Synthetic Coordination/Bio-Inorganic/Organometallic Chemistry. Small molecule activation/ Anti-Cancer Activity of Ruthenium (II) Arene Complexes/ Transition metal polypyridyl complexes for DNA binding/cleavage/anticancer activities / Designed Photoactive Transition Metal Nitrosyl for site-specific NO delivery /Metal catalyzed Water Splitting/ Carbon Dioxide Reduction/ Hydrogen Generation. Applications of molecular catalysts in functional devices to produce solar fuels.