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Browsing Department of Chemistry - Faculty Publications by Title

Now showing items 21-40 of 244

Adsorption of atomic hydrogen at a nanostructured electrode of polyacrylate-capped Pt nanoparticles in polyelectrolyte

Markarian M.Z.; El Harakeh M.; Halaoui L.I. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2005)

Atomic hydrogen electrosorption is reported at crystallite sites of polyacrylate-capped Pt nanoparticles (〈d〉) = 2.5 ± 0.6 nm), by assembling nanostructured electrodes of polyacrylate-Pt nanocrystallites layer-by-layer in ...
Altering the emission behavior with the turn of a thiophene ring: The photophysics of condensed ring systems of alternating benzenes and thiophenes

Wex B.; Kaafarani B.R.; Danilov E.O.; Neckers D.C. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2006)

Six aromatic compounds with embedded thiophenes differing in the number of rings (2-5) and thiophene orientation along the long axis of the molecule (syn, anti) were investigated. Photophysical properties, steady-state ...
Amplification of solar energy conversion in quantum-confined CdSe-sensitized TiO2 photonic crystals by trapping light

Bayram S.; Halaoui L. (WEINHEIMBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY, 2013)

Photonic effects amplifying solar energy conversion are reported in titania inverse opals sensitized with quantum-confined CdSe films. TiO2 inverse opals (i-TiO2-o) and unstructured nanocrystalline TiO 2 (nc-TiO2) films ...
An oxazolo[3,2-b]indazole route to 1H-lndazolones

Oakdale J.S.; Solano D.M.; Fettinger J.C.; Haddadln M.J.; Kurth M.J. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2009)

The novel heterocycle 2,3-dlhydrooxazolo[3,2-b]lndazole has been synthesized and utilized to provide easy access to 1 H-lndazolones, particularly the previously unreported 2-(2-alkoxyethyl)-1 H-lndazol-3(2H)-ones. Mechanistic ...
Anti-colon cancer effects of Salograviolide A isolated from Centaurea ainetensis

El-Najjar N.; Dakdouki S.; Darwiche N.; El-Sabban M.; Saliba N.A.; Gali-Muhtasib H. (ATHENS1, S MERKOURI ST, EDITORIAL OFFICE,, ATHENS 116 35, GREECE, 2008)

The antitumor activity of extracts of Centaurea ainetensis (C. ainetensis), a plant endemic to Lebanon, was investigated in human colon carcinoma cells. At concentrations that were non-cytotoxic to normal human intestinal ...
Antibiotic removal from water: Elimination of amoxicillin and ampicillin by microscale and nanoscale iron particles

Ghauch A.; Tuqan A.; Assi H.A. (, 2009)

Zerovalent iron powder (ZVI or Fe0) and nanoparticulate ZVI (nZVI or nFe0) are proposed as cost-effective materials for the removal of aqueous antibiotics. Results showed complete removal of Amoxicillin (AMX) and Ampicillin ...
Application and new developments in fluorescence spectroscopic techniques in studying individual molecules

Patra D. (PHILADELPHIA325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA, 2008)

Techniques based on fluorescence have played a variety of roles in chemistry, physics, spectroscopy, medicine, nanotechnology, and biotechnology due to their high selectivity, sensitivity, simplicity, and fastness in ...
Application of synchronous fluorescence scan spectroscopy for size dependent simultaneous analysis of CdTe nanocrystals and their mixtures

Patra D.; Ghaddar T.H. (AMSTERDAMPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2009)

In this paper, synchronous fluorescence scan (SFS) spectroscopy has been applied for the first time for the simultaneous determination of a mixture of CdTe fluorescent nanocrystals (NCs) of various sizes without a ...
Aqueous removal of diclofenac by plated elemental iron: Bimetallic systems

Ghauch A.; Abou Assi H.; Bdeir S. (AMSTERDAMPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2010)

The aqueous removal of diclofenac (DF) by micrometric iron particles (Fe0) and amended Fe0 (Me0(Fe0)) under oxic and anoxic conditions was investigated. Bimetallic systems were obtained by plating the surface of Fe with ...
Assemblies of polyvinylpyrrolidone-capped tetrahedral and spherical Pt nanoparticles in polyelectrolytes: Hydrogen underpotential deposition and electrochemical characterization

Jaber S.; Nasr P.; Xin Y.; Sleem F.; Halaoui L.I. (CAMBRIDGETHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND, 2013)

Polyvinylpyrrolidone (PVP)-capped Pt nanoparticles (NPs) were synthesized in mostly tetrahedral (TH-Pt, 〈edge〉 = 4.3 ± 0.7 nm) or spherical (S-Pt, 〈d〉 = 3.4 ± 0.8 nm) shapes and assembled layer-by-layer in poly(diallyldi ...
Assemblies of semiconductor and metal nanoparticles for renewable energy

Markarian M.Z.; El-Harakeh M.; Makki R.; Halaoui L.I. (, 2004)

Nanostructured electrodes were assembled layer-by-layer from polyacrylate-capped Pt nanoparticles (d=2.5 ± 0.6 nm) in a cationic polyelectrolyte. Cyclic voltammetry revealed hydrogen adsorption peaks at the modified ...
Assessment of bimetallic and trimetallic iron-based systems for persulfate activation: Application to sulfamethoxazole degradation

Ayoub G.; Ghauch A. (Elsevier; LAUSANNEPO BOX 564, 1001 LAUSANNE, SWITZERLAND, 2014)

This work investigated the potential of different iron-based systems to activate persulfate (PS) into sulfate radicals (SRs) through catalytic electron transfer. SRs were then used to degrade sulfamethoxazole (SMX) in ...
Atmospheric markers of African and Arabian dust in an urban eastern Mediterranean environment, Beirut, Lebanon

Dada L.; Mrad R.; Siffert S.; Saliba N.A. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND, 2013)

Long range transport of dust originating from Arabian and African Deserts causes the transformations in the morphology and chemical composition of aerosols. Changes result from physical and chemical reactions occurring in ...
Band propagation, scaling laws and phase transition in a precipitate system. i: Experimental study

Al-Ghoul M.; Ammar M.; Al-Kaysi R.O. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2012)

In the first part of this work, we present an experimental study of the precipitation-redissolution reaction-diffusion system of initially separated components in two distinct organic gels: agar and gelatin. The system is ...
Band, target, and onion patterns in Co(OH)2 Liesegang systems

Badr L.; Moussa Z.; Hariri A.; Sultan R. (COLLEGE PKONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA, 2011)

The study of morphology and shape development has gained considerable interest in certain sciences, notably biology and geology. Liesegang experiments producing Co(OH)2 stratification are performed here, in one, two, and ...
Bioactivity of origanum syriacum essential oil against candida albicans

Kassaify Z.; Gerges D.D.; Jaber L.S.; Hamadeh S.K.; Aoun Saliba N.; Talhouk S.N.; Barbour E.K. (, 2008)

The susceptibility of 14 human isolates of Candida albicans to commercially available vaginal douche materials and to the essential oil of Origanum syriacum was investigated in hamsters. The essential oil of O. syriacum ...
Bis(carbazolyl) derivatives of pyrene and tetrahydropyrene: Synthesis, structures, optical properties, electrochemistry, and electroluminescence

Kaafarani B.R.; El-Ballouli A.O.; Trattnig R.; Fonari A.; Sax S.; Wex B.; Risko C.; Khnayzer R.S.; Barlow S.; Patra D.; Timofeeva T.V.; List E.J.W.; Bredas J.-L.; Marder S.R. (CAMBRIDGETHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND, 2013)

Tetrahydropyrene and pyrene have been functionalized in their 2,7-positions with carbazole and 3,6-di-tert-butylcarbazole groups, and the properties of these new compounds are compared to analogous carbazole and 3,6-di-tert- ...
Calculation of dramatic differences in the activation energy of phenyl migratory insertion in the isomers of [Rh(PMe3)2Cl(CO)(Ph) H]: Important effects from both the ligand trans to Ph and the ligand trans to CO

Hasanayn F.; Abu-El-ez D. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2010)

Trans, trans-[RhL2(Ph)(CO)HCl] (2a) and trans, trans-[RhL 2(Ph)Cl(CO)H] (2b) are known to form as major products in the reaction between benzene and a photoexcited state of trans-[RhL 2(CO)Cl] (1; L = PMe3). In the presence ...
Calculations on the kinetics, thermodynamics, and selectivity of methyl radical addition to olefins coordinated to d8 and d0 transition-metal fragments: Two distinct and opposite anti-evans-polanyi effects with potential practical implications

Hasanayn F.; Gozem S. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2008)

DFT calculations predict that methyl radical addition to the propene and isobutene adducts of the [Rh(PCP)] and [(Cp)2Zr(OtBu)] + fragments affords different kinetic and thermodynamic products. The regioselectivity in the ...
Catalytic degradation of chlorothalonil in water using bimetallic iron-based systems.

Ghauch A.; Tuqan A. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2008)

Modified zero valent iron (MZVI) was used to study the transformation of a chlorothalonil (CLT) solution and the variation of the observed degradation rate of the reduction reactions. This was carried out when transition ...

Now showing items 21-40 of 244

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Browsing Department of Chemistry - Faculty Publications by Title

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