Raphael G. Raptis


Office: FB 132
Telephone: 764-0000, ext. 1-2598
E-Mail: raphael@epscor.upr.edu


Ph.D., Inorganic Chemistry, Texas A&M University, 1988.
Postdoctoral Fellow, Texas A&M University, 1989.
Postdoctoral Fellow, Research School of Chemistry, Australian National University, 1990-1991.

Research Interests

Synthetic Inorganic Chemistry, Coordination Chemistry, Bioinorganic Chemistry, X-Ray Crystallography, Electrochemistry.

Research Focus

Synthesis of oligo- and polynuclear pyrazolato complexes by stepwise and self-assembly techniques. Designed materials, crystal engineering. Bioinorganic and biomedical aspects of polynuclear complex chemistry (metalloprotein models and MRI contrast agents). Electrochemical study of structural rearrangements in metal clusters. Metal-metal multiple bonds; electrochemical studies and electrogeneration. Structural study of topologically unusual molecules; electrochemically induced structural rearrangements.



Selected Recent Publications

  1. Ekaterina M. Zueva, W. M. C. Sameera, Dalice M. Piñero, Indranil Chakraborty, Eamonn Devlin, Peter Baran, Katarina Lebruskova, Yiannis Sanakis, John E. McGrady, Raphael G. Raptis, "Experimental and theoretical Mössbauer study of an extended family of [Fe8(µ4-O)4(µ-4-R-px)12X4] clusters", Inorg. Chem. 2011, 50, 1021-1029 (doi:10.1021/ic101691q).
  2. Yiannis Sanakis, Michael Pissas, J. Krzystek, Joshua Telser, Raphael G. Raptis, "Spin Relaxation in a Ferromagnetic Triangular Cu3 Complex", Phys. Chem. Lett. 2010, 493, 185-190 (doi:10.1016/j.cplett.2010.05.011)
  3. 2.Marlyn Rivera-Carrillo, Indranil Chakraborty, Raphael G. Raptis, "Systematic Synthesis of a Metal Organic Framework Based on Triangular Cu3(_3-OH) Secondary Building Units: From a   0-D Complex, to an 1-D Chain and a 3-D Lattice", Cryst. Growth Des. 2010, 10, 2606-2612 (doi:10.1021/cg100060p)
  4. . Guillermo Ferraudi, Dalice Piñero, Indranil Chakraborty, Raphael G. Raptis, A. Graham Lappin, Nicolas Berlin, "Mechanistic and energetic aspects of the thermal and photochemical redox chemistry of the octanuclear cubane complexes, FeIII8(µ4-O4)(µ-pyrazolate)12X4 (X = Cl or Br)", J. Phys. Chem. A 2010, 114, 5702-5709 (doi:10.1021/jp911644e).
  5. Haralampos Miras, Indranil Chakraborty, Raphael G. Raptis, "Tri-, deca- and dodecanuclear Co(III)-pyrazolate metallacycles", Chem Commun. 2010, 46, 2569-2571 (doi:10.1039/b920486e)
  6. . I. Chakraborty, P. Baran, Y. Sanakis, A. Simopoulos, E. Fachini, R. G. Raptis, “A Mixed-Valence Octanuclear Iron-Oxo Pyrazolate: Assessment of Electronic Delocalization by Structural and Spectroscopic Analysis”, Inorg. Chem. 2008, 47, 11734-11737.
  7. H. N. Miras, H. Zhao, R. Herchel, C. Rinaldi, R. G. Raptis, “Synthesis and Characterization of Linear Trinuclear Pd, Co and Pd/Co Pyrazolate Complexes”, Eur. J. Inorg. Chem. 2008, 30, 4745-4755.
  8. M. Rivera-Carrillo, I. Chakraborty, G. Mezei, R. D. Webster, R. G. Raptis, , “Tuning of the [Cu3(μ-O)]4+/5+ Redox Couple; Spectroscopic Evidence of Charge Delocalization in the Mixed-Valent [Cu3(μ-O)]5+ Species”, Inorg. Chem. 2008, 47, 7644-7650.
  9. G. Yang, R. G. Raptis, P. Šafář, “Cadmium(II) complexes of 4-(4-pyridyl)pyrazole; Conformational supramolecular isomerism in a ‘two-in-one’ crystal”, Cryst. Growth Des. 2008, 8, 981-985.
  10. P. Baran, R. Boča, I. Chakraborty, J. Giapintzakis, R. Herchel, Q. Huang, , R. G. Raptis, Y. Sanakis, A. Simopoulos, “Synthesis, Characterization and Study of Octanuclear Iron-Oxo Clusters Containing a Redox-Active Fe4O4-Cubane Core”, Inorg. Chem. 2008, 47, 645-655.
  11. D. Piñero, P. Baran, R. Boca, R. Herchel, M. Klein, R. G. Raptis, F. Renz, Y. Sanakis, “Pyrazolate-Supported Fe33-O)-Core; Structural, Spectroscopic, Electrochemical and Magnetic Study”, Inorg. Chem. 2007, 46, 10981-10989.
  12. G. Mezei, M. Rivera-Carillo, R. G. Raptis, “Trigonal prismatic CuII6-pyrazolato cages: Structural and electrochemical study, evidence of charge-delocalisation”, Dalton Trans. 2007, 37-40.
  13. G. Yang, R. G. Raptis, “Synthesis and crystal structure of tetrameric silver(I) 3,5-di-tert-butyl-pyrazole”, Inorg. Chim. Acta 2007, 360, 2503-2506.
  14. G. Mezei, R. G. Raptis, J. Telser, “Trinuclear, Antiferromagnetically Coupled CuII Complexes with an EPR Spectrum of Mononuclear CuII: Effect of Alcoholic Solvents”, Inorg. Chem. 2006, 45, 8841-8843.
  15. G. Mezei, J. E. McGrady, R. G. Raptis, “First Structural Characterization of a Delocalized, Mixed-Valent, Triangular Cu37+ Species: Chemical and Electrochemical Oxidation of a CuII3(m3-O) Pyrazolate and Electronic Structure of the Oxidation Product”, Inorg. Chem. 2005, 44, 7271-7273.
  16. G. Yang, R. G. Raptis, “A robust, porous, cationic silver(I) 3,5-diphenyl-1,2,4-triazolate framework with a new uninodal 49.66 net”, Chem. Commun. 2004, 2058-2059.
  17. G. Mezei, P. Baran, R. G. Raptis, “Anion Encapsulation by Neutral Supramolecular Assemblies of Cyclic CuII-Complexes; a Series of Five Polymerization Isomers, [cis-CuII(m-OH)(m-pz)]n, n = 6, 8, 9, 12, 14”, Angew. Chem. Int. Ed. 2004, 43, 574-577.