A5084561519- Silicone and Siloxane Chemistry
- Surface Modification and Superhydrophobicity
- Synthesis and properties of polymers
- Photochromic and Fluorescence Chemistry
- Advanced Chemical Sensor Technologies
- Polydiacetylene-based materials and applications
- Fiber-reinforced polymer composites
- Conducting polymers and applications
- Advanced ceramic materials synthesis
- Supramolecular Self-Assembly in Materials
- Advanced Polymer Synthesis and Characterization
- biodegradable polymer synthesis and properties
- Marine Biology and Environmental Chemistry
- Inorganic Fluorides and Related Compounds
- Advanced Sensor and Energy Harvesting Materials
- Photoreceptor and optogenetics research
- Molecular Sensors and Ion Detection
- Porphyrin and Phthalocyanine Chemistry
- Synthetic Organic Chemistry Methods
University of California, Santa Barbara
2017-2020
United States Air Force Research Laboratory
2013
Edwards Air Force Base
2011-2012
A class of tunable visible and near-infrared donor-acceptor Stenhouse adduct (DASA) photoswitches were efficiently synthesized in two to four steps from commercially available starting materials with minimal purification. Using either Meldrum's or barbituric acid "acceptors" combination aniline-based "donors", an absorption range spanning 450 750 nm is obtained. Additionally, photoisomerization results complete decoloration for all adducts, yielding fully transparent, colorless solutions...
Abstract The utility of Meldrum's activated furan (MAF) for the colorimetric detection sub ppm levels amines in solution, on solid supports, and as vapors is reported. MAF synthesized one step from inexpensive commercially available starting materials exhibits high selectivity primary secondary presence competing nucleophiles. reaction between furans results a distinct color change, discernable by naked eye. UV/Vis absorption spectroscopy was utilized to monitor reactions solution determine...
The development and application of novel activated furan copolymers is reported. platform provides a colorimetric method for sensing amines in aqueous media through the generation highly colored donor–acceptor Stenhouse adduct (DASA). Furthermore, resulting DASA–polymer conjugates, which are obtained after amine sensing, characterized to determine fundamental structure–property relationships this emerging class negative photochromic species.
A novel synthetic method was developed for the controlled functionalization of fluorinated polyhedral oligomeric silsesquioxanes (F-POSS), which are useful as low surface energy materials superhydrophobic and superoleophobic materials. Utilizing triflic acid, open-cage compounds were created then reacted with a variety dichlorosilanes to produce functional F-POSS structures possessing alkyl-, aryl-, acrylate-based moieties. The crystal structure an endo,endo-disilanol compound determined by...
Reversible addition–fragmentation chain transfer (RAFT) polymerization techniques were used to copolymerize an F-POSS macromer with methyl methacrylate (MMA) produce novel copolymers that possess excellent wetting-resistant behaviour and are the first examples of covalently bound nanocomposites for improved surface robustness. These F-POSS/MMA have also been coat cotton fabrics, resulting in both superhydrophobic oleophobic behaviour.
Volatile amines are present in our daily life as a result of chemical manufacturing, agriculture and farming, release by rotten food or exhalation under certain medical conditions diseases. An efficient, fast low-cost method for detecting these compounds is desired due to their often-toxic nature. The development highly sensitive electrospun colourimetric sensor the detection volatile reported here. Composite microfibrous meshes were obtained incorporating activated furan adducts (FAs) into...
Abstract The utility of pentafluorophenyl esters for the selective introduction functional units and branch points in well‐defined poly(acrylic acid) (PAA) derivatives is demonstrated using a combination controlled radical polymerization postpolymerization modification. Reversible addition‐fragmentation chain transfer enables synthesis copolymers—poly(pentafluorophenyl acrylate‐co‐ tert ‐butyl acrylate)—with active ester repeat serving as attachment reaction with primary amines, specifically...