A5078388595- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Ionic liquids properties and applications
- Advanced Battery Technologies Research
- Microfluidic and Bio-sensing Technologies
- Luminescence and Fluorescent Materials
- Enzyme Catalysis and Immobilization
- Electrochemical sensors and biosensors
- Porphyrin and Phthalocyanine Chemistry
- Nanopore and Nanochannel Transport Studies
- Advanced biosensing and bioanalysis techniques
- Microbial Metabolic Engineering and Bioproduction
- Electrochemical Analysis and Applications
- Polyoxometalates: Synthesis and Applications
- Analytical Chemistry and Sensors
- Nanoplatforms for cancer theranostics
- Supramolecular Self-Assembly in Materials
- Analytical Chemistry and Chromatography
- Surfactants and Colloidal Systems
- Covalent Organic Framework Applications
- Force Microscopy Techniques and Applications
- Microfluidic and Capillary Electrophoresis Applications
- Conducting polymers and applications
- Biosensors and Analytical Detection
- Lanthanide and Transition Metal Complexes
Florida International University
2014-2024
Louisiana State University
2008-2015
International University
2013
Moscow Institute of Thermal Technology
2012
Massachusetts Institute of Technology
2011
University of Akron
2003-2010
Winston-Salem State University
2010
Oak Ridge National Laboratory
2008-2010
University of Louisville
2010
University of Iowa
2010
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTMolecular Fluorescence, Phosphorescence, and Chemiluminescence SpectrometrySusmita Das†, Aleeta M. Powe‡, Gary A. Baker§, Bertha Valle⊥, Bilal El-Zahab¶, Herman O. Sintim∥, Mark Lowry#, Sayo Fakayode∇, Matthew E. McCarroll○, Gabor Patonay◆, Min Li□, Robert Strongin#, Maxwell L. Geng⬡, Isiah Warner*†View Author Information† Department of Chemistry, Louisiana State University, Baton Rouge, 70803, United States‡ University Louisville, Kentucky 40208,...
Abstract Efficient cofactor regeneration and reuse are highly desired for many important biotransformation applications. Here we show the first time that NAD(H) covalently attached to micro particles, which can be easily recovered reused, effectively mediated multistep reactions catalyzed by enzymes were also immobilized with particles. Such an enzyme‐cofactor catalytic system was examined production of methanol from CO 2 in situ regeneration. Four including formate, formaldehyde, alcohol,...
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTFluorescence, Phosphorescence, and ChemiluminescenceNoureen Siraj†, Bilal El-Zahab‡, Suzana Hamdan†, Tony E. Karam†, Louis H. Haber†, Min Li§, Sayo O. Fakayode∥, Susmita Das⊥, Bertha Valle⊗, Robert M. Strongin○, Gabor Patonay#, Herman Sintim×, Gary A. Baker$, Aleeta Powe¶, Mark Lowry○, Jan Karolin&, Chris D. Geddes&, Isiah Warner*†View Author Information† Department of Chemistry, Louisiana State University, Baton Rouge, 70803, United States‡...
Herein, we report on near-infrared (NIR) fluorescent nanoparticles generated from an emergent class of materials refer to as a Group Uniform Materials Based Organic Salts (GUMBOS). GUMBOS are largely frozen ionic liquids, although the concept is more general and also easily applied solid with melting points in excess 100 °C. Nanoparticles based (nanoGUMBOS) derived NIR fluorophore prepared using reprecipitation method evaluated for vivo fluorescence imaging. Due their uniformity, single-step...
Novel room temperature magnetic chiral ionic liquids derived from amino acids were synthesized and their properties as well discrimination abilities investigated.
We herein report the preparation and investigation of antibacterial activity biocidal ionic liquids (ILs) consisting cationic imidazolium or pyridinium an anionic β-lactam antibiotic. The properties were quantified by measuring minimum inhibitory concentration bactericidal against Escherichia coli O157:H7, Klebsiella pneumoniae, Staphylococcus aureus, Enterococcus faecium. In general, ILs had improved than their parent materials, whether individually in combination. 83% experiments,...
Template-free controlled aggregation and spectral properties in fluorescent organic nanoparticles (FONs) is highly desirable for various applications. Herein, we report a nontemplated method controlling the near-infrared (NIR) cyanine-based derived from group of uniform materials based on salts (GUMBOS). Cationic heptamethine cyanine dye 1,1′,3,3,3′,3′-hexamethylindotricarbocyanine (HMT) was coupled with five different anions, viz., [NTf2−], [BETI−], [TFPB−], [AOT−], [TFP4B−], by an...
Ionic liquid (IL) chemistry has evolved over the past century, such that these organic salts have impacted virtually every area of science and engineering. In chemistry, initial applications were primarily domain chemists or chemical engineers who desired to manipulate properties IL solvents for a variety including tuning various processes. Since then, progressed changing an important property solvent (e.g., melting point hydrophobicity) often involves simply altering counterion salt. It is...
The ability to control the morphologies and spectral properties of organic low-dimensional nanomaterials is paramount importance. research reported herein demonstrates a template-free approach tailored morphological optical for novel class pseudoisocyanine (PIC)-based fluorescent nanoparticles derived from group uniform materials based on salts (GUMBOS). synthesized nanoscale PIC-based particles (termed nanoGUMBOS), [PIC][NTf2] [PIC][BETI], exhibit interesting adaptability as function...
Excessive production of reactive oxygen species can lead to alteration cellular functions responsible for many diseases including cardiovascular diseases, neurodegenerative cancer, and aging. Hydroxyl radical is a short-lived which considered very aggressive due its high reactivity toward biological molecules. In this study, COumarin-NEutral Red (CONER) nanoprobe was developed detection hydroxyl based on the ratiometric fluorescence signal between 7-hydroxy coumarin 3-carboxylic acid neutral...
The size and uniformity of magnetic nanoparticles developed from a group uniform materials based on organic salts (GUMBOS) were controlled using an in situ ion exchange, water-in-oil (w/o) microemulsion preparation. Most these nanoGUMBOS are fact ionic liquids (i.e., melting points less than 100 degrees C), while others have above the conventional C demarcation. Simple variations reagent concentrations following w/o approach allowed us to smoothly predictably vary nanoparticle dimensions...
Abstract The polysulfide shuttle effect remains a fundamental challenge in lithium-sulfur batteries, particularly for high-energy-density applications where conventional mitigation strategies prove insufficient. Here, we introduce state-resolved methodology quantifying current by analyzing Coulombic efficiency across discretized charging blocks, addressing limitations traditional voltage-dependent measurement techniques. Through systematic analysis of cells with and without LiNO₃ additive,...
Abstract Multistep reactions catalyzed by a covalently immobilized enzyme‐cofactor‐enzyme system were achieved. Lactate dehydrogenase (LDH), glucose (GDH), and cofactor NADH incorporated into two porous silica glass supports. One of the supports had pores 30 nm in diameter, while other was 100‐nm pore size. Effective shuttling bound between LDH GDH achieved, such that regeneration cycles NADH/NAD + observed. The 30‐nm size afforded enzyme activities about twice those observed for size,...
We present a facile, scalable, and general method for the size-variable generation of monodispersed, near-spherical solid-state (frozen) ionic liquid nanoparticles based on novel melt−emulsion−quench approach. Simple manipulation internal templating droplets within oil-in-water (o/w) microemulsions also permits formation well-defined microspheres. This simple rapid preparation, requiring neither specialized equipment nor harsh conditions, suggests wealth potential these designer...
Efficient conversion of carbon dioxide is great interests to today's endeavors in controlling greenhouse gas emission. A multienzyme catalytic system that uses and ethanol produce L-lactate was demonstrated this work, thereby providing a novel reaction route convert bio-based an important building block for synthesis biodegradable polymers. The synthetic has unique internal cofactor regeneration cycle, eliminating the need additional chemical or energy regeneration. Lactate successfully...
A novel vapor-sensitive composite film comprising cellulose acetate and a representative compound (1-n-butyl-2,3-dimethylimidazolium hexafluorophosphate) from Group of Uniform Materials Based on Organic Salts (GUMBOS) has been developed characterized. The vapor sensing characteristics the is investigated using quartz crystal microbalance (QCM) transducer. material exhibited greatly improved performance toward number organic vapors. It demonstrated that ratio change in resonance frequency...
Gel polymer electrolytes (GPE) and composite GPE (cGPE) using one-dimensional glass microfillers have been developed for their use in lithium-oxygen batteries. Using microfillers, tetraglyme solvent, UV-curable polymer, lithium salt at various concentrations, the preparation of cGPE yielded free-standing films. These cGPEs, with 1 wt % demonstrated increased ionic conductivity transference number over GPEs concentrations salt. Improvements as high 50% 28% were observed 0.1 1.0 mol kg-1...
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTMolecular Fluorescence, Phosphorescence, and Chemiluminescence SpectrometryAleeta M. Powe†, Susmita Das‡, Mark Lowry‡, Bilal El-Zahab‡, Sayo O. Fakayode§, Maxwell L. Geng∥, Gary A. Baker⊥, Lin Wang⊗, Matthew E. McCarroll⊗, Gabor Patonay○, Min Li‡, Mohannad Aljarrah‡, Sharon Neal#, Isiah Warner*‡View Author Information Department of Chemistry, University Louisville, Kentucky 40208, Louisiana State University, Baton Rouge, 70803, Winston-Salem...
Lanthanide photochemistry has been frequently studied for its high luminescence intensity, narrow emission band, and stable luminescent lifetime decay. In the work presented here, nanoparticles prepared using an aerosolization process were derived from europium-based GUMBOS (Group of Uniform Material Based on Organic Salts). These characterized electron microscopy, X-ray photoelectron spectroscopy (XPS), absorbance, photoluminescence spectroscopy. An average diameter 39.5 ± 8.4 nm our was...
We report on the synthesis and characterization of a PEGylated IR786 GUMBOS (Group Uniform Materials Based Organic Salts). The this material was accomplished using three step protocol: (1) substitution chloride cyclohexenyl ring in heptamethine chain by 6-aminohexanoic acid, (2) grafting methoxy polyethylene glycol (MeOPEG) onto acid via an esterification reaction, (3) anion exchange between [PEG786][I] lithium bis(trifluoromethylsulfonyl)imide (LiNTf2) or sodium...
Herein we report the synthesis of a fluorescent organic salt through anion exchange and subsequent fabrication 1D-nanostructures via facile templating method.
Li–oxygen (Li-O2) cathodes using palladium-coated and palladium-filled carbon nanotubes (CNTs) were investigated for their battery performance. The full discharge of batteries in the 2–4.5 V range showed 6-fold increase first cycle Pd-filled over pristine CNTs 35% Pd-coated counterparts. also exhibited improved cyclability with 58 cycles 500 mAh·g−1 at current density 250 mA·g−1 versus 35 43 CNTs, respectively. In this work, effect encapsulating Pd catalysts inside proved to stability...