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Rafael Calvo. Licenciado (1963) y Doctor en Física (1969) del Instituto Balseiro, de Bariloche, Argentina. Investigador Superior Emérito del Consejo Nacional de Investigaciones Científicas y Tecnicas (CONICET, donde trabaja desde 1964), actualmente en el Instituto de Física del Litoral en Santa Fe, Argentina. Profesor Titular Honorario de Física en la Facultad de Bioquímica y Ciencias Biológicas de la Universidad Nacional del Litoral. En los últimos ~60 años Rafael trabajó en áreas de física de la materia condensada, magnetismo molecular, físico-química de materiales y biofísica, publicando más de 160 trabajos en revistas internacionales. En 1993 recibió el Premio Enrique Gaviola en Física Experimental de la Academia de Ciencias Exactas, Físicas y Naturales y en 2007 el Premio Bernardo Houssay del Ministerio de Ciencia y Tecnología (MinCyT), en Argentina. El Dr. Calvo es miembro de la Academia Nacional de Ciencias, Córdoba, Argentina, de la Academia de Ciencias de Latinoamérica y de la Academia de Ciencias Médicas de Santa Fe. Colabora con físicos, químicos y bioquímicos del país y del extranjero en áreas de magnetismo molecular, investigando propiedades de metales de transición y elementos de tierras raras en varios grupos de materiales. Investiga interacciones magnéticas  en moléculas biológicas, metaloproteínas y sistemas modelos, estudiando la síntesis, cristalización, estructura molecular, estructura electrónica e interacciones magnéticas de compuestos metálicos de aminoácidos, péptidos y macromoléculas. Prepara nuevos materiales y estudia sus propiedades usando técnicas espectroscópicas y termodinámicas características de los campos de la física de la materia condensada y el magnetismo, como la resonancia paramagnética electrónica (EPR), ENDOR, medidas magnéticas, calor específico, rayos X, etc., investigando transiciones de fase termodinámicas y cuánticas en esos materiales. Durante mas de 40 años colaboró con el profesor Feher de la Universidad de California, San Diego (USA), investigando estructura y función de centros fotosintéticos usando resonancia magnética y modelado molecular. 

Fue profesor e investigador invitado en Universidades de Estados Unidos, España, Francia, Brasil, Chile y Venezuela, donde ha colaborado en proyectos de investigación que produjeron resultados científicos. Algunas de esas esas colaboraciones continúan.

 Desde 1969 varias generaciones de estudiantes de física, química y biofísica fueron orientados por el Dr. Calvo en sus tesis de grado, posgrado and doctorado. Dirigió en esas áreas 14 tesis de doctorado, dos de maestría y una cantidad mayor de tesinas de grado. Numerosos investigadores realizaron estadías postdoctoral bajo su dirección.

Ver lista de publicaciones científicas y de citas en:

https://publons.com/researcher/2868997/rafael-calvo/

https://scholar.google.com/citations?hl=en&user=k9R17Y0AAAAJ

https://scholar.google.com/citations?user=k9R17Y0AAAAJ&hl=es 

ORCID #  0000-0003-2864-0467 

Publicationes Recientes (desde año 2000)

"Quantum phase transitions probed by EPR spectra in dimeric spin arrays with supramolecular couplings ", Rafael Calvo, Rosana P. Sartoris, Otaciro R. Nascimento, Matúš Šedivý, Antonin Sojka, Petr Neugebauer, Vinicius T. Santana , Coordination Chemistry Reviews, 480, 215007 (2023). DOI: 10.1016/j.ccr.2022.215007

"Exchange couplings and quantum phases in two dissimilar arrays of similar copper dinuclear units". Rosana P. Sartoris, Vinicius T. Santana, Eleonora Freire, Ricardo F. Baggio, Otaciro R. Nascimento and Rafael Calvo, (2020), Dalton Transactions 49, 5228-5440 (2020). DOI: 10.1039/D0DT00567C

"Magnetic-field-tuned phase transition of a molecular material from the isolated-spin to the coupled-spin regime", Vinicius T. Santana, Beatriz N. Cunha, Ana M. Plutín, Rafael G. Silveira, Eduardo E. Castellano, Alzir A.Batista, Rafael Calvo and Otaciro R. Nascimento, Physical Chemistry-Chemical Physics (PCCP), (2019), 42, 4394-4407. DOI: 10.1039/c8cp06719h

"Temperature dependence of the effective interdimer exchange interaction in a weakly coupled antiferromagnetic dimer copper compound" Rafael Calvo, Vinicius T. Santana, Otaciro R. Nascimento (2017), Physical Review B 96, 064424. DOI: 10.1103/PhysRevB.96.064424 for

"Antiferromagnetic spin chain behavior and a transition to 3D magnetic order for Cu(D,L-alanine)2: Roles of H-bonds", Rafael Calvo, Rosana P. Sartoris, Hernán L. Calvo, Edson F. Chagas, Raul E. Rapp. (2016). Solid State Sciences, 55, 144-151, DOI: 10.1016/j.solidstatesciences.2016.03.005 (cover article)

"1D magnetic interactions in Cu(II) oxovanadium phosphates (VPO), Magnetic susceptibility, DFT and single crystal EPR" Diego Venegas Yazigi, Evgenia Spodine, Marianela Saldías, Andrés Vega, Verónica Paredes-García, Rafael Calvo and Ricardo Costa de Santana, (2015). Inorganic Chemistry, 54, 3805-3814. DOI: 10.1021/ic503045d

"Structure and magnetism of a dinuclear CuII pyrophosphate: Transition to a 3D magnetic behavior studied by single crystal EPR", Rosana P. Sartoris, Otaciro R. Nascimento, Ricardo C. Santana, MireillePerec, Ricardo F. Baggio, Rafael Calvo, (2015) Dalton Transactions, 44, 4732-4743. DOI: 10.1039/c3dt32799j

"The structure, magnetism and EPR spectra of a (µ-thiophenolato)(µ-pyrazolato, N, N') double bridged dicopper(II) complex", Narjes Khadir, Davar M. Boghaei, Abdeljalil Assoud, Otaciro R. Nascimento, Amanda Nicotina, Luis Ghivelder, Rafael Calvo, (2015), Dalton Transactions, 44, 2431-2438, DOI: 10.1039/C4DT03322A

"50 Años de electrones resonantes en física, química y bioquímica", Rafael Calvo, Ciencia el Investigación, Reseñas 2, #4, pags. 14-27 (2014).

"Structural and EPR studies of pyrophosphate-bridged dinuclear CuII complexes", Rosana P. Sartoris, Rafael Calvo, Ricardo C. Santana, Otaciro R. Nascimento, Mireille Perec, Ricardo F. Baggio, Polyhedron 79, 178-185 (2014). ISSN: 0277-5387, DOI: 10.1016/j.poly.2014.05.002

“Electron paramagnetic resonance study of ternary CuII compounds with glycine and phenanthroline”, Ricardo C Santana, Anderson B. C. Araújo, Jesiel F. Carvalho, Rafael Calvo, Journal of Chemical Sciences 126, 255-264 (2014) ISSN 0974-3626 , DOI: 10.1007/s12039-013-0553-0

"Structure and magnetism of catena-poly[copper(II)-µ-dichloro-L-lysine]hemihydrate. Copper chains with monochloride bridges", Ricardo C. Santana, Bruno N. Ferreira, José R. Sabino, Jesiel F. Carvalho, Octavio Peña, Rafael Calvo, Polyhedron 47, 53-59 (2012). ISSN: 0277-5387, DOI:10.1016/j.poly.2012.08.045

“Two dinuclear pyrophosphate–bridged copper(II) complexes displaying unusual strong O—H—O interactions”, Mireille Perec, Rosana P. Sartoris, Rafael Calvo, Ricardo F. Baggio. Inorganic Chemistry Communications 21, 141-145 (2012). DOI: 10.1016/j.inoche.2012.05.045

"Exchange interaction through pi-pi stacking in the lamellar [{Cu(bipy)(en)}{Cu(bipy)(H2O)}{VO3}]4n compound", Diego Venegas-Yazigi, Kareen A. Brown, Andrés Vega,Rafael Calvo, Carolina Aliaga, Ricardo C. Santana, Raul Cardoso-Gil, Rüdiger Kniep, Walter Schnelle, Evgenia Spodine. Inorganic Chemistry 50, 11461-11471 (2011). DOI: 10.1021/ic201278a

"Collapse of the EPR fine structure of a 1D array of weakly Interacting binuclear units: A dimensional quantum phase transition", Rafael Calvo, Julián E. Abud, Rosana P. Sartoris, Ricardo C. Santana. Physical Review B 84, 104433(13p) (2011). DOI: 10.1103/PhysRevB.84.104433

"Synthesis and structures of four new compounds of the copper(II)-carboxylate-pyridinecarboxamide system", Mireille Perec, Ricardo F. Baggio, Octavio Peña, Rosana P. Sartoris, Rafael Calvo. Inorganica Chimica Acta 373, 117-123, (2011). DOI: 10.1016/j.ica.2011.03.065

"(µ2-Acetato).(µ2-aqua)(mu2-hydroxo)-bis(1,10-phenanthroline-copper(II)-nitrate).hydrate", Julian E. Abud, Rosana P. Sartoris, Rafael Calvo, Ricardo Baggio, Acta Crystallog. C, C67, m130-m133 (2011). DOI: 10.1107/S0108270111011048

"EPR and magnetic studies of a carboxylate-bridged dinuclear CopperII Compound: Cu2(flu)4(DMF)2", Otaciro R. Nascimento, Lía M. B. Napolitano, María H. Torre, Octavio Peña, Rafael Calvo, Journal of the Brazilian Chemical Society 22, 669-676 (2011). DOI: 10.1590/S0103-50532011000400009

"Pyrophosphate-Bridged CuII Chain Magnet {[Na3Cu(P2O7)(NO3)].3H2O}n", Rosana P. Sartoris, Ricardo C. Santana, Ricardo F. Baggio, Octavio Peña, Mireille Perec, Rafael Calvo,Inorganic Chemistry 49, 5650-5657 (2010). DOI: 10.1021/ic100398k

"Magnetism and Structure in Chains of Copper Dinuclear Paddlewheel Units", Mireille Perec, Ricardo Baggio, Rosana P. Sartoris, Octavio Peña, Rafael Calvo, Inorganic Chemistry 49, 695-703 (2010). DOI: 10.1021/ic902005m

"Alternate Cu2 and Er2 spin carriers in a carboxylate bridged chain: EPR study", Rafael Calvo, Raul E. Rapp, Rosana P. Sartoris, Ricardo C. Santana, Mireille Perec, Journal of Physical Chemistry A, Letters 113, 8830-8833 (2009). DOI: 10.1021/jp905310t

"New copper(II)-radical one dimensional chain: Synthesis, crystal structure, EPR, magnetic properties and DFT calculations", Denise A. Souza, Antonio S. Florencio, Stéphane Soriano, Rafael Calvo, Rosana P. Sartoris, José Walkimar de M. Carneiro, Claudio Sangregorio, Miguel A. Novak, Maria G. F. Vaz, Dalton Transactions 2009, 6816-6824 (2009). DOI: 10.1039/b902967b

"1-D Polymers with alternate Cu2 and Ln2 Units (Ln = Gd, Er, Y) and carboxylate linkages", Rafael Calvo, Raul E. Rapp, Edson Chagas, Rosana P. Sartoris, Ricardo Baggio, María T. Garland, Mireille Perec. Inorganic Chemistry 47 10389-10397 (2008). DOI: 10.1021/ic8014089

"Isotropic and Anisotropic Spin-Spin Interactions and a Quantum Phase Transition in a Dinuclear Cu(II) Compound", Lia M. B. Napolitano, Otaciro R. Nascimento, Santiago Cabaleiro, Jesús Castro, Rafael Calvo, Physical Review B 77, 214423, 1-13 (2008). DOI: 10.1103/PhysRevB.77.214423

“Synthesis and Structure of the Dimeric Copper(II) ComplexTetrakis[N-thiazol-2-yl-(4-methyl-phenyl)sulfonamidate)dicopper(II)”, Santiago Cabaleiro, Rafael Calvo, Jesús Castro, J. Arturo García Vázquez, Lia M. B. Napolitano, Otaciro R. Nascimento, Paulo Perez Lourido, Jaime Romero, Antonio Sousa, Journal of Chemical Crystallography 38, 71-75 (2008). DOI: 10.1007/s10870-007-9303-9

"A New Copper(II) di-µ2-carboxylato Bridged Dinuclear Complex: [Cu(oda)phen]2.6H2O (oda = oxydiacetate, phen = phenanthroline)", Ricardo Baggio, Rafael Calvo, Maria T. Garland, Octavio Peña, Mireille Perec, Leonardo D. Slep, Inorganic Chemistry Communications 10, 1249-1252 (2007). DOI: 10.1016/j.inoche.2007.07.028

"Synthesis, crystal structure and magnetic properties of a new dinuclear Copper(II) Amino acid complex: [Cu2(L-arg)2(µ-HPO4-O) (µ-HPO4-O,O’)( µ-OH)]-.H3O+.(H2O)6", . Ricardo C. Santana, Ivo Vencato, Jesiel F. Carvalho, Hamilton B. Napolitano, Adailton J. Bortoluzzi, Gaston E. Barberis, Raul E. Rapp, Mario C. G. Passeggi, Rafael Calvo, Polyhedron 26, 5001-5008 (2007). DOI: 10.1016/j.poly.2007.07.005

"Magnetic properties and EPR spectra of [Cu(L-arginine)2](NO3)2.3H2O", Matías F. Gerard, Carla Aiassa, Nieves M. C. Casado, Ricardo C. Santana, Mireille Perec, Raul E. Rapp, Rafael Calvo, Journal of Physics and Chemistry of Solids 68, 1533-1539 (2007). DOI: 10.1016/j.jpcs.2007.03.032

"A Seven Coordinate FeIII Compound: [Fe{O(CH2CO2)2}(H2O)2(NO3)]. Preparation, Structure and Magnetic Properties", Leonardo Slep, Rafael Calvo, Otaciro R. Nascimento, Ricardo Baggio, María T. Garland, Octavio Peña and Mireille Perec, Inorganica Chimica Acta 360, 2911-2916 (2007). DOI: 10.1016/j.ica.2007.02.031

"Growth, EPR and Optical Absorption Spectra of L-Threonine Single Crystals Doped with Cu2+ ions", R.C. Santana, R.O. Cunha, M.G. Santos, K.D. Ferreira, J.F. Carvalho, R. Calvo, Journal of Physics and Chemistry of Solids 68, 586-593 (2007). DOI: 10.1016/j.jpcs.2007.01.043

"EPR Measurements of Weak Exchange Interactions Coupling Unpaired Spins in Model Compounds", Rafael Calvo, Applied Magnetic Resonance 31, 271-299 (2007). DOI: 10.1007/BF03166261

"Protein-cofactor Interactions in Bacterial Reaction Centers from Rb. Sphaeroides R-26: II. Geometry of the Hydrogen Bonds to the Primary Quinone QA-· by 1H and 2H ENDOR Spectroscopy", M. Flores, R. Isaacson, E. Abresch, R. Calvo, W. Lubitz, G. Feher, Biophysical Journal 92, 671-682 (2007). DOI: 10.1529/biophysj.106.092460

"Protein-Cofactor Interactions in Bacterial Reaction Centers from Rb. Sphaeroides R-26: I. Identification of the ENDOR Lines Associated with the Hydrogen Bonds to the Primary Quinone QA-·", M. Flores, R. Isaacson, E. Abresch, R. Calvo, W. Lubitz, G. Feher, Biophysical Journal 90, 3356-3362 (2006). DOI: 10.1529/biophysj.105.077883

"Gadolinium(III) and Europium(III) L-glutamates: Synthesis and Characterization", Beatriz Barja, Ricardo Baggio, Rafael Calvo, María T. Garland, Mireille Perec, Alberto Rizzi, Inorganica Chimica Acta 359, 3921-3926 (2006). DOI: 10.1021/ic0510056

"Magnetic Properties of Ferromagnetic Quasi-1D Copper-Peptide Compounds: Exchange Interactions and Very Low Temperature Phase Transitions", Edson F. Chagas, Raul E. Rapp, Daniel E. Rodrigues, Nieves M. C. Casado, Rafael Calvo, Journal of Physical Chemistry B 110, 8052-8063 (2006). DOI: 

"Weak Exchange Interaction Supported by a Biologically Relevant Long Chemical Bridge in a Cu-Peptide Model Compound", Ernani D. Vieira, Nieves M. C. Casado, Gianella Facchin, Maria H. Torre, Antonio J. Costa-Filho, Rafael Calvo, Inorganic Chemistry, 45, 2942-2947 (2006). DOI: 10.1021/ic051957b

"EPR Study of Cu(II) Dopant Ions in Single Crystals of Bis(L-asparaginato)Zn(II)", R. C. Santana, M. G. Santos, R. O. Cunha, K. D. Ferreira, J. F. Carvalho, R. Calvo, Journal of Physics and Chemistry of Solids 67, 745-750 (2006). DOI: 10.1016/j.jpcs.2005.11.006

"Gadolinium and Neodymium Citrates: Evidence for weak ferromagnetic exchange between gadolinium(III) cations", R. Baggio, R. Calvo, M. T. Garland, O. Peña, M. Perec, A. Rizzi, Inorganic Chemistry 44, 8979-8987 (2005). DOI: 10.1021/ic0510056

"catena-Poly[copper(II)-µ-L-tyrosyl-L-leucinato]", R. Baggio, N. M.C. Casado, R. Calvo, R. E. Rapp, M. T. Garland, Acta Crystallographica, Crystal Structure Communications C61, m250-m252, (2005). DOI: 10.1107/S010827010500987X

"Single Crystal EPR Study of Electronic Structure and Exchange Interactions for Copper(II)(L-arginine)(SO4)(H2O)6: A Model System to Study Exchange Interactions Between Unpaired Spins in Proteins", R. C. Santana, R. O. Cunha, J. F. Carvalho, I. Vencatto, R. Calvo, Journal of Inorganic Biochemistry 99, 415-423 (2005). DOI: 10.1016/j.jinorgbio.2004.10.014

"Electron Paramagnetic Resonance Study of Weak Exchange Interactions Between Metal Ions in a Model System: Cu(II)Gly-Trp", A. J. Costa Filho, O.R. Nascimento and R. Calvo, Journal of Physical Chemistry B 108, 9549-9555 (2004). DOI: 10.1021/jp0045742

“Structure and Magnetic Properties of Layered High Spin Co(II)(L-Threonine)2(H2O)2”, A. C. Rizzi, C. D. Brondino, R. Calvo, R. Baggio, M. T Garland, R. E. Rapp, Inorganic Chemistry 42, 4409-4416 (2003). DOI: 10.1021/ic026111b

"Probing Hydrogen Bonding to Quinone Anion Radicals by 1H and 2H ENDOR Spectroscopy at 35 GHz", M. Flores, R. A. Isaacson, R. Calvo, G. Feher, W. Lubitz, Chemical Physics 294, 401-413 (2003). DOI: 10.1016/S0301-0104(03)00321-5

“Electron Spin Resonance of Cu(II) impurities in L-Arginine Phosphate Monohydrate Single Crystals”. R. C. Santana, J. F. Carvalho, S. R. Amaral, I. Vencatto, F. Pelegrini, M. C. Terrile, A. C. Hernandes, R. Calvo. Journal of Physics and Chemistry of Solids 63, 1857-1862 (2002). DOI: 10.1016/S0022-3697(02)00169-5

“Carboxylate-Bridged Copper(II)-Lanthanide(III) Complexes: [{Cu3Ln2(oda)6(H2O)6}. 12H2O]n (Ln = Dy, Ho, Er); oda = oxydiacetate)”, Alberto Rizzi, Rafael Calvo, Ricardo Baggio, M. T. Garland, Octavio Peña, Mireille Perec, Inorganic Chemistry 41, 5609-5614 (2002). DOI: 10.1021/ic025754o

"Spin-Lattice Relaxation of Coupled Metal-Radical Spin Dimers in Proteins: Aplication to Fe2+-Cofactor (QA-,QB-, f-) Dimers in Reaction Centers from Photosynthetic Bacteria", Rafael Calvo, Roger A. Isaacson, Edward C. Abresch, Melvin Y. Okamura, George Feher, Biophysical Journal 83, 2440-2456 (2002). DOI: 10.1016/S0006-3495(02)75256-9

“Structural and Single Crystal EPR Studies of the Complex Copper L-glutamine: a Weakly Exchange-Coupled System with syn-anti Carboxylate Bridges”, José M. Schveigkardt, Alberto C. Rizzi, Oscar E. Piro, Eduardo E. Castellano, Ricardo Costa de Santana, Rafael Calvo, Carlos D. Brondino. European Journal of Inorganic Chemistry, 2002, 2913-2919 (2002). DOI: 

"Synthesis, crystal Structure and Magnetic Properties of the Mixed-Ligand Complex [Gd(CF3CO2)3(phen)2(H2O)]", Alberto Rizzi, Ricardo Baggio, Rafael Calvo, María T. Garland, Octavio Peña, Mireille Perec, Inorganic Chemistry 40, 3623-3625 (2001). DOI: 10.1021/ic001243v

"Electron Spin Relaxation in Pseudo Jahn–Teller Low-Symmetry Cu(II) Complexes in Diaqua(L-aspartato)Zn(II)·H2O Crystals”, S. K. Hoffmann, W. Hilczer, J. Goslar, M. B. Massa, R. Calvo, Journal of Magnetic Resonance 153, 92-102 (2001). DOI: 10.1006/jmre.2001.2434

"EPR Study of the Electronic Properties and Weak Exchange Interactions in Bis(L-Phenylalaninamidato)Cu(II)", Nieves M. C. Casado, Roger A. Isaacson, Rafael Calvo, Journal of Inorganic Biochemistry 84, 201-206 (2001). DOI: 10.1016/S0162-0134(01)00168-4

"Structure, Disorder, and Molecular Dynamics in Zn(D,L-histidine)2: EPR of Copper Ion Dopants, X-Ray Diffraction and Calorimetric Studies”, Sergio D. Dalosto, Rafael Calvo, José L. Pizarro, Maria Isabel Arriortua, Journal of Physical Chemistry A 105, 1074-1085 (2001). DOI: 10.1021/jp0102670

“EPR Study of the Semiquinone Biradical QA-·QB-· in Photosynthetic Reaction Centers of Rb. sphaeroides at 326 GHz: Determination of the Exchange Interaction Jo”, Rafael Calvo, Roger A. Isaacson, Mark L. Paddock, Edward C. Abresch, Melvin Y. Okamura, Anna-Lisa Maniero, Louis-Claude Brunel, George Feher, Journal of Physical Chemistry B, 105, 4053-4057 (2001). DOI: 10.1021/jp0102670

“Magnetic Properties of Carboxylate-Bridged Ferromagnetic Copper(II) Chains Coupled by Cation-pi Interactions”, Antonio J. Costa-Filho, Otaciro R. Nascimento, Luis Ghivelder, Rafael Calvo, Journal of Physical Chemistry B, 105, 5039-5047 (2001). DOI: 10.1021/jp0045742

“EPR Study of the Molecular and Electronic Structure of the Semiquinone Biradical QA-·QB-· in Photosynthetic Reaction Centers from Rb. sphaeroides”, R. Calvo, E. Abresch, R. Bittl, G. Feher, W. Hofbauer, R. A. Isaacson, W. Lubitz, M. Y. Okamura, M. L. Paddock, Journal of the American Chemical Society 122, 7327-7341 (2000). DOI: 10.1021/ja000399r

"Structure and magnetic properties of binuclear Cu2(O2CCH.CHCH3)4(DMF)2: a carboxylate-bridged Cu(II) spin dimer", Roxana F. Schlam, Mireille Perec, Rafael Calvo, Luis Lezama, Maite Insausti, Teofilo Rojo, Bruce M. Foxman, Inorganica Chimica Acta 310, 81-88 (2000). DOI: 10.1016/S0020-1693(00)00288-7