Alternate Cu2 and Er2 spin carriers in a carboxylate-bridged chain: EPR study

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We report powder EPR measurements at 9.48 GHz and temperatures of 4 K ≤ T ≤ 300 K and at 33.86 GHz and T = 300 K for the polymeric compound {[Cu 2Er2(L)10(H2O)4].3H 2O)n (HL = frans-2-butenoic acid) having alternate Cu 2 and Er2 dinuclear units bridged by carboxylates along a chain. Above 70 K, when...

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Autor principal: Calvo, Rafael A.
Otros Autores: Rapp, R.E, Sartoris, R.P, Santana, R.C, Perec, M.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2009
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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024 7 |2 scopus  |a 2-s2.0-68149119333 
024 7 |2 cas  |a copper, 15158-11-9, 7440-50-8; erbium, 7440-52-0; Carboxylic Acids; Copper, 7440-50-8; Erbium, 7440-52-0 
030 |a JPCAF 
040 |a Scopus  |b spa  |c AR-BaUEN  |d AR-BaUEN 
100 1 |a Calvo, Rafael A. 
245 1 0 |a Alternate Cu2 and Er2 spin carriers in a carboxylate-bridged chain: EPR study 
260 |c 2009 
270 1 0 |m Calvo, R.; Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, INTEC (CONICET-UNL), Güemes 3450, 3000 Santa Fe, Argentina; email: calvo@fbcb.unledu.ar 
504 |a Bencini, A., Benelli, C., Caneschi, A., Carlin, R.L., Dei, A., Gatteschi, D., (1985) J. Am. Chem. Soc, 107, pp. 8128-8136 
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504 |a Kahn, O., (1993) Molecular Magnetism, , VCH: New York 
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504 |a Andruh, M., Costes, J.-P., Diaz, C., Gao, S., (2009) Inorg. Chem, 48, pp. 3342-3359 
504 |a Caneschi, A., Sorace, L., Casellato, U., Tomasin, P., Vigato, P.A., (2004) Eur. J. Inorg. Chem, pp. 3887-3900 
504 |a Tangoulis, V., Costes, J.-P., (2007) Chem. Phys, 334, pp. 77-84 
504 |a Calvo, R., (2007) Appl. Magn. Reson, 31, pp. 271-299 
504 |a Calvo, R.; Rapp, R. E.; Chagas, E.; Sartoris, R. P.; Baggio, R.; Garland, M. T.; Perec, M. Inorg. Chem. 2008, 47, 10389-10397. The crystallographic information file (cif) containing the reported structural data for [Cu2Er2]n may be obtained from the Cambridge Crystallographic Data Centre (CCDC) as supporting information under number 687242, http:// www.ccdc.cam.ac.uk/cgi-bin/catreq.cgi; Stoll, S., (2003) Int. EPR Soc. Newsletter, 13, pp. 24-26 
504 |a Stoll, S., Schweiger, A., (2006) J. Magn. Reson, 178, pp. 42-55 
504 |a Atherton, N.M., (1993) Principles of Electron Spin Resonance, , Ellis Horwood: Chichester/Prentice-Hall: New York 
504 |a Weil, J.A., Bolton, J.R., Wertz, J.E., (1994) Electron Paramagnetic Resonance: Elementary Theory and Practical Applications, , Wiley: New York 
504 |a Wasson, J.R., Shyr, C.I., Trapp, C., (1968) Inorg. Chem, 7, p. 469473 
504 |a Schlam, R., Perec, M., Calvo, R., Lezama, L., Insausti, M., Rojo, T., Foxman, B.M., (2000) Inorg. Chim. Acta, 310, pp. 81-88 
504 |a Sebastian, S.E., Tanedo, P., Goddar, P.A., Lee, S.-C., Wilson, A., Kim, S., Cox, S., Fisher, I.R., (2006) Phys. Rev. B, 74, p. 180401 
504 |a Napolitano, L.M.B., Nascimento, O.R., Cabaleiro, S., Castro, J., Calvo, R., (2008) Phys. Rev B, 77, p. 214423 
504 |a Finn, C.B., Orbach, R., Wolf, W.P., (1961) Proc. Phys. Soc, London, 77, pp. 261-268 
504 |a Orbach, R., (1961) Proc. R. Soc. London, A264, pp. 485-495. , 458-484 
504 |a Bleaney, B., Bowers, K.D., (1952) Proc. R. Soc. London, 214, pp. 451-465 
504 |a Abragam, A., Bleaney, B., (1970) Electron Paramagnetic Resonance of Transition Ions, , Clarendon Press: Oxford, U.K 
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506 |2 openaire  |e Política editorial 
520 3 |a We report powder EPR measurements at 9.48 GHz and temperatures of 4 K ≤ T ≤ 300 K and at 33.86 GHz and T = 300 K for the polymeric compound {[Cu 2Er2(L)10(H2O)4].3H 2O)n (HL = frans-2-butenoic acid) having alternate Cu 2 and Er2 dinuclear units bridged by carboxylates along a chain. Above 70 K, when the ErIII resonance is unobservable and uncoupled from the CuII ions, the spectrum arises from the excited triplet state of antiferromagnetic Cu2 units, decreasing in intensity as T decreases, and disappearing when these units condensate into the singlet ground state. Fit of a model to the spectra at 9.48 and 33.86 GHz and 300 K gives gcu| = 2.379, gcu- = 2.065, DCu = -0.340 cm-1, and ECu ∼ 0 for the g-factors and zero field splitting parameters. From the T dependence of the intensity of the spectrum above 70 K, we obtain Jcu-cu; = -336(11) cm-1 for the intradinuclear exchange interaction. Below 50 K, a spectrum attributed to Er2 units appears, narrows, and resolves as T decreases, due to the increase of the spin-lattice relaxation time T1. The spectrum at 4 K allows calculating g values g1 = 1.489, g2 = 2.163, and g 3 = 5.587 and zero field splitting parameters DEr = -0.237 cm-1 and EEr = 0.020 cm-1. The results are discussed in terms of the properties of the Cu and Er ions, and the crystal structure of the compound. © 2009 American Chemical Society.  |l eng 
593 |a Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, INTEC (CONICET-UNL), Güemes 3450, 3000 Santa Fe, Argentina 
593 |a Instituto de Física, Universidade Federal do Rio de Janeiro, 21941-972, Rio de Janeiro, RJ, Brazil 
593 |a Instituto de Física, Universidade Federal de Goiás, CP 131, 74001-970, Goiania, GO, Brazil 
593 |a Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina 
690 1 0 |a ANTIFERROMAGNETICS 
690 1 0 |a DINUCLEAR UNITS 
690 1 0 |a EPR MEASUREMENTS 
690 1 0 |a EPR STUDIES 
690 1 0 |a EXCITED TRIPLET STATE 
690 1 0 |a G FACTORS 
690 1 0 |a G-VALUES 
690 1 0 |a POLYMERIC COMPOUNDS 
690 1 0 |a SINGLET GROUND STATE 
690 1 0 |a SPIN CARRIERS 
690 1 0 |a UNOBSERVABLE 
690 1 0 |a ZERO-FIELD SPLITTING PARAMETERS 
690 1 0 |a ANTIFERROMAGNETISM 
690 1 0 |a CARBOXYLATION 
690 1 0 |a CRYSTAL STRUCTURE 
690 1 0 |a ELECTRON RESONANCE 
690 1 0 |a ELECTRON SPIN RESONANCE SPECTROSCOPY 
690 1 0 |a ERBIUM 
690 1 0 |a PARAMAGNETIC RESONANCE 
690 1 0 |a QUANTUM THEORY 
690 1 0 |a SPIN DYNAMICS 
690 1 0 |a ERBIUM COMPOUNDS 
690 1 0 |a CARBOXYLIC ACID 
690 1 0 |a COPPER 
690 1 0 |a ERBIUM 
690 1 0 |a CHEMISTRY 
690 1 0 |a ELECTRON SPIN RESONANCE 
690 1 0 |a LETTER 
690 1 0 |a MAGNETISM 
690 1 0 |a TEMPERATURE 
690 1 0 |a CARBOXYLIC ACIDS 
690 1 0 |a COPPER 
690 1 0 |a ELECTRON SPIN RESONANCE SPECTROSCOPY 
690 1 0 |a ERBIUM 
690 1 0 |a MAGNETICS 
690 1 0 |a TEMPERATURE 
700 1 |a Rapp, R.E. 
700 1 |a Sartoris, R.P. 
700 1 |a Santana, R.C. 
700 1 |a Perec, M. 
773 0 |d 2009  |g v. 113  |h pp. 8830-8833  |k n. 31  |p J Phys Chem A  |x 10895639  |t Journal of Physical Chemistry A 
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856 4 0 |u https://doi.org/10.1021/jp905310t  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_10895639_v113_n31_p8830_Calvo  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10895639_v113_n31_p8830_Calvo  |y Registro en la Biblioteca Digital 
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