N-Heterocyclic Carbene & Main Group Chemistry
To investigate the new reactivity of N-heterocyclic carbenes (NHCs) with various molecules
N-heterocyclic carbenes, which are emerging as metal-mimicking materials to activate or to stabilize small molecules, have been explored to aim at capturing and releasing biologically important molecules such as nitric oxide and carbon monoxide. With the unique property, NHCs have been successfully demonstrated to stabilize nitric oxide radicals and to control the fixation and release of nitric oxide. Moreover, NHCs have been explored for various catalysis as either supporting ligands or organic catalysts. In order to maximize the reactivity of NHCs, electronically and sterically optimized NHCs will be synthesized for the potential applications to catalysis for challenging reactions and to emergent materials incorporated with multifunctional modular porous materials.
Metal Organic Materials
To achieve highly selective organic transformations inside metal organic materials (MOMs)
Metalorganic frameworks (MOFs) will be investigated as tools to enforce unprecedented selectivity in reactions such as C–H bond oxidation of hydrocarbons and direct antiMarkovnikov addition of water to alkenes. MOFs with embedded organometallic catalysts will be synthesized, and the effects of modulating both the MOF and catalyst components on the selectivity of organic reactions occurring in such materials will be explored. The constraints imposed by both the catalyst and MOF architecture on the orientation of organic molecules in bondforming and bondcleaving transition states can lead to unprecedented selectivity in the catalysis of reactions involving organic molecules.
The project will solve longstanding unsolved problems in selective catalysis such as selective CH oxidation of hydrocarbons and antiMarkovnikov addition of OH bonds to alkenes, which will allow for more environmentally friendly production of economically important chemicals such as alcohols and amines which are mass produced worldwide.
Catalysis & Methodology & Radiochemistry
To develop various organic transformations and to find methods to access 18Flabeled PET tracers more practically
Methods for mild and selective C–F bond activation and formation are studied in our lab to enable direct conversion of 19Fcontaining precursors into 18Flabeled positron emission tomography (PET) tracers. The synthesis of transition metal complexes with appropriately designed ligands will be explored to achieve the mild and selective C C–F bond activation and formation of complex molecules. This technology will be applied to develop PET imaging tracers for more efficient diagnosis and research of Alzheimer’s disease (AD).
Methods for mild and selective C–F bond activation and formation can contribute to expand PET imaging technology by allowing access to a variety of PET tracers in a short amount time. The rapidaccess technology for PET tracers will be applied to develop PET imaging tracers for more efficient diagnosis and research of Alzheimer’s disease (AD).
Transition Metal Chemistry for Activation of Small Molecules
To synthesize welldefined inorganic complexes which catalyze small molecules highly efficiently for useful chemical feedstocks
Our group is interested in the design and synthesis of welldefined lowvalent transition metal complexes for activating small molecules. The novel and practical transformations of inert small molecules such as N2, O2, CO2 and CH4 into useful chemical feedstocks will be explored. Our ultimate goal is to develop efficient and mild methods to utilize these abundant chemical feedstocks in transformations relevant to organic synthesis, industry and alternative energy.
People in our group will become an expert in inorganic and organometallic synthesis including basic organic synthetic techniques. In addition, We will also explore many spectroscopic techniques including UVvis, FTIR, EPR and multinuclear NMR, Xray crystallography ,and quantumchemical calculations (DFT) to understand chemical transformations that we are developing.