Inorganic Faculty with Research Interests

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Presentation transcript:

Inorganic Faculty with Research Interests Presentation to 2/c Chemistry Majors January 30, 2017

Assoc. Prof. Wayne Pearson My research interests lie in the development of new protocols to improve accuracy in XRF and SCXRD analyses. Project 1: Development of a System of Scaling Factors to Improve Quantitative Analysis in XRF studies Project 2: Application of Radial Form Factors to Improve Refinements of X-ray Crystal Structures.

biochem concentration! Assoc. Prof. Amy MacArthur Research interests: development of inexpensive catalysts (Co, Cu, and Ni) to replace traditional, expensive Pd, Pt, Rh, and Ir catalysts development of catalytic reactions with two catalysts operating simultaneously in solution (tandem catalysis) Qualifies for biochem concentration! Hydrodehalogenation of ArCl Cyanation of ArCl Cannon, K. A.; Geuther, M. E.; Kelly, C. K.; Lin, S.; MacArthur, A. H. R. Organometallics 2011, 30 (15), 4067-4073 Coughlin, M. M.; Kelly, C. K.; Lin, S.; MacArthur, A. H. R. Organometallics 2013, 32 (12), 3537-3543 .

Assoc. Prof. Joseph F. Lomax Collaboration with the National Gallery of Art and Dr. Suzanne Q. Lomax Investigating historical and novel modern organic pigments Synthesis Analytical IR and Raman NMR MALDI Research project or Capstone Collaboration with Prof. Peter Brereton, Physics Department Synthesis of ‘monolayer’ transition metal dichalcogenides Similar to graphene, monolayer graphite Potential optical computer components Interactions with organic bases Occurs in layered transition metal dichalcogenides May give insight into the intercalation reaction

Assoc. Prof. William Heuer Overview: Synthetic Inorganic chemistry. Preparation & study of metal complexes with novel photophysical and redox properties. Tools: NMR, IR, UV-Vis, CV, Luminescence, MALDI-MS, XRD (with Prof. Pearson). DFT calculations? (2) Preparation, ligand exchange reactions & applications of semiconductor quantum dots (collaboration with groups at NRL and NSWC Indian Head.

Ru-Ni complex – surprising photochemical reaction Photochemical reaction observed for complex with ester-substituted bpy ligands on Ru but not for bpy analogue: Sarah Duffy USNA ’11 UV-Vis spectrum of the bimetallic complex is not simply the sum of the parts: Given that the spectra of the two complexes are so similar, why do they react so differently? Another approach: Possible route to more robust bimetallic complexes? Prepare analogues with other metals (e.g. Cu or Pt) at the sulfur site. Electronic structure? Doyoung Lee ’14 Possible mechanism involves ET from ligand bridge to the diester-bpy ligands (?)

Unsymmetrical, cationic bis-chelate Pt(II) complexes Structure: assignment of 1H peaks using 2-D NMR (COSY, HMQC) and chloro-substitution: Delano Martins ’14 Nate McLauchlan ‘16 UV-Vis and Emission: Electronic Structure: Aggregation: conc.-dependent chemical shifts in 1H NMR spectrum: X-ray crystallography: Crystal growth & X-ray Aggregation studies Investigate interaction with DNA?

Semiconductor Nanocrystals (“Quantum Dots”) Synthesis and ligand-exchange reactions of soluble colloidal semiconductor QD’s and development of solution-based methods for fabrication of superlattice films, LED’s and thin-film solar cells. Nanocrystal superlattice films: Credit: Kovalenko research group Applications: Solar cell: Light-emitting diode (LED): Credit: Fafarman research group Credit: Shirasaki, et. al. Nature Photonics 7, 13–23 (2013)