPR line width suggests exchange narrowing in a system with one-dimensional spin dynamics, as expected from the structure and susceptibility data. The results, discussed in terms of the crystal and electronic structures and of the spin dynamics of the compound, are compared with those obtained in other materials. © 2010 American Chemical Society.

Registro:

Documento: Artículo
Título:Pyrophosphate-bridged CuII chain magnet: {[Na 3Cu(P2O7)(NO3)]•3H 2O}n
Autor:Sartoris, R.P.; Santana, R.C.; Baggio, R.F.; Peña, O.; Perec, M.; Calvo, R.
Filiación:Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional Del Litoral and INTEC (CONICET-UNL), Güemes 3450, 3000 Santa Fe, Argentina
Universidade Federal de Goiás, Campus Samambaia, CP 131, 74001-970 Goiânia, Brazil
Comisión Nacional de Energía Atómica, Avenida Gral Paz 1499, 1650 San Martín, Buenos Aires, Argentina
Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, 35042 Rennes, France
Facultad de Ciencias Exactas y Naturales, INQUIMAE, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina
Palabras clave:copper; organometallic compound; pyrophosphate; article; chemical structure; chemistry; magnetism; synthesis; temperature; X ray crystallography; Copper; Crystallography, X-Ray; Diphosphates; Magnetics; Models, Molecular; Organometallic Compounds; Temperature
Año:2010
Volumen:49
Número:12
Página de inicio:5650
Página de fin:5657
DOI: http://dx.doi.org/10.1021/ic100398k
Título revista:Inorganic Chemistry
Título revista abreviado:Inorg. Chem.
ISSN:00201669
CODEN:INOCA
CAS:copper, 15158-11-9, 7440-50-8; pyrophosphate, 14000-31-8, 7722-88-5, 7758-16-9; Copper, 7440-50-8; Diphosphates; Organometallic Compounds
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201669_v49_n12_p5650_Sartoris

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Citas:

---------- APA ----------
Sartoris, R.P., Santana, R.C., Baggio, R.F., Peña, O., Perec, M. & Calvo, R. (2010) . Pyrophosphate-bridged CuII chain magnet: {[Na 3Cu(P2O7)(NO3)]•3H 2O}n. Inorganic Chemistry, 49(12), 5650-5657.
http://dx.doi.org/10.1021/ic100398k
---------- CHICAGO ----------
Sartoris, R.P., Santana, R.C., Baggio, R.F., Peña, O., Perec, M., Calvo, R. "Pyrophosphate-bridged CuII chain magnet: {[Na 3Cu(P2O7)(NO3)]•3H 2O}n" . Inorganic Chemistry 49, no. 12 (2010) : 5650-5657.
http://dx.doi.org/10.1021/ic100398k
---------- MLA ----------
Sartoris, R.P., Santana, R.C., Baggio, R.F., Peña, O., Perec, M., Calvo, R. "Pyrophosphate-bridged CuII chain magnet: {[Na 3Cu(P2O7)(NO3)]•3H 2O}n" . Inorganic Chemistry, vol. 49, no. 12, 2010, pp. 5650-5657.
http://dx.doi.org/10.1021/ic100398k
---------- VANCOUVER ----------
Sartoris, R.P., Santana, R.C., Baggio, R.F., Peña, O., Perec, M., Calvo, R. Pyrophosphate-bridged CuII chain magnet: {[Na 3Cu(P2O7)(NO3)]•3H 2O}n. Inorg. Chem. 2010;49(12):5650-5657.
http://dx.doi.org/10.1021/ic100398k