Description of Research Program of Dr. Wacholtz
office: HS 441
Area of research: Photochemical and Photophysical
Studies of Inorganic and Organometallic Complexes.
Structure - Property Relationships in Mixed Ligand Complexes.
Techniques used: A majority of our work involves the synthesis and isolation of new luminescent compounds followed by spectroscopic characterization: FTIR, FTNMR, UVVis, Emission and Luminescence Lifetime determination. X-ray diffraction studies are performed at Tulane University in collaboration with Dr. Joel Mague.
Minimum experience: 1 semester Organic Chemistry
Preferred experience: Quantitative analysis, 2 semesters Organic Chemistry
Several of my undergraduate students have presented their investigations at National and Regional ACS meetings. I have had 6 publications in peer-reviewed journals with UW Oshkosh undergraduate student co-authors.
"Synthesis and Characterization of a Novel Thiophene Ligand
and its Incorporation in Low-Dimensional Platinum(II) Complexes"
by Autumn Krug & Dr. Wacholtz
"Investigations of Columnar Photomechanically Active
Rhodium (I) Complexes" by Alexsia Richards, Dr. Wacholtz,
Ryan Davis and James Brozik of U New Mexico
The structure-property relationships in mixed ligand d10 metals (i.e. zinc and cadmium) employing dithiol and N,N-heterocyclic ligands are continuing in my laboratories. Several unusual multinuclear compounds have recently been obtained and shown to be luminescent. Additionally, a novel luminescent trinuclear compound that exhibits multiple coordination geometries has been isolated and characterized. Further syntheses and studies of the factors that control five coordinate vs. four coordinate structures in these complexes are ongoing. Photophysical measurements have shown that in some cases multiple emissions are possible from a molecule and excited state studies of any luminescent species are always a primary goal of any aspect of this project.
Recently, my research group has started examining luminescent trigold(I) complexes. Structural information shows that luminescent properties of the pyrazolato, indazolato, and pyridazinyl trigold(I) complexes are extremely sensitive to electron-withdrawing factors (ligand basicity) as well as the degree of supramolecular organization in the crystal. An excitation-dependent emission has been observed in one unsymmetric pyrazolato trigold(I) complex.