Department of Chemistry
Recent Submissions
-
A Radiotracer study of the adsorption behaviour of aqueous Ba2+ ions on nonoparticles of zero-valent iron
(Elsevier, 2007-09-30)Recently, iron nanoparticles are increasingly being tested as adsorbents for various types of organic and inorganic pollutants. In this study, nanoparticles of zero-valent iron (NZVI) synthesized under atmospheric conditions ... -
Effect of Ti(IV) loading on CH4 oxidation activity and SO2 tolerance of Pd catalysts supported on silica SBA-15 and HMS
(Elsevier, 2011-08-11)Pure silica SBA-15 and HMS and corresponding Ti(IV) modified mesoporous silica, with 5 and 10 wt% of TiO2, were prepared and used as support for palladium (1 wt%) catalysts. The materials, analysed by XPS, XRD, BET, NH3-TPD ... -
Near-IR Absorbing BODIPY Derivates as Glutathione-Activated Photosensitizers for Selective Photodynamic Action
(Wiley-VCH Verlag, 2014)Enhanced spatiotemporal selectivity in photonic sensitization of dissolved molecular oxygen is an important target for improving the potential and the practical applications of photodynamic therapy. Considering the high ... -
Characterization of Zr6Nb2O17 synthesized by a peroxo route as a novel solid acid
(Elsevier, 2008-03-20)The impregnation of hydrated zirconia at pH 0.5 with a solution of peroxoniobium(V) complex, [Nb2(O2)3] 4+, ensuring a ZrO2:Nb2O5 mole ratio of 6:1 followed by calcination at 873 K resulted in the formation of a Zr6Nb2O17 ... -
Quantum efficiency enhancement in film by making nanoparticles of polyfluorene
(Optical Society of America, 2008)We report on conjugated polymer nanoparticles of polyfluorene that were formed to exhibit higher fluorescence quantum efficiency in film (68%) and reduce undesired emission peak wavelength shifts in film (by 20 nm), compared ... -
Morphology-Dependent Energy Transfer of Polyflorene Nanoparticeles Decorating InGaN/GaN Quantum-Well Nanopillars
(American Chemical Society, 2013)Conjugated polymer nanoparticles (CPNs), prepared in aqueous dispersion from poly[(9,9-bis{3-bromopropyl}fluorenyl-2,7-diyl)-co-(1,4-benzo-{2,1,3}-thiodia- zole)] (PFBT-Br), are incorporated into a nanopillar architecture ... -
White emitting polyfluorene functionalized with azide hybridized on near-UV light emitting diode for high color rendering index
(Optical Society of America, 2008)We develop and demonstrate high-quality white light generation that relies on the use of a single-type simple conjugated polymer of polyfluorene functionalized with azide groups (PFA) integrated on a near-UV LED platform. ... -
Synthesis, characterization and surface properties of amphiphilic polystyrene-b-polypropylene glycol block copolymers
(Elsevier, 2006-04)The new macroazoinitiators containing poly (propylene glycol), (PPG), with molecular weight 400 and 2000, having hydrophilic character, were synthesized and polymerized with styrene to prepare PS-b-PPG block copolymers. ... -
Probing the charge build-up and dissipation on thin PMMA film surfaces at the molecular level by XPS
(Wiley-VCH Verlag, 2012)What's the charge? X-ray photoelectron spectroscopy was used to determine the charge state and dynamics of charge build-up and decay on a thin poly(methyl methacrylate) film. The film is initially negatively charged to ... -
Chromogenic and Fluorogenic Sensing of Biological Thiols in Auqeous Solutions Using BODIPY-Based Reagents
(American Chemical Society, 2013)udicious design of BODIPY dyes carrying nitroethenyl substituents in conjugation with the BODIPY core yields dyes that respond to biological thiols by both absorbance and emission changes. Incorporation of solubilizing ... -
Gate-Tunable Photoemission from Graphene Transistors
(American Chemical Society, 2014)In this Letter, we report gate-tunable X-ray photoelectron emission from back-gated graphene transistors. The back-gated transistor geometry allows us to study photoemission from graphene layer and the dielectric substrate ... -
Spatially Confined Redox Chemistry in Periodic Mesoporous Hydridosilica-Nanosilver Grown in Reducing Nanopores
(American Chemical Society, 2011-09-26)Periodic mesoporous hydridosilica, PMHS, is shown for the first time to function as both a host and a mild reducing agent toward noble metal ions. In this archetypical study, PMHS microspheres react with aqueous Ag(I) ... -
FT-IR spectroscopic investigation of the reactivity of NOx species adsorbed on Cu2+/ZrO2 and CuSO4/ZrO2 catalysts toward decane
(Elsevier, 2003-04-15)The nature of the NOx species produced on NO adsorption and its co-adsorption with O-2 at room temperature on zirconia-supported copper(II) catalysts has been studied by means of in situ FT-IR spectroscopy. The samples ... -
Supramolecular Assemblies Constructed by Cucurbituril-Catalyzed Click Reaction
(Wiley Online Library, 2011)Cucurbituril homologues are multi-functional macrocycles that can find applications in many areas and have numerous interesting features setting them apart from the other macrocycles. Among them, the ability of one of the ... -
Routes of formation and composition of NOx complexes adsorbed on palladium-promoted tungstated zirconia
(Elsevier, 2006-03-16)Surface species obtained during the adsorption of NO and NO/O2 coadsorption at room temperature on Pd-free (WZ) and Pd-promoted tungstated zirconia (Pd/WZ) are identified by means of in situ FT-IR spectroscopy. The WZ and ... -
Weighted-Residual Methods for the Solution of Two-Particle Lippmann-Schwinger Equation without Partial-Wave Decomposition
(Springer Verlag, 2014-01)Recently there has been a growing interest in computational methods for quantum scattering equations that avoid the traditional decomposition of wave functions and scattering amplitudes into partial waves. The aim of the ... -
Electrochemically generated catalyst system with increased specificity and efficiency for olefin metathesis
(Elsevier, 2003-11-01)A facile route for the electrochemical generation of an olefin metathesis catalyst from methylene chloride solution Of WCl6 was described. It was found that reductive, oxidative and pulse electrolysis produced the same ... -
Electronic structure of conducting organic polymers: insights from time-dependent density functional theory
(John Wiley and Sons, 2014)Conducting organic polymers (COPs) became an active field of research after it was discovered how thin films rather than insoluble infusible powders can be produced. The combination of the properties of plastics with those ... -
Red emitting cucurbituril-capped, pH-responsive conjugated oligomer-based nanoparticles for drug delivery and cellular Imaging
(American Chemical Society, 2014-07-30)Here we report the synthesis of nanoparticles based on a conjugated oligomer which is synthesized through Heck-coupling of divinylfluorene and dibromobenzothiodiazole monomers. These water dispersible nanoparticles emit ... -
Assembling Photoluminescent Silicon Nanocrystals into Periodic Mesoporous Organosilica
(American Chemical Society, 2012-04-18)A contemporary question in the intensely active field of periodic mesoporous organosilica (PMO) materials is how large a silsesquioxane precursor can be self-assembled under template direction into the pore walls of an ...
