A5073193034- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Supercapacitor Materials and Fabrication
- CO2 Reduction Techniques and Catalysts
- Advanced Photocatalysis Techniques
- Electrochemical Analysis and Applications
- Conducting polymers and applications
- Nitric Oxide and Endothelin Effects
- Perovskite Materials and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Metal-Catalyzed Oxygenation Mechanisms
- Metal-Organic Frameworks: Synthesis and Applications
- Polyoxometalates: Synthesis and Applications
- Vanadium and Halogenation Chemistry
- Quantum Dots Synthesis And Properties
- Advanced Polymer Synthesis and Characterization
- Copper-based nanomaterials and applications
- Radical Photochemical Reactions
University of California, Santa Barbara
2021-2023
Indian Institute of Science Bangalore
2018-2021
The necessity of well-tuned reactivity for successful controlled polymer synthesis often comes with the price limited monomer substrate scope. We demonstrate here on-demand interconversion between living radical and cationic polymerization using two orthogonal stimuli a dual responsive single catalyst. photo- electrochemical 10-phenylphenothiazine catalyst provides control polymer's molar mass composition by orthogonally activating common dormant species toward distinct chemical routes. This...
The storage of renewable energy in ammonia (NH3) is a promising alternative to hydrogen (H2) for our transition from fossil fuels. Solid oxide fuel cells (SOFCs) are the leading technology direct (DAFCs); however, their high temperature operation makes them unsuitable light-duty vehicles. As such, there has been growing interest aqueous-fed DAFCs. Such technologies face challenges with respect reaction selectivity, precious metal catalyst loading, and stability; dearth reported molecular...
We synthesized CuAlS2/ZnS quantum dots (QDs) composed of biocompatible, earth-abundant elements that can reduce salts carbon dioxide under visible light. The use an asymmetric morphology at a type-II heterointerface balances multiple requirements photoredox agent by providing low optical bandgap (∼1.5 eV), large cross section (>10–16 cm2 above 1.8 spatial proximity both semiconductor components to the surface, as well photochemical stability. QDs thus have unprecedented activity in terms...
Ion-selective membranes are an essential, yet expensive fixture in redox flow batteries, preventing charge carrier crossover between the two half-cells. This work demonstrates viability of replacing these with electrolyte solution that is mutually immiscible half-cell solutions, eliminating direct anolyte–catholyte interface leads to self-discharge existing biphasic cells. We developed a simple dichloromethane (DCM)/water model system consisting carriers organic phase connected by aqueous...
Coordination induced bond weakening (CIBW) leads to facile PCET at various E–H bonds.
Abstract Redox flow batteries (RFBs) employing nonaqueous electrolytes could potentially operate at much higher cell voltages, and therefore afford energy power densities, than RFBs aqueous electrolytes. The development of such high‐voltage requires anolytes that are electrochemically stable, especially in the presence traces oxygen and/or moisture. inherent atmospheric reactivity mandates judicious molecular design with high electron affinity electrochemical stability. In this study,...
Reaction of MBr2 with 3 equiv [K(18-crown-6)][O2N2CPh3] generates the trityl diazeniumdiolate complexes [K(18-crown-6)][M(O2N2CPh3)3] (M = Co, 2; Fe, 3) in good yields. Irradiation 2 and using 371 nm light led to NO formation 10 1% yields (calculated assuming a maximum 6 produced per complex), respectively. N2O was also formed during photolysis 2, 63% yield, whereas N2O, as well Ph3CN(H)OCPh3, 37 5% yields, These products are indicative fragmentation via both C-N N-N bond cleavage pathways....
Redox flow batteries (RFBs) are leading contenders for grid-scale energy storage devices. 1 . RFBs can be rapidly deployed and demonstrate high durability (>10,000 cycles 2 ), making them appealing long-term storage. Despite these advantages, commercial hampered by capital costs. Ion-selective membranes in RFB cell stacks make up a significant fraction (up to ~37% 3 ) of the cost – both new expanding existing RFBs. The need large membrane area stems from power capacity (maximum...
The development of inexpensive charge carriers with long-term stability is critical to increase the economic viability redox flow batteries (RFBs). Herein, we compare performance metrics a series synthesized or commercially available phthalocyanine metal (PcM) varying metal- ligand-based substitution patterns. All systems were charged–discharged as slurries in conjunction conductive heterogeneous carbon source, Ketjenblack (KB). synthesized, peripherally substituted...