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H. V. Rasika Dias |
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Inorganic
and Organometallic
Chemistry
Professor B.Sc. (First Class Honors) Ph.D. University of California, Davis (1988) Postdoctoral Fellow: Visiting Research Scientist: |
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Phone: 817-272-3813 FAX: 817-272-3808 E-mail: dias@uta.edu Office: 305 CRB Personal Page |
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Honors and
Awards:
• SW Regional Award of the American Chemical
Society, 2009 Other
affiliations: Visiting Professor, Institute of Fundamental Studies, Sri Lanka Research interests: A major part of our research efforts are directed to the design and synthesis of novel ligands (in particular, highly fluorinated ligands and weakly coordinating anions) with diverse steric and electronic properties and their utility in application areas such as (i) homogeneous catalysis, (ii) luminescent materials, (iii) conducting polymers, (iv) reactive intermediates, and (v) metals in medicine and biological processes.
Recent studies led to the isolation of several interesting ligands with high fluorine content. These “Teflon coated” molecular containers allow us to study chemistry, rarely seen with any other ligand system. For example, they have allowed us to trap labile molecules and reactive intermediates in “bottle-able” form, prepare metal catalysts that are capable of activating some of the most inert bonds like C-H and C-Cl under remarkably mild conditions, isolate light emitting materials suitable for LED and sensor applications, design greener catalytic oxidation routes, and to develop powerful antimicrobial agents.
Modern synthetic and analytical techniques like Schlenk and glove box methods, IR-Raman spectroscopy, multinuclear NMR spectroscopy and X-ray crystallography, and computational methods are used routinely in our work. Most of our research projects are interdisciplinary in nature. We also collaborate closely with several research groups at UTA and around the world.
Recent Publications: “A
“Classical” Silver Carbonyl Complex [MeB(3-(Mes)Pz)3]AgCO
and the Related Silver Ethylene Adduct “Eco-Friendly synthesis of high quality polyaniline using a copper(II) scorpionate catalysts”, H. V. R. Dias, R. M. G. Rajapakse, D. M. M. Krishantha, M. Fianchini, X. Wang, R. L. Elsenbaumer, J. Mater. Chem., 2007, 17, 1762-1768. Identified as a “Hot-Paper”: http://www.rsc.org/Publishing/Journals/jm/News/HotADias.asp “Arene Sandwiched Silver(I) Pyrazolates”, H. V. R. Dias, C. S. Palehepitiya Gamage, Angew. Chem., 2007, 119, 2242-2244, Angew. Chem. Int. Ed., 2007, 46, 2192-2194. “Thermally stable gold(I) ethylene adducts: [HB(3,5-(CF3)2Pz)3]Au(CH2=CH2) and [HB(3-(CF3),5-(Ph)Pz)3]Au(CH2=CH2)”, H. V. R. Dias, J. Wu, Angew. Chem., 2007, 119, 7960-7962; Angew. Chem., Int. Ed., 2007, 46, 7814-7816. Identified as a “Hot-Paper” in Angew. Chem., Int. Ed. Highlighted in Chemical and Engineering News, September 17, 2007, "Gold scorpionates capture ethylene" in Science & Technology Concentrates, page 31. “A 'Classical' Silver Carbonyl Complex [MeB(3-(Mes)Pz)3]AgCO and the Related Silver Ethylene Adduct [MeB(3-(Mes)Pz)3]Ag(C2H4).” “Silver-Catalyzed [2,3]-Rearrangement of Halonium Ylides Derived from Allyl and Propargyl Halides and Alkyl Diazoacetates”, P. Krishnamoorthy, R. G. Browning, S. Singh, R. Sivappa, C. J. Lovely, H. V. R. Dias, Chem. Commun., 2007, 731-733. “Trinuclear Silver(I) Complexes of Fluorinated Pyrazolates”, H. V. R. Dias, C. S. Palehepitiya Gamage, J. Keltner, H. V. K. Diyabalanage, I. Omari, Y. Eyobo, N. R. Dias, N. Roehr, L. McKinney, T. Poth, Inorg. Chem, 2007, 46, 2979-2987. “Synthesis and characterization of the first gold(I)-tris(ethylene) complex: [Au(C2H4)3][SbF6]”, H. V. R. Dias, M. Fianchini, T. R. Cundari, C. F. Campana, Angew. Chem., Int. Ed., 2008, 47, 556-559. “Structurally characterized coinage
metal ethylene complexes”, H. V. R. Dias, J. Wu, Invited Microreview
for Eur. J. Inorg. Chem., 2008, 509-522, and 2008, 2113. Highlighted
in the European Journal of Inorganic
Chemistry Cover, Issue 4, 2008. “Gold(I)-Ethylene and Copper(I)-Ethylene Complexes Supported by a Polyhalogenated Triazapentadienyl Ligand”, J. A. Flores, H. V. R. Dias, Inorg. Chem., 2008, 47, 4448-4450. Other Publications of Particular Interest: "Boron-Phosphorus
Analogues of Benzene and Cyclobutadiene. Synthesis and Characterization
of the Boraphosphabenzenes (RBPR')3 (R = Mes, Ph; R' = Ph,
Mes, C6H11, t-Bu) and the
Diphosphadiboretane "Electronic Stabilization of Nucleophilic Carbenes"; A. J. Arduengo, III, H. V. R. Dias, R. L. Harlow, M. Kline, J. Am. Chem. Soc., 1992, 114, 5530-5534. "A Stable Carbene-Alane Adduct"; A. J. Arduengo, III, H. V. R. Dias, J. C. Calabrese, F. Davidson, J. Am. Chem. Soc. 1992, 114, 9724-9725; Highlighted in Chemical and Engineering News, December 14, 1992, "Stable Carbene-Alane Adduct Prepared" in Science & Technology Concentrates, page 22. "A Stable Tridentate Carbene Ligand"; H. V. R. Dias, W. Jin, Tetrahedron Lett. 1994, 35, 1365-1366. This discovery has been now recognized as a World record in chemistry. See Page 258, “World Records in Chemistry”, Editor H.-J. Quadbeck-Seeger; Wiley, 1999, ISBN 3-527-29574-7 "Activation of Alkyl Halides via a Silver-Catalyzed Carbene Insertion Process ", H. V. R. Dias, R. G. Browning, S. A. Polach, H. V. K. Diyabalanage, C. J. Lovely, J. Am. Chem. Soc., 2003, 125, 9270-9271. "Bright Phosphorescence of a Trinuclear Copper (I) Complex: Luminescence Thermochromism, Solvatochromism, and “Concentration Luminochromism”, H. V. R. Dias, H. V. K. Diyabalanage, M. A. Rawashdeh-Omary, M. A. Franzman, M. A. Omary, J. Am. Chem. Soc., 2003, 125, 12072-12073. This discovery has been recognized as an ACS “Heart-Cut” item in the November 17, 2003 issue. "Supramolecular Features of Synthetic Nanotubes”, V. G. Organo, A. V. Leontiev, V. Sgarlata, H. V. R. Dias, D. M. Rudkevich, Angew. Chem., 2005, 117, 3103-3107, Angew. Chem. Int. Ed., 2005, 44, 3043-3047. This work has been highlighted in “Chemistry World”, June, 2005. "Metal Effect on the Supramolecular Structure, Photophysics, and Acid-Base Character of Trinuclear Pyrazolato Coinage Metal Complexes”, M. A. Omary, M. A. Rawashdeh-Omary, M. A. W. Gonser, O. Elbjeirami, T. Grimes, T. R. Cundari, H. V. K. Diyabalanage, C. S. Palehepitiya Gamage, and H. V. R. Dias, Inorg. Chem., 2005, 44, 8200-8210. Highlighted in the Inorganic Chemistry Cover, Nov 14 issue, 2005. "A mild, copper catalyzed route to conducting polyaniline”, H. V. R. Dias, X. Wang, R. M. G. Rajapakse, R. L. Elsenbaumer, Chem. Commun., 2006, 976-978. Highlighted in Chemical and Engineering News, March 6, 2006, "Copper catalyst paves new way to polyaniline" in Science & Technology Concentrates, page 62.
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Department of Chemistry and Biochemistry |
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