A5004616986- Conducting polymers and applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Surface Modification and Superhydrophobicity
- biodegradable polymer synthesis and properties
- Flame retardant materials and properties
- Supercapacitor Materials and Fabrication
- Electrochemical Analysis and Applications
- Luminescence and Fluorescent Materials
- Insect Utilization and Effects
- Environmental and Industrial Safety
- Polysaccharides and Plant Cell Walls
- Innovative Teaching and Learning Methods
- Communication in Education and Healthcare
- Various Chemistry Research Topics
- Transition Metal Oxide Nanomaterials
- Polymer Science and PVC
- Chemical Safety and Risk Management
- Additive Manufacturing and 3D Printing Technologies
- Chemistry and Chemical Engineering
- Microplastics and Plastic Pollution
- Marine Biology and Environmental Chemistry
- Lignin and Wood Chemistry
- Free Radicals and Antioxidants
- Nanocomposite Films for Food Packaging
Bentley University
2014-2025
University of Massachusetts Lowell
2008-2022
Combat Capabilities Development Command Soldier Center
2010
Plastic pollution is a concern in many nearshore ecosystems, and it critical to understand how microplastics (plastics <5 mm length) affect marine biota. Here, we report the presence of benthic, upside-down jellyfish (Cassiopea xamachana) across three estuaries south Florida. Microplastics were recovered from Cassiopea using an acid digestion, then enumerated via microscopy, identified micro Fourier-transform interferometer (μFTIR) analysis. Out 115 specimens analyzed, 77% contained...
Enzymatic synthesis of doped polypyrrole (PPy) complexes using oxidoreductases (specifically peroxidases) is very well established "green" methods for producing conducting polypyrrole. The importance this approach realized by the numerous potential opportunities PPy in biological applications. However, due to high costs and low acid stability these enzymes, there need more robust alternate biomimetic catalysts. Hematin, a hydroxyferriprotoporphyrin, has similar iron catalytic active center...
Abstract Pyrrole/EDOT copolymers were synthesized using environmentally benign enzyme catalysis. PSS was used as the solubilizing template and charge‐balancing dopant. Soybean peroxidase utilized a catalyst for copolymerization reactions to yield poly(pyrrole‐EDOT)/PSS complex. Systematic studies conducted with varying monomer feed ratios, temperature, pH. Here we report first time, catalyzed polymerization of pyrrole EDOT at an elevated pH = 5. The polymer composition determined X‐ray...
Fluorescent conjugated materials exhibiting reasonable biocompatibility that are capable of interacting with biological molecules interest for bio-sensing and imaging applications. Traditional approaches do not allow the synthesis in presence biologically relevant substrates. Further polymers synthesized using conventional methods doped fluorescent. Here we explore possibility synthesizing fluorescent oligomers indole enzymes as catalyst under mild conditions. The peroxidase catalyzed...
ABSTRACT The enzyme catalyzed polymerization of flame retardant (FR) polymers from the renewable resource 2‐(4‐hydroxyphenyl) ethanol (HPE), commonly known as tyrosol, is presented. synthesis environmentally friendly and requires only monomer, peroxidase catalyst, dilute hydrogen peroxide, deionized water. Phenolic are produced in short, one pot, high yield reactions that require minimal purification. Fourier transform infrared spectroscopy 1 H‐NMR analysis suggest coupled through 1, 2, 4, 5...
Engaging students in class is paramount if they are to gain a deep understanding of content. Student engagement manifested by attention the various components instruction. However, there little research at tertiary level focusing on what aspects instruction related changes student during class. To address this gap, we collected multiple streams data that provide measure We had an organic chemistry course who wear hats with camera mounted brim, record gaze (i.e. looking board, notes, and...
There is a need for more courses that directly address the role business plays in development of new products and technology. This particularly true areas green sustainable chemistry where altruism often not enough to overcome perceived increased cost. Chemistry Sustainable Products an undergraduate course designed students interested environmentally benign consumer products. It was create "pull market" greener materials by training next leaders some foundational science behind safer The...
Aniline and its ring-substituted derivatives are oxidatively polymerized by H2O2 to the corresponding electrically conductive emeraldine oxidation state in dilute aqueous acids when 5 M CaCl2 is added as an ionic strength booster. Evidence consistent with intermediacy of HOCl primary oxidant presented, which formed situ this system. This study significantly advances scope our previous report on aniline polymerization using H2O2/NaCl/HCl For example, H2O2/CaCl2/HCl system increases reaction...
Abstract Bulk quantities of parent polythiophene nanofibers can be synthesized rapidly and in one step by chemical oxidative polymerization thiophene FeCl3 using freeze-dried vanadium pentoxide as seeds.
A one-pot, environmentally friendly enzymatic method is described for the synthesis a polypyrrole derivative, poly(3-methylpyrrole) (poly(3-MP)) in an aqueous solvent system. The enzyme, soybean peroxidase (SBP), was shown to successfully polymerize beta functionalized pyrrole monomer. resulting polymer semiconducting, thermally stable, and exhibited bipolaron absorptions when synthesized presence of poly(sodium 4-styrenesulfonate) (PSS). Polymers 10-camphor sulfonic acid (CSA) were found...
ABSTRACT Unusually photoluminescent undoped oligomers and doped electrically conducting polymers of 4‐(3‐Pyrrolyl)butyric acid have been enzymatically synthesized using the oxidoreductase soybean peroxidase as a catalyst. This biocatalytic approach provides direct route to fluorescent‐undoped oligomer pyrrole that requires no protection/deprotection chemistry. The synthesis is carried out in aqueous media only monomer, enzyme, hydrogen peroxide. exhibits stable emission properties highly...
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Nanostructured Polyanilines Using the H2O2/CaCl2 Oxidant System"Lekha PapammagariLekha PapammagariDepartment of Chemical Engineering, University Massachusetts Lowell, 01854, United StatesMore by Lekha Papammagari, Srikanth Rao AgnihotraSrikanth AgnihotraDepartment Agnihotra, Purnatosh SahaPurnatosh SahaDepartment Plastics Saha, Neha ManoharNeha ManoharDepartment...
Front Cover: The cover illustrates the reaction scheme of enzyme-catalyzed synthesis pyrrole/EDOT copolymers in aqueous medium at an elevated pH 5. is catalyzed by soybean peroxidase (SBP, derived from soybeans depicted background). structure active center SBP also illustrated. formation black electrically conducting copolymer pyrrole and EDOT monomers presented. Further details can be found article A. Tewari, Kokil, S. Ravichandran, Nagarajan, R. Bouldin, L. Samuelson, Nagarajan,* J. Kumar*...
The demand for multifunctionality in textiles has been increasing over the past few decades. Imparting durable using scalable coating process while retaining flexibility, porosity, drapability of fabric is a significant challenge. Current solutions available to impart flame retardant (FR) characteristics have deleterious environmental impact and most fabrics do not offer insect repellant characteristics. Insecticides such as permethrin are commonly coated onto vector protection but lack...