A5081184910- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Radical Photochemical Reactions
- Catalytic C–H Functionalization Methods
- Electrochemical Analysis and Applications
- Hydrogels: synthesis, properties, applications
- Oxidative Organic Chemistry Reactions
- Synthesis and Catalytic Reactions
- Advanced Photocatalysis Techniques
- Advanced battery technologies research
- Polymer composites and self-healing
- Scheduling and Optimization Algorithms
- Nonlinear Dynamics and Pattern Formation
- Electrocatalysts for Energy Conversion
- Sulfur-Based Synthesis Techniques
- Advanced Chemical Sensor Technologies
- Organic Electronics and Photovoltaics
- Caveolin-1 and cellular processes
- Phenothiazines and Benzothiazines Synthesis and Activities
- Synthetic Organic Chemistry Methods
- Luminescence and Fluorescent Materials
- Perovskite Materials and Applications
- Silicone and Siloxane Chemistry
- Conducting polymers and applications
- Supramolecular Self-Assembly in Materials
Northwestern University
2023-2024
University of Wisconsin–Madison
2019-2024
Northwestern University
2023
University of Kentucky
2016-2019
University of Strathclyde
2017
This study aims to advance our understanding of the physical and electrochemical behavior nonaqueous redox electrolytes at elevated concentrations develop experimentally informed structure–property relationships that may ultimately enable deterministic design soluble multielectron-transfer organic couples for use in flow batteries. To this end, we functionalized a phenothiazine core simultaneously impart two desired properties: high solubility multiple electron transfer. Specifically, report...
Over the past decade, there has been a renewed interest in use of transition metal polypyridyl complexes as photoredox catalysts for variety innovative synthetic applications. Many derivatives these are known, and effect ligand modifications on their efficacy subject extensive, systematic investigation. However, influence photocatalyst counteranion received little attention, despite fact that generally cationic nature. Herein, we demonstrate effects exert surprising, dramatic impact rate...
Embedding dynamic covalent bonds into polymer compositions transforms static thermosets active materials with the reprocessability of thermoplastics and bulk properties cross-linked networks. This class next-generation materials, called adaptable networks, shows significant promise in composites, soft optoelectronics, robotics. Herein, we synthesized two oligosiloxane-based epoxy networks that provide fast bond exchange. Oligosiloxane diepoxides were cured stoichiometric amounts...
Stereoinduction in complex organic reactions often involves the influence of multiple stereocontrol elements. The interaction among these can result observation significant cooperative effects that afford different rates and selectivities between matched mismatched sets stereodifferentiating chiral elucidation matched/mismatched ground-state chemical was a critically important theme maturation modern stereocontrolled synthesis. development robust methods for control photochemical reactions,...
Stereochemical control of photochemical reactions that occur via triplet energy transfer remains a challenge. Suppressing off-catalyst stereorandom reactivity is difficult for highly reactive open-shell intermediates. Strategies suppressing racemate-producing, pathways have long focused on formation ground state, substrate-catalyst chiral complexes are primed photocatalyst in contrast to their counterparts. Herein, we describe strategy where both catalyst-associated vinylpyridine and...
A multitude of techniques are available to obtain a useful understanding photocatalytic mechanisms. The combination LED illumination with nuclear magnetic resonance spectroscopy (LED–NMR) provides rapid, convenient means directly monitor reaction in situ. Herein, we describe study the mechanism an enantioselective intermolecular [2 + 2] photocycloaddition catalyzed by chiral Ir photocatalyst using LED–NMR. data-rich output this experiment is suitable for same-excess and variable time...
The di-π-methane (DPM) rearrangement is an important organic photorearrangement that converts 1,4-diene-containing compounds to vinyl cyclopropanes, often resulting in extensive, synthetically valuable restructuring of the substrate's carbon framework. We investigated influence Lewis and Brønsted acids on DPM dibenzobarrelenes. These studies have culminated identification a dual chiral acid-iridium photosensitizer system enables first highly enantioselective catalytic all-carbon rearrangement.
Subtle changes in the choice of chalcogen atom benzochalcogenadiazole ‘small molecules’ can lead to a marked difference PCE bulk heterojunction organic solar cells.
Phenothiazines have seen widespread use as stable electron-donating organic compounds with generally oxidized states, making them an amenable core for functionalization toward electrochemical energy storage applications. With phenothiazine itself a starting material, of the 3, 7, and 10 positions is facile, providing options to modify redox potentials improve stability in both neutral singly (radical cation) states. In one three steps, we can create highly soluble, derivatives that are...
Dithioalkylidenes are a newly-developed class of conjugate acceptors that undergo thiol exchange via an associative mechanism, enabling decoupling key material properties for sustainability, biomedical, and sensing applications. Here, we show the rate reaction in aqueous environments is highly sensitive to structure acceptor tunable over four orders magnitude. Cyclic rapidly, from 0.95 15.6 M-1s-1, while acyclic between 3.77x10-3 2.17x10-2 M-1s-1