Joseph C. Deaton, Ph.D.
I came to BGSU for an opportunity to do university research once again after a career in industry. I worked at Eastman Kodak Company most recently on OLED materials and devices and before that on photographic materials. I obtained over 40 US patents, about evenly divided between the two fields. Most importantly, three of those inventions involved new sensitizers that were adopted for worldwide production of photographic films and papers. I was part of the small research team that first reduced to practice an antenna sensitization of silver halides based on Foërster energy transfer among multiple layers of organic dyes, which ultimately lead to an Oscar for scientific and technical merit at the Academy Awards for the motion picture film product that utilized that technology. My best scientific contributions to the OLED field included showing that the high quantum yield emission of a Cu complex from Jonas Peters’ lab at Caltech was delayed fluorescence, not phosphorescence, but that it could efficiently harvest triplet excitons without having to rely on complexes of rare metals like Ir or Pt. Another interesting scientific contribution was the design of device structures in which singlet and triplet excitons were partitioned into different layers of the device by triplet exciton migration, thereby allowing efficient utilization of both singlet and triplet excitons with a combination of fluorescent and phosphorescent emitters.
For my graduate work with Ed Solomon at Stanford, I did original magneto-optical experiments on oriented single crystals of iron(III) complexes that were relevant as models for metalloenzymes. These experiments gave definitive experimental assignments of the ligand field transitions and lead to a substantial revision to the theory of the origin of the ground state zero-field splitting for the hi-spin d5 configuration. I also collaborated with a scientist at GTE and with nitrogen fixation scientists at the Kettering Institute on a rare formate dehydrogenase metalloenzyme that included tungsten as well as iron-sulfur clusters. I did undergraduate research with Dick Walton at Purdue on molybdenum complexes, and a summer project with Marcetta Darensbourg when she was at Tulane on the synthesis of the elusive HCr(CO)5- by oxidative addition of a proton to the highly reduced species Cr(CO)52-.
Here at BGSU I am working in the field of metal complexes with long-lived excited states. I am interested in their photophysical properties and applications. As an initial project, I am investigating novel tridentate ligands forming expanded metallocycles in order to increase the ligand field strength and thereby reduce non-radiative decay via d-d states that may be close in energy to the lowest MLCT states. I am surveying a variety of d6, d8, and even d10 ions with a new tri-imine ligand and, in some cases, a cyclometallating analogue.
Publications
(1)“Bi-directional ‘ping-pong’ energy transfer and 3000-fold lifetime enhancement in a Re(I) charge transfer complex”, Yarnell, J. A.; Deaton, J. C.; McCusker, C. E.; Castellano, F. N. Inorg. Chem. 2011, in press.
(2)“E-type delayed fluorescence of a phosphine-supported Cu2(μ-NAr2)2 diamond core: Harvesting singlet and triplet excitons in OLEDs”, Deaton, J. C.; Switalski, S. C.: Kondakov, D. Y.; Young, R. H.; Pawlik, T. D.; Giesen, D. J.; Harkins, S. B.; Miller, A. J. M.; Mickenberg, S. F.; Peters, J. C. J. Am. Chem. Soc. 2010, 132, 9499-9508.
(3)“Photophysical properties of the series fac- and mer-(1-phenylisoquinolinato-N^C2′)x(2-phenylpyridinato-N^C2′)3-xIridium(III) (x = 1 to 3)”, Deaton, J. C.; Young, R. H.; Lenhard, J. R.; Rajeswaran, M.; Huo, S.; Inorg. Chem. 2010, 49, 9151-9161.
(4) “Highly Luminescent Tetradentate Bis-Cyclometalated Platinum Complexes: Design, Synthesis, Structure, Photophysics, and Electroluminescence Application”, Vezzu, D. A. K.; Deaton, J. C.; Jones, J. S.; Bartolotti, L.; Harris, C. F.; Marchetti, A. P.; Marina Kondakova, M.; Robert D. Pike, R. D.; Huo, S.; Inorg. Chem. 2010, 49, 5107-5119.
(5)“Highly efficient fluorescent-phosphorescent triplet-harvesting hybrid organic light-emitting diodes”, Kondakova, M. E.; Deaton, J. C.; Pawlik, T. D.; Giesen, D. J.; Kondakov, D. Y.; Young, R. H.; Royster, T. L.; Comfort, D. L.; Shore, J. D. J. Appl. Phys. 2010, 107, 014515/1-014515/13.
(6)“Acridinone/Amine(carbazole)-Based Bipolar Molecules: Efficient Hosts for Fluorescent and Phosphorescent Emitters”, Vezzu, D. A. K.; Deaton, J. C.; Shayeghi, M.; Li, Y.; Huo, S. Org. Lett. 2009, 11, 4310-4313.
(7)“OLEDs containing an emissive dinuclear copper(I) dopant”, Deaton, J. C.; Kondakov, D. Y.; Young, R. H.; Pawlik, T. D.; Peters, J. C.; Mickenberg, S. F.; Eisenberg, R. S. Digest of Technical Papers - Society for Information Display International Symposium 2009, 40(Bk 2), 691-694.
(8)“The blue aluminum and gallium chelates for OLEDs”, Deaton, J. C.; Place, D. W.; Brown, C. T.; Rajeswaran, M.; Kondakova, M. E. Inorg. Chim. Acta 2008, 361, 1020–1035.
(9)“High-efficiency, low-voltage phosphorescent organic light-emitting diode devices with mixed host”, Kondakova, M. E.; Pawlik, T. D.; Young, R. H.; Giesen, D. J.; Kondakov, D. Y.; Brown, C. T.; Deaton, J. C.; Lenhard, J. R.; Klubek, K. P. J. Appl. Phys. 2008, 104, 094501/1-094501/17.
(10)“Triplet exciton diffusion in hybrid fluorescent/phosphorescent OLEDs”, Deaton, J. C.; Kondakova, M. E.; Kondakov, D. Y.; Pawlik, T. D.; Giesen, D. J. Digest of Technical Papers - Society for Information Display International Symposium 2007, 38(Bk. 1), 849-851.
(11)“(2,6-Diphenylphenolato-κO)bis(2-methylquinolin-8-olato-κ2N,O)gallium(III)”, Rajeswaran, M.; Place, D. W.; Deaton, J. C.; Brown, C. T.; Lenhart, W. C. Acta Cryst. 2007, E63, m550-m552.
(12) “Bis(2-methylquinolin-8-olato-2N,O)(6-phenyl-2-naphtholato-O)aluminum(III)”, M. Rajeswaran, D.W. Place, V.W. Bakos, J.C. Deaton, C.T. Brown, W.C. Lenhart, Acta Cryst, (2007), E63, m54-m56.
(13)"Vapor pressures of homo- and hetero-leptic orthometalated complexes of Iridium", Deaton, J. C.; Huo, S.; Lussier, B. B.; Brown, C. T.; Garnett, J. C.; Blondell, D. B.; Landry, M. R. Digest of Technical Papers - Society for Information Display International Symposium 2006, 37(Bk. 1), 939-941.
(14)"Narrow-line and Broadband Spectra of Iridium(III) Complexes in a Shpol'skii Matrix and an Amorphous Host”, Marchetti, A. P.; Deaton, J. C.; Young, R. H. J. Phys. Chem. A 2006, 110, 9828–9838.
(15)"Highly Efficient, Selective, and General method for the preparation of Meridional Homo- and Hetero-Leptic Tris-cyclometalated Iridium Complexes", Huo, S.; Deaton, J.C.; Rajeswaran, M.; Lenhart, W. C. Inorg. Chem. 2006, 45, 3155-3157.
(16) “Bis(2-methylquinolin-8-olato)(2,6-diphenylphenolato)aluminum(III)”, M. Rajeswaran, D.W. Place, M. Sathiosatham, J.C. Deaton, C.T. Brown, W.C. Lenhart, Acta Cryst., 2006, E62, m2216-m2217.
(17)Ming, Q.-W.; Lee, Y.-A.; Crespo, O.; Deaton, J.; Tang, C.; Gysling, H.J.; Gimeno, M.C.; Larraz, C.; Villacampa, M.D., Laguna, A.; Eisenberg, R., “Intensely Luminescent Gold(I)-Silver(I) Cluster Complexes with Tunable Structural Features,” J. Am. Chem. Soc., vol 126, 9488-9499 (2004).
(18)Parton, R.L.; Penner, T.L.; Harrison, W.J.; Deaton, J.C., and Muenter, A.A., “Antenna dye Sensitization: Principles and Fluorescence Studies,” AgX 2004: International Symposium on Silver Halide Technology, Proceedings of IS&T and SPSTJ, 2004, 161-164.
(19)“Gold(I) Coordination Compounds with Mesoionic Thiolate Ligands and the Crystal and Molecular Structure of Bis(1,4,5-Trimethyl-1,2,4-Triazolium-3-Thiolate)Gold(I) Tetrafluoroborate.” J.C. Deaton and H.R. Luss, J. Chem. Soc., Dalton Trans., 1999, 3163-3167.
(20)“Single-Crystal Spectral Studies of Fe(SR)4- (R= 2,3,5,6-Me4C6H]: The Electronic Structure of the Ferric Thiolate Active Site.” M.S. Gebhard, J.C. Deaton, S.A. Koch, M. Millar, and E.I. Solomon, J. Am. Chem. Soc., 1990, 112, 2217-2231.
(21)“Transverse and Longitudinal Zeeman Effect on [PPh4][FeCl4]: Assignment of the Ligand Field Transitions and the Origin of the 6A1 Ground State Zero-Field Splitting.” J.C. Deaton, M.S. Gebhard, and E.I. Solomon, Inorg. Chem., 1989, 28, 877-889.
(22)“Ligand Field Transitions and the Origin of Zero-Field Splitting in [PPh4][FeCl4] and [NEt4][Fe(SR)4] (R = 2,3,4,5-Me4C6H): A Model for the High-Spin Fe(III) Site in Rubredoxin.” J.C. Deaton, M.S. Gebhard, S.A. Koch, M. Millar, and E.I. Solomon, J. Am. Chem. Soc., 1988, 110, 6241-6243.
(23)“Electron Paramagnetic Resonance Studies of the Tungsten-Containing Formate Dehydrogenase from Clostridium Thermoaceticum.” J.C. Deaton, E.I. Solomon, G.D. Watt, P.J. Wetherbee, and C.N. Durfor, Biochem. Biophys. Res. Comm., 1987, 149, 424-430.
(24)“Activation of Nitrate Reductase in Neurospora Crassa nit-1 Mutants with the Tungsten-Containing Formate Dehydrogenase from Clostridium Thermoaceticum.” J.C. Deaton, E.I. Solomon, C.N. Durfor, P.J. Wetherbee, B.K. Burgess, and D.B. Jacobs, Biochem. Biophys. Res. Comm., 1984, 121, 1042-1067.
(25)“Structural Characterizations of Salts of HCr(CO)5- and (-H)2BH2Cr(CO)4- and Studies of Their Interactions.” M.Y. Darensbourg, R. Bau, M.W. Marks, R.R. Burch, J.C. Deaton, and S. Slater, J. Am. Chem. Soc., 1982, 104, 6961-6969.
(26)“The HCr(CO)5- Anion.” M.Y. Darensbourg and J.C. Deaton, Inorganic Chemistry, 1981, 20, 1644-1646.
(27)“Mixed Carbonyl-Alkyl Isocyanide Complexes of Molybdenum.” J.C. Deaton and R.A. Walton, J. Organometallic Chem., 1981, 219, 187-196.