Alper Uzun - Welcome - Hosgeldiniz

Iridium complexes were synthesized on MgO powder by adsorption of Ir(C₂H₄)₂(acac) [acac = acetonylacetonate]; images determined by aberration-corrected scanning transmission electron microscopy show individual Ir atoms, demonstrating that the supported complexes were site-isolated.

from APS Science 2008 (p53-54)

Ph.D. Thesis: Zeolite Y- and MgO-Supported Molecular Metal Complexes and Clusters: Synthesis, Characterization, and Catalytic Properties - Aug 2009 - Bruce C. Gates Catalysis Research Group

Master Thesis: Uzun, A. "Quantum Chemical Simulation of the Selective Catalytic Reduction Reaction of NO by NH₃ (SCR Reaction) on V₂O₅ Catalytic Surface" Middle East Technical University, Ankara, Turkey, Aug 2003.

Publications:

Uzun, A.; Gates, B. C. "Dynamic Structural Changes in a Molecular Zeolite-Supported Iridium Catalyst for Ethene Hydrogenation", Journal of the American Chemical Society, 2009, 131, 15887–15894. (Click to see it on C&E News)
Uzun, A.; Ortalan, V.; Hao, Y.; Browning , N. D.; Gates, B. C. “A Site-Isolated Mononuclear Iridium Complex Catalyst Supported on MgO: Characterization by Spectroscopy and Aberration-Corrected Scanning Transmission Electron Microscopy”, Journal of Catalysis, accepted for publication.
Uzun, A.; Ortalan, V.; Hao, Y.; Browning , N. D.; Gates, B. C. "Nanoclusters of Gold on a High-Area Support: Almost Uniform Nanoclusters Imaged by Scanning Transmission Electron Microscopy", ACS Nano, in press.
Uzun, A.; Ortalan, V.; Hao, Y.; Browning , N. D.; Gates, B. C. "Imaging gold atoms in site-isolated MgO-supported mononuclear gold complexes", Journal of Physical Chemistry C, 2009, 113, 16847–16849.
Uzun, A.^‡; Ortalan, V.^‡; Browning , N. D.; Gates, B. C. "Site-Isolated Iridium Complexes on MgO Powder: Individual Ir Atoms Imaged by Scanning Transmission Electron Microscopy", Chemical Communications 2009, 4657-4659 (with COVER)(^‡These authors contributed equally to this work).
Onal, I; Sayar, A.; Uzun, A.; Ozkar, S. “A Density Functional Study of Ni₂ and Ni₁₃Nanoclusters” Journal of Computational and Theoretical Nanoscience, 2009, 6, 867-872.
Uzun, A.; Gates, B. C. "Real-Time Characterization of Formation and Breakup of Iridium Clusters in Highly Dealuminated Zeolite Y" Angewandte Chemie International Edition 2008, 47, 9245-9248 (Designated as HOT PAPER with Inside COVER).
Uzun, A.; Bhirud, V. A.; Kletnieks, P. W.; Haw, J. F.; Gates, B. C. "Site-Isolated Iridium Diethylene Complex Supported on Highly Dealuminated Y Zeolite: Synthesis and Characterization" Journal of Physical Chemistry C 2007, 111, 15064-15073.
Bhirud, V. A.; Uzun, A.; Kletnieks, P. W.; Haw, J. F.; Olmstead, M. M.; Gates, B. C. "Synthesis and Crystal Structure of Ir(C₂H₄)₂(C₅H₇O₂)", Journal of Organometallic Chemistry 2007, 692, 10, 2107-2113.
Soyer, S.; Uzun, A.; Senkan, S.; Önal, I. "A Quantum Chemical Study of Nitric Oxide Reduction by Ammonia (SCR reaction) on V₂O₅ Catalyst Surface", Catalysis Today 2006, 118, 3-4, 268-278.

Oral Presentations:

Uzun, A.; Gates, B. C. "Dynamic Structural Changes in a Zeolite-Supported Iridium Catalyst for Ethylene Hydrogenation: Reversible Interconversion of Metal Complexes and Clusters Controlled by the Reactant Composition" 21^st North American Catalysis Society Meeting (21^st NAM), OE24, San Francisco, CA, 2009.
Ortalan, V.; Uzun, A.; Gates, B. C.; Browning, N. D. "Atomic Scale Real Time Observation of Iridium Cluster Formation on MgO Surface from Mononuclear Ir(C₂H₄)₂ Complexes by Transmission Electron Microscopy", NN4.4, Symposium NN: In-situ Studies across Spatial and Temporal Scales for Nanoscience and Technology, 2008 MRS Fall Meeting, Boston, 2008.
Uzun, A.; Liang, A.; Gates, B. C. "Zeolite-Supported Metal Complex and Cluster Catalysts: Structures and Intermediates from Transient Spectroscopy During Ethylene Hydrogenation", 14^th International Congress on Catalysis, OB35, Seoul, Korea, 2008.
Uzun, A.; Kletnieks, P. W.; Haw, J. F.; Gates, B. C. "Time-Resolved X-ray Absorption Spectra Characterizing Formation and Breakup of Zeolite-Supported Iridium Cluster Catalysts", 20^th North American Catalysis Society Meeting (20^th NAM), O-S2-17, Houston, TX, 2007.
Uzun, A.; Bhirud, V. A.; Kletnieks, P. W.; Haw, J. F.; Gates, B. C. "Dealuminated Y Zeolite-Supported Mononuclear Iridium Complexes with Reactive Ethylene Ligands: Synthesis, Characterization, and Catalysis of Ethylene Hydrogenation", The 2006 Annual AIChE Meeting, San Francisco, 175c, 2006.
Lobo, R. J.; Uzun, A.; Bare, S. R.; McCall, M. J.; Gates, B. C. "Performance Testing and Structural Characterization of Gamma-Al₂O₃-Supported Rhenium Clusters and Particles for Methylcyclohexane Conversion", The 2006 Annual AIChE Meeting, San Francisco, 308f, 2006.
Önal, I.; Uzun, A.; Soyer, S.; Senkan, S. "A Quantum Chemical Study of Nitric Oxide Reduction by Ammonia (SCR Reaction) on V₂O₅ Catalyst Surfaces", 5^th International Symposium on Group Five Compounds, Hancock, 2005.
Uzun, A.; Akbulut, B.; Önal, I.; Senkan, S. "A Computational Study of Catalytic Partial Oxidation of Methane to Formaldehyde", 2^nd Chemical Engineering Conference for Collaborative Research in Eastern Mediterranean, CC (3.8):111-112, Ankara, 2001.

Poster Presentations:

Ogino, I.; Uzun, A.; Bhirud V. A.; Kletnieks, P. W.; Craciun, R; Haw, J. F.; Dixon, D. A.; Olmstead, M. M.; Gates, B. C. "Synthesis and characterization of Zeolite-Supported Metal Complex Catalysts", International Symposium on Relations between Homogeneous and Heterogeneous Catalysis (ISHHC XIII), P-125, University of California, Berkeley, 2007.
Uzun, A.; Bhirud, V. A.; Kletnieks, P. W.; Haw, J. F.; Gates, B. C. "Dealuminated Y Zeolite-Supported Mononuclear Iridium Complexes with Reactive Ethylene Ligands: Synthesis, Characterization, and Catalysis of Ethylene Hydrogenation", UCD-METU Workshop on Research Collaborations, Davis, 2006.
Uzun, A.; Önal, I.; Senkan, S. "Quantum Chemical Simulation of Partial Oxidation of Methane to Formaldehyde Reaction on Boronoxide Surface", 2^ndChemical Engineering Conference for Collaborative Research in Eastern Mediterranean, Ankara, 2001.

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