A5052284348- X-ray Diffraction in Crystallography
- Synthetic Organic Chemistry Methods
- Crystallization and Solubility Studies
- Force Microscopy Techniques and Applications
- Polyoxometalates: Synthesis and Applications
- Cellular Mechanics and Interactions
- Luminescence and Fluorescent Materials
- Advanced Drug Delivery Systems
- Mesoporous Materials and Catalysis
- Tactile and Sensory Interactions
- HIV Research and Treatment
- Organometallic Complex Synthesis and Catalysis
- Silicone and Siloxane Chemistry
- Porphyrin and Phthalocyanine Chemistry
- Analytical Chemistry and Sensors
- Fuel Cells and Related Materials
- Mechanical and Optical Resonators
- biodegradable polymer synthesis and properties
- RNA Interference and Gene Delivery
- Molecular Junctions and Nanostructures
- Advanced Sensor and Energy Harvesting Materials
- Elasticity and Material Modeling
- Carbon Nanotubes in Composites
- Polymer composites and self-healing
- Polymer Nanocomposites and Properties
Duke University
2022-2025
Flexible and lightweight sensors can assess their environment for applications that include wearables health monitoring soft robotics.
Non-covalent BigSMILES enables the representation of donor/acceptor interactions and delocalized bonds for polymer assemblies.
The tearing of a polymer network arises from mechanochemically coupled bond-breaking events in the backbone chain. An emerging research area is identification molecular strategies for toughening, such as strategic placement reactive groups (e.g., scissile mechanophores) crosslinks instead load-bearing primary strands. These mechanically labile crosslinkers have typically relied on release ring strain or weak covalent bonds selective bond scission. Here, we report novel chemical design...
The cis- and trans-isomers of a silacycloheptene were selectively synthesized by the alkylation silyl dianion, novel approach to strained cycloalkenes. trans-silacycloheptene (trans-SiCH) was significantly more than cis isomer, as predicted quantum chemical calculations confirmed crystallographic signatures twisted alkene. Each isomer exhibited distinct reactivity toward ring-opening metathesis polymerization (ROMP), where only trans-SiCH afforded high-molar-mass polymer under...
We report that differences in ring strain enthalpy between cis and trans isomers of sila-cycloheptene provide a driving force for both polymerization depolymerization via olefin metathesis. A need for...
Four unsaturated poly(carbooligosilane)s (P1–P4) were prepared via acyclic diene metathesis polycondensation of new oligosilane monomers (1–4). These novel polymers with varying main-chain Si incorporation have high trans internal olefin stereochemistry (ca. 80%) and molecular weights (9500–21,700 g mol–1). Postpolymerization epoxidation converted all alkene moieties to epoxides rendered the (P5–P8) more electrophilic, which allowed for single-molecule force spectroscopy studies a modified...