Piotrowiak Group

PIOTR PIOTROWIAK

                                Professor, Physical Chemistr
                        Ph.D. 1988, University of Chicago
                        Postdoctoral Fellow, Argonne National Laboratory

tel. 973-353-5318
e-mail: piotr@newark.rutgers.edu

Research Interests

Our research concentrates on experimental studies of photoinduced charge and electronic excitation transfer processes, their relevance to solar energy conversion and to the design of molecular electronic devices. We use a mixture of time-resolved spectroscopy, synthesis and computation to study:

· electron and excitation transfer in host-guest supramolecular assemblies (hemicarceplexes)

· the interplay between intramolecular electron transfer and ionic relaxation in non-aqueous solutions of electrolytes

· the role of molecular orbital symmetry symmetry in determining the donor-acceptor energy transfer in spirobifluorenes

· ultrafast charge injection at molecule-nanoparticle interfaces

· photoisomerization dynamics of olefins with rigid chromophores

People

Piotr Piotrowiak Artem Khvorostov Lars Gundlach

Chandrika Illandarideva Misha Myahkostupov Katarzyna Paruch

Former Group Members

Massimiliano Lamberto Cynthia Pagba Anastasia Senenko

Recent Publications

Inhomogeneity of Electron Injection Rates in Dye-Sensitized TiO₂: Comparison of the Mesoporous Film and Single Nanoparticle Behavior, Bell, T. D. M.; Pagba, C.; Myahkostupov, M.; Hofkens, J.; Piotrowiak, P. J. Phys. Chem. B. 2006,110, 25314-25321.

Ultrafast Spectroscopic Study of the Photochemistry and Photophysics of Arylhalodiazirines: Direct Observation of Carbene and Zwitterion Formation, J. Wang, G. Burdzinski, J. Kubicki, M.S. Platz, R.A. Moss, X. Fu, P. Piotrowiak, M. Myahkostupov, J. Am. Chem. Soc. 2006, 128, 16446-16447.

Fragmentation of 2,2,2-Triphenylethoxychlorocarbene: Evidence for Ultrafast Fragmentation-Rearrangement in Excited Diazirines Fu, X.; Moss, R. A.; Piotrowiak, P.; Myahkostupov, M.; Gould, I. R. Org. Lett. 2006; 8; 4807-4809.

Hybrid Photoactive Assemblies: Electron Injection from Host-Guest Complexes into Semiconductor Nanoparticles, C. Pagba, G. Zordan, E. Galoppini, E.L. Piatnitski, S. Hore, K. Deshayes, P. Piotrowiak, J. Am. Chem. Soc. 2004, 126, 9888.

Preparation of an Enantiomerically Pure, Highly Porous Metalloorganic Crystal Employing Achiral Ligands, R. Kobetic, E. Stevens, P. Piotrowiak, Inorg. Chim. Acta, 2004, 357, 4610.

Luminescent Organoboron Quinolate Polymers, Y. Qin, C. Pagba, P. Piotrowiak, F. Jakle, J. Am. Chem. Soc. 2004, 126, 7015-7018.

Electron and Excitation Transfer in Hetero-Supramolecular Assemblies and at Molecule-Nanoparticle Interfaces, P. Piotrowiak, K. Deshayes, Z.S. Romanova, C. Pagba, S. Hore, G. Zordan, I. Place, A. Farrán, Pure and Appl. Chem., 2003, 75, 1061.

Sub-Picosecond Photoinduced Charge Injection from “Molecular Tripods” into Mesoporous TiO₂ Over the Distance of 24 Angstroms, P. Piotrowiak, E. Galoppini, Q. Wei, G. J. Meyer, P. Wiewiór, J. Am. Chem. Soc. 2003, 125, 5278.

New Rigid-Rod Linkers for Coupling Molecules to Metal Oxide Nanoparticles, E. Galoppini, D. Wang, W. Guo, P. Piotrowiak, P.G. Hoertz, R.A. Carlisle, G. J. Meyer, Nanolett. 2003, 3, 325.

Ion-Pairing Effects in Intramolecular Electron Transfer, E. V. Vakarin, M.F. Holovko, P. Piotrowiak, Chem. Phys. Lett. 2002, 363, 7.

Symmetry-Forbidden vs Symmetry-Allowed Electron and Hole Transfer in Medium Sized Intramolecular Organic Donor-Acceptor Radical Ions, G.A. Jones, M.N. Paddon-Row, B.K. Carpenter, P. Piotrowiak, J. Phys. Chem. A 2002, 106, 5011.

Relationship Between Electron and Electronic Excitation Transfer, P. Piotrowiak, Vol. 1, Chapt. 6 in Electron Transfer in Chemistry, V. Balzani Editor-in-Chief, Wiley-VCH, Weinheim, 2001.

Triplet Excitation Transfer Through the Walls of Hemicarcerands: Dependence of the Electronic Coupling on the Size of the Molecular Cage, Z. S. Romanova, K. Deshayes, P. Piotrowiak, J. Am. Chem. Soc. 2001, 123, 11029.

Remote Intermolecular “Heavy-Atom Effect”: Spin-Orbit Coupling Across the Wall of a Hemicarcerand, Z. S. Romanova, K. Deshayes, P. Piotrowiak, J. Am. Chem. Soc. 2001, 123, 2444.

Photoinduced Electron Transfer in Molecular Systems: Recent Developments, P. Piotrowiak, Chem. Soc. Rev. 1999, 28, 143.

Energy Transfer in Bichromophoric Molecules: The Effect of Symmetry and Donor/Acceptor Energy Gap, W. T. Yip, D. H. Levy, R. Kobetic, P. Piotrowiak, J. Phys. Chem. A, 1999, 103, 10.

Triplet Energy Transfer through the Walls of Hemicarcerands: Temperature Dependence and the Role of Internal Reorganization Energy, Place, I., Farran, A., Deshayes, K.; Piotrowiak, P. J. Amer. Chem. Soc. 1998, 120, 12626.