Meyer, Gerald - The University of North Carolina at Chapel Hill

个人简介

Ph. D. (1989) University of Wisconsin at Madison, Department of Chemistry with Professor Arthur B. Ellis B.S. (1985) State University of New York at Albany, Departments of Chemistry and Mathematics Research Experience: Professor: University of North Carolina at Chapel Hill, Department of Chemistry, (1/14 – present) Bernard N. Baker Professor of Chemistry Johns Hopkins University (7/09 –12/13) Chairman of Chemistry Johns Hopkins University (7/11 – 6/13) Johns Hopkins University, Department of Chemistry (7/00 – 12/13) Johns Hopkins University, Department of Materials Science & Engineering (7/00 – 12/13) Associate Professor: Johns Hopkins University, Department of Chemistry (7/97 – 6/00) Assistant Professor: Johns Hopkins University, Department of Chemistry (7/91 - 6/97) Postdoctoral Associate: University of North Carolina at Chapel Hill with Thomas J. Meyer (10/89 - 6/91) Research Assistant: University of Wisconsin-Madison (1/87 - 10/89) State University of New York at Albany (2/84 - 8/85)

研究领域

Dye-sensitized Semiconducting and Conducting Electrodes for Solar Energy Conversion Dye-sensitized semiconductors based on mesoporous thin films of anatase TiO2 nanocrystallites provide a means for conversion of sunlight to electrical power (with efficiencies > 13%) and for water splitting to generate hydrogen gas (with efficiencies approaching 1 %). These materials also offer unprecedented opportunities to understand, and ultimately control, light driven reactivity. Our group has paid particular attention to controlling the unwanted charge recombination of electrons injected into TiO2 with the oxidized dye and/or redox mediator. A recently discovered electro-absorption signature allows quantification of the electric fields present at the interface. The use of conducting oxides has recently provided fundamental insights into the reorganization energies associated with electron and proton coupled electron transfer. Halide and Water Oxidation with Designed Supramolecular Complexes Our group is designing supramolecular complexes based on transition metals that can drive water and/or halide oxidation when illuminated with visible light. We pay particular attention to the excited states that initiate the reaction chemistry and look for opportunities to advance fundamental science with an eye towards practical applications. Supramolecular assemblies exploit non-covalent interactions through hydrogen bonding and electrostatic ion-pairing. Natural population analysis from density functional theory allows the site(s) of ion association to be predicted. Halide oxidation studies have focused mainly on iodide and, to a lesser extent, bromide. Chloride is often used as a non-redox active anion that can be recognized and, under specific conditions, photo-released. In some cases, this photochemistry is extended from fluid solution to semiconductor-electrolyte interfaces where desired behaviors can be exploited in photoelectrochemical cells. Intra- and Intermolecular Electron Transfer at Oxide Interfaces We are interested in electron transfer reactions that occur with strong (adiabatic) and weak (non-adiabatic) electronic coupling. We have recently shown that strong electronic coupling results in more rapid electron transfer, but at the expense of some free energy losses. A particularly interesting non-adiabatic electron transfer reaction is lateral self-exchange intermolecular ‘hole-hopping’ that occurs across solid surfaces. This reaction allows translation of charge without a loss of free energy. While a great deal is known about light driven electron transfer reactions when the electronic coupling is fixed, much less is known about how the coupling influences reactivity when the free energy is fixed. We continue to exploit this fact for advancement of fundamental science with the very real possibility for practical applications in solar energy conversion.

近期论文

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Chloride Oxidation by One- or Two-Photon Excitation of N‑Phenylphenothiazine Pengju. Li, Alexander M. Deetz, Jiaming Hu, Gerald J. Meyer, and Ke Hu. J. Am. Chem. Soc. 2022. Reorganization Energies for Interfacial Electron Transfer across Phenylene Ethynylene Rigid-Rod Bridges. Marzieh Heidari, Quentin Loague, Rachel E. Bangle, Elena Galoppini, and Gerald J. Meyer. ACS Appl. Mater. Interfaces 2022, 14, 30, 35205–35214. Resolving Halide Ion Stabilization through Kinetically Competitive Electron Transfers. Alexander M. Deetz and Gerald J. Meyer. JACS Au 2022, 2, 4, 985–995. Visible Light Generation of a Microsecond Long-Lived Potent Reducing Agent. Zijian Zhao, Fushuang Niu, Pengju Li, Hanqi Wang, Zhenghao Zhang, Gerald J. Meyer, and Ke Hu. J. Am. Chem. Soc. 2022, 144, 16, 7043–7047. Free Energy Dependencies for Interfacial Electron Transfer from Tin-Doped Indium Oxide (ITO) to Molecular Photoredox Catalysts. Rachel E. Bangle, Jenny Schneider, Quentin Loague, Matthew Kessinger, Andressa V. Müller and Gerald J. Meyer. 2022 ECS J. Solid State Sci. Technol.11 025003 Photocatalyst assemblies with two halide ions. Michael D. Turlington, Alexander M. Deetz, Dylan Vitt, Gerald J. Meyer. Journal of Photochemistry and Photobiology, Volume 9, 2022, 100090. On the Determination of Halogen Atom Reduction Potentials with Photoredox Catalysts. Alexander M. Deetz, Ludovic Troian-Gautier, Sara A. M. Wehlin, Eric J. Piechota, and Gerald J. Meyer*. J. Phys. Chem. A 2021, 125, 42, 9355–9367. Dye-sensitized solar cells strike back. Ana Bele´n Mun˜oz-Garcı´a, Iacopo Benesperi, Gerrit Boschloo Javier J. Concepcion, Jared H. Delcamp, Elizabeth A. Gibson, Gerald J. Meyer, Michele Pavone, Henrik Pettersson, Anders Hagfeldt and Marina Freitag. Chem. Soc. Rev., 2021, 50, 12450-12550. Accessing Photoredox Transformations with an Iron(III) Photosensitizer and Green Light. Akin Aydogan, Rachel E. Bangle, Alejandro Cadranel, Michael D. Turlington, Daniel T. Conroy, Dual-Sensitizer Photoanode for Bromide Oxidation. Michael D. Turlington, Matthew D. Brady, and Gerald J. Meyer. ACS Applied Energy Materials 2021 4 (1), 745-754. Tunneling and Thermally Activated Electron Transfer in Dye-Sensitized SnO2|TiO2 Core|Shell Nanostructures. Rachel E. Bangle, Michael J. Mortelliti, Ludovic Troian-Gautier, Jillian L. Dempsey, and Gerald J. Meyer. The Journal of Physical Chemistry C 2020 124 (45), 25148-25159. Solvent influence on non-adiabatic interfacial electron transfer at conductive oxide electrolyte interfaces. Aramburu-Trošelj, B. M.; Bangle, R. E.; Meyer, G. J. Solvent Influence on Non-Adiabatic Interfacial Electron Transfer at Conductive Oxide Electrolyte Interfaces. J. Chem. Phys. 2020, 153 (13), 134702. Photophysical characterization of new osmium (II) photocatalysts for hydrohalic acid splitting. Wehlin, S. A. M.; Troian-Gautier, L.; Maurer, A. B.; Brennaman, M. K.; Meyer, G. J. Photophysical Characterization of New Osmium (II) Photocatalysts for Hydrohalic Acid Splitting. J. Chem. Phys. 2020, 153 (5), 54307. Perspectives in Dye Sensitization of Nanocrystalline Mesoporous Thin Films. Hu, K.; Sampaio, R.N.; Schneider, J.; Troian-Gautier, L.; Meyer, G.J. J. Am. Chem. Soc. 2020, 142, 16099-16116. Kinetic Evidence That the Solvent Barrier for Electron Transfer Is Absent in the Electric Double Layer. Rachel E. Bangle, Jenny Schneider, Daniel T. Conroy, Bruno M. Aramburu-Trošelj, and Gerald J. Meyer. Journal of the American Chemical Society 2020 142 (35), 14940-14946 Ultrafast Relaxations in Ruthenium Polypyridyl Chromophores Determined by Stochastic Kinetics Simulations. Cheshire, T.P.; Brenneman, M.K.P.; Giokas, P.G.; Zigler, D.F.; Moran, A.M.; Papanikolas, J.M.; Meyer, G.J.; Meyer, T.J.; Houle, F.A. J. Phys. Chem. B 2020, 124, 5971-5985. Efficiency Considerations for SnO2 Based Dye-Sensitized Solar Cells. DiMarco, B. N.; Sampaio, R. N.; James, E. M.; Barr, T. J.; Bennett, M.; Meyer, G. J. ACS Appl. Mater. Interfaces. 2020, 12 (21), 23923-23930. Stark Spectroscopic Evidence that a Spin Change Accompanies Light Absorption in Transition Metal Polypyridyl Complexes. Maurer, A. B.; Meyer, G. J. J. Am. Chem. Soc. 2020, 142 (15), 6847-6851. Improved Visible Light Absorption of Potent Iridium(III) Photooxidants for Excited-State Electron Transfer Chemistry. Bevernaegie, R.; Wehlin, S. A. M.; Piechota, E. J.; Abraham, M.; Philouze, C.; Troian-Gautier, L. J. Am. Chem. Soc. 2020, 142 (6), 2732-2737. Electron Transfer Reorganization Energies in the Electrode–Electrolyte Double Layer. Bangle, R. E.; Schneider, J.; Piechota, E. J.; Troian-Gautier, L.; Meyer, G. J. J. Am. Chem. Soc. 2020, 142 (2), 674-679.