The main focus of our research is solid-state NMR of half-integer
quadrupolar nuclei in inorganic and organometallic materials. Such quadrupolar
nuclei constitute about 73% of NMR active nuclides in the periodic table. Our
research focusses are currently in three general areas:
NMR of Quadrupolar Nuclei in Metallocenes and Related Organometallic Compounds
solid-state NMR, powder X-ray diffraction and ab initio calculations to examine the
relationships between the molecular structures of metallocenes, dynamic intramolecular
motion and anisotropic NMR interaction tensors (such as the chemical shielding and
electric field gradient tensors).
Enhancement in NMR Spectra of Unreceptive Quadrupolar Nuclei
Many half-integer quadrupolar
nuclei have low magnetogyric ratios, low natural abundance, large nuclear quadrupole
moments, or even some combination of the above, making them very "unreceptive"
to study by NMR.
We use the quadrupolar Carr-Purcell
Meiboom-Gill (QCPMG) pulse sequence to study such nuclei.
NMR Investigations of Composite Materials (Metal Oxides and Organometallics)
Solid-state NMR experiments,
coupled with powder X-ray diffraction and Raman spectroscopy are applied to study
composite materials composed of mesoporous metal oxides (tantalum, niobium oxides) as the
host material and a variety of organometallic complexes as guest materials. This
work is done in collaboration with Prof. David Antonelli at the University of Windsor.