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Gerard, M.F.; Aiassa, C.; Casado, N.M.C.; Santana, R.C.; Perec, M.; Rapp, R.E.; Calvo, R. "Magnetic properties and EPR spectra of [Cu(L-arginine)2](NO3)2·3H2O" (2007) Journal of Physics and Chemistry of Solids. 68(8):1533-1539
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Abstract:

Magnetic and EPR data have been collected for complex [Cu(L-Arg)2](NO3)2·3H2O (Arg=arginine). Magnetic susceptibility χ in the temperature range 2-160 K, and a magnetization isotherm at T=2.29(1) K with magnetic fields between 0 and 9 T were measured. The observed variation of χT with T indicates predominant antiferromagnetic interactions between Cu(II) ions coupled in 1D chains along the b axis. Fitting a molecular field model to the susceptibility data allows to evaluate g=2.10(1) for the average g-factor and J=-0.42(6) cm-1 for the nearest neighbor exchange coupling (defined as Hex = - ∑ Jij Si · Sj). This coupling is assigned to syn-anti equatorial-apical carboxylate bridges connecting Cu(II) ion neighbors at 5.682 Å, with a total bond length of 6.989 Å and is consistent with the magnetization isotherm results. It is discussed and compared with couplings observed in other compounds with similar exchange bridges. EPR spectra at 9.77 were obtained in powder samples and at 9.77 and at 34.1 GHz in the three orthogonal planes of single crystals. At both microwave frequencies, and for all magnetic field orientations a single signal arising from the collapse due to exchange interaction of resonances corresponding to two rotated Cu(II) sites is observed. From the EPR results the molecular g-tensors corresponding to the two copper sites in the unit cell were evaluated, allowing an estimated lower limit |J |>0.1 cm-1 for the exchange interaction between Cu(II) neighbors, consistent with the magnetic measurements. The observed angular variation of the line width is attributed to dipolar coupling between Cu(II) ions in the lattice. © 2007 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Magnetic properties and EPR spectra of [Cu(L-arginine)2](NO3)2·3H2O
Autor:Gerard, M.F.; Aiassa, C.; Casado, N.M.C.; Santana, R.C.; Perec, M.; Rapp, R.E.; Calvo, R.
Filiación:Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral and INTEC (CONICET-UNL), Güemes 3450, 3000 Santa Fe, Argentina
Instituto de Física, Universidade Federal de Goiás, Campus Samambaia, CP 131, 74001-970 Goiânia, GO, Brazil
Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, INQUIMAE, Ciudad Universitaria, Pabellon II, 1428 Buenos Aires, Argentina
Instituto de Física, Universidade Federal do Rio de Janeiro, CP 68528, 21941-972 Rio de Janeiro, RJ, Brazil
Palabras clave:D. Electron paramagnetic resonance; D. Magnetic properties; Antiferromagnetic interactions; Magnetic measurements; Magnetization isotherm; Molecular field model; Antiferromagnetism; Magnetic couplings; Magnetic fields; Magnetization; Paramagnetic resonance; Copper compounds
Año:2007
Volumen:68
Número:8
Página de inicio:1533
Página de fin:1539
DOI: http://dx.doi.org/10.1016/j.jpcs.2007.03.032
Título revista:Journal of Physics and Chemistry of Solids
Título revista abreviado:J Phys Chem Solids
ISSN:00223697
CODEN:JPCSA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223697_v68_n8_p1533_Gerard

Referencias:

  • Ohata, N., Masuda, H., Yamauchi, O., (1996) Angew. Chem. Int. Ed. Engl., 35, p. 531
  • Yamauchi, O., Odani, A., Takani, M., (2002) J. Chem. Soc, Dalton. Trans., p. 3411
  • Lippard, S.J., Berg, J.M., (1994) Principles of Bioinorganic Chemistry, , University Science Books, Mill Valley CA
  • Solomon, E.I., Wilcox, D.E., (1985) Magneto Structural Correlations in Exchange Coupled Systems, p. 463. , Willet R.D., Gatteschi D., and Kahn O. (Eds), Reidel, Dordrecht
  • Bominaar, E.L., Achim, C., Borshch, S.A., Girerd, J.J., Münck, E., (1997) Inorg. Chem., 36, p. 3689
  • Chen, P., Solomon, E.I., (2004) Proc. Natl. Acad. Sci. USA, 101, p. 13105
  • Weiss, E.A., Wasielewski, M.R., Ratner, M.A., (2005) J. Chem. Phys., 123, p. 064504
  • Kahn, O., (1993) Molecular Magnetism, , VCH, New York
  • Calvo, R., (2007) Appl. Magn. Reson., 31, p. 271
  • Masuda, H., Odani, A., Yamazaki, T., Yahima, T., Yamauchi, O., (1993) Inorg. Chem., 32, p. 1111
  • Ohata, N., Masuda, H., Yamauchi, O., (2000) Inorg. Chim. Acta, 300-302, p. 749
  • Duarte, M.T.L.S., Carrondo, M.A.A.F.D., Goncalves, M.L.S., Hursthouse, M.B., Walker, N.P.C., Dawes, H.M., (1986) Inorg. Chim. Acta, 124, p. 41
  • Viera, I., Torre, M.H., Piro, O.E., Castellano, E.E., Baran, E.J., (2005) J. Inorg. Biochem., 99, p. 1250
  • Ohata, N., Masuda, H., Yamauchi, O., (1999) Inorg. Chim. Acta, 286, p. 37
  • Vilar, R., (2003) Angew. Chem. Int. Ed., 42, p. 1460
  • Bruno, I.J., Cole, J.C., Edington, P.R., Kessler, M., Macrae, C.F., McCabe, P., Pearson, J., Taylor, R., (2002) Acta Crystallogr. B, 58, p. 389
  • O'Connor, C.J., (1982) Prog. Inorg. Chem., 29, p. 203
  • Stoll, S., Schweiger, A., (2006) J. Magn. Reson., 178, p. 42
  • Abe, H., Ono, K., (1956) J. Phys. Soc. Jpn., 11, p. 947
  • Billing, D.E., Hathaway, B.J., (1969) J. Chem. Phys., 50, p. 1476
  • Calvo, R., Mesa, M., (1983) Phys. Rev. B, 28, p. 1244
  • Zweiger, H.J., Pratt, G.W., (1973) Magnetic Interactions in Solids, , Oxford University Press, London
  • Gennaro, A.M., Levstein, P.R., Steren, C.A., Calvo, R., (1987) Chem. Phys., 111, p. 431
  • Levstein, P.R., Steren, C.A., Gennaro, A.M., Calvo, R., (1988) Chem. Phys., 120, p. 449
  • Costa-Filho, A.J., Nascimento, O.R., Ghivelder, L., Calvo, R., (2001) J. Phys. Chem. B, 105, p. 5039
  • Costa Filho, A.J., Nascimento, O.R., Calvo, R., (2004) J. Phys. Chem. B, 108, p. 9549
  • Vieira, E.D., Casado, N.M.C., Facchin, G., Torre, M.H., Nascimento, O.R., Costa-Filho, A.J., Calvo, R., (2006) Inorg. Chem., 45, p. 2942
  • Levstein, P.R., Calvo, R., (1990) Inorg. Chem., 29, p. 1581
  • Colacio, E., Ghazi, M., Kivekäs, R., Moreno, J.M., (2000) Inorg. Chem., 39, p. 2882. , and references therein
  • Schveigkardt, J.M., Rizzi, A.C., Piro, O.E., Castellano, E.E., Santana, R.C., Calvo, R., Brondino, C.D., (2002) Eur. J. Inorg. Chem., 2002, p. 2913
  • Allen, F.H., (2002) Acta Crystallogr. B, 58, p. 380
  • Orpen, A.G., (2002) Acta Crystallogr. B, 58, p. 398

Citas:

---------- APA ----------
Gerard, M.F., Aiassa, C., Casado, N.M.C., Santana, R.C., Perec, M., Rapp, R.E. & Calvo, R. (2007) . Magnetic properties and EPR spectra of [Cu(L-arginine)2](NO3)2·3H2O. Journal of Physics and Chemistry of Solids, 68(8), 1533-1539.
http://dx.doi.org/10.1016/j.jpcs.2007.03.032
---------- CHICAGO ----------
Gerard, M.F., Aiassa, C., Casado, N.M.C., Santana, R.C., Perec, M., Rapp, R.E., et al. "Magnetic properties and EPR spectra of [Cu(L-arginine)2](NO3)2·3H2O" . Journal of Physics and Chemistry of Solids 68, no. 8 (2007) : 1533-1539.
http://dx.doi.org/10.1016/j.jpcs.2007.03.032
---------- MLA ----------
Gerard, M.F., Aiassa, C., Casado, N.M.C., Santana, R.C., Perec, M., Rapp, R.E., et al. "Magnetic properties and EPR spectra of [Cu(L-arginine)2](NO3)2·3H2O" . Journal of Physics and Chemistry of Solids, vol. 68, no. 8, 2007, pp. 1533-1539.
http://dx.doi.org/10.1016/j.jpcs.2007.03.032
---------- VANCOUVER ----------
Gerard, M.F., Aiassa, C., Casado, N.M.C., Santana, R.C., Perec, M., Rapp, R.E., et al. Magnetic properties and EPR spectra of [Cu(L-arginine)2](NO3)2·3H2O. J Phys Chem Solids. 2007;68(8):1533-1539.
http://dx.doi.org/10.1016/j.jpcs.2007.03.032