MARY T. BERRY 

 
Professor 
Physical Chemistry
University of South Dakota
  
B.S., 1980, College of Charleston 
Ph.D., 1987, University of Virginia
Postdoctoral Fellow, 1987, University of Virginia
Postdoctoral Fellow, 1987-1991 
University of Pennsylvania 

The research in our group is focused on the decay dynamics of excited states of the lanthanide ions and how these decay dynamics are affected by properties of the ligand. Important non-radiative mechanisms of decay include electronic-to-vibrational (ligand or matrix) energy transfer; electronic-to-electronic (ligand or other metal site) energy transfer; and ligand-to-metal charge transfer.

We are presently engaged in  the development of a pump-probe resonance enhanced multiphoton ionization method for studying decay dynamics of lanthanide complexes in a molecular beam. Cavity ring down laser absorption spectroscopy of tris(2,2,6,6-tetramethyl-3,5-heptanedionato)erbium(III) and photoionization mass spectrometry of the europium and dysprosium analogs suggest that spectroscopic studies of lanthanide complexes in molecular beams will be feasible.

Recent Publications

"Gas-Phase Photoionization of  Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)europium(III)," B.N. Nelson, A.G. Caster, and M.T. Berry, in press at Chem. Phys. Lett. 2004

"Spectroscopic Evidence for Equilibrium between Eight- and Nine-Coordinate Eu3+(aq) Species in 0.1 M EuCl3(aq),"  L. Tilkens, K. Randall, J. Sun, M.T. Berry, P.S. May, and T. Yamase,  J. Phys. Chem. A 2004, 108, 6624.

"Ligand-to-Metal Charge Transfer Quenching of the Eu3+(5D1) State in Europium-Doped Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)gadolinium(III)," Y. An, G. E. Schramm, and M.T. Berry, J. Lumin, 2002, 97 ,7.

"Aqueous Solutions of Europium(III) Dipicolinate Complexes: Estimates of Water Coordination Based on Molecular Dynamics Simulations and Excited State Decay Rate Constants," Y. An, M.T. Berry, and F.C.J.M. van Veggel, J. Phys. Chem. A  2000, 104, 11243.

"Ab Initio Potential Energy Surface for the He(1S)+NO(X2P) Interaction and Rovibrational States," J. Klos, G. Chalasinski, M.T. Berry, R. Bukowski, S.M. Cybulski, J. Chem. Phys. 2000, 112, 2195.

 "Ab Initio Potential Energy Surface for the Ar(1S) + OH(X2P)Interaction and Bound Rovibrational States," J. Klos, G. Chalasinski, M.T. Berry, R. Burcl, M.M. Szeczesniak, and S.W. Cybulski, J. Chem. Phys. 2000, 112, 4952.

"Effect of Ligand Deuteration on the Decay of Eu(III) in Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)europium(III)," Todd Schwendemann, P. Stanley May, Mary T. Berry, Yuqing Hou, Cal Y. Meyers, J. Phys. Chem. A.1998, 102, 8690.

"Calculated and observed Tb3+(5D4)-Eu3+ electronic energy transfer rates in Na3[Tb0.01Eu0.99(oxydiacetate)3].2NaClO4.6H2O", M.T.Berry, P. Stanley May, Q. Hu, J. Lumin. 1997 ,71, 269.

"Temperature dependence of the Eu3+5D0 lifetime in europium tris(2,2,6,6-tetramethyl-3,5-heptanedionato)", M.T.Berry, P. Stanley May, Hong Xu, J. Phys. Chem. 1996, 100, 9216.


Send e-mail to:mberry@usd.edu

USD Home PageUSD Chemistry Department