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Browsing Department of Chemistry - Faculty Publications by Title

Now showing items 111-130 of 244

Generalized hydrodynamics and microflows

Al-Ghoul M.; Eu B.C. (COLLEGE PKONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA, 2004)

A mathematical model was developed within the framework of generalized hydrodynamics for the description of flows in microsystems where the Knudsen number is largest and the aspect ratio is not so small. The model was based ...
Generalized hydrodynamics of reaction-diffusion systems and dissipative structures

Al-Ghoul M. (LONDON6 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND, 2004)

Generalized hydrodynamics (GH) are derived and used to describe a reaction-diffusion system. The derived GH equations are hyperbolic and are shown to be more general and more suitable than the conventional parabolic ...
High charge-carrier mobility in an amorphous hexaazatrinaphthylene derivative

Kaafarani B.R.; Kondo T.; Yu J.; Zhang Q.; Dattilo D.; Risko C.; Jones S.C.; Barlow S.; Domercq B.; Amy F.; Kahn A.; Bredas J.-L.; Kippelen B.; Marder S.R. (, 2005)

An isomeric mixture of a tris(pentafluorobenzyl ester) derivative of hexaazatrinaphthylene forms stable amorphous films with an effective charge-carrier mobility of 0.02 cm2-Vs, while the pure 2,8,15-isomer exhibits widely ...
High photo-currents with a zwitterionic thiocyanate-free dye in aqueous-based dye sensitized solar cells

Fayad, R.; Shoker, T.A.; Ghaddar, T.H. (Royal Society of Chemistry, 2016)

We report a new water soluble and stable thiolate/disulfide redox couple (T-/DS) and its use with a new zwitterionic and thiocyanate-free dye (T169) in a 100% aqueous electrolyte system. A DSSC incorporating T169 and the ...
Hydrogenation of dimethyl carbonate to methanol by trans -[Ru(H) 2(PNN)(CO)] catalysts: DFT evidence for ion-pair-mediated metathesis paths for C-OMe bond cleavage

Hasanayn F.; Baroudi A.; Bengali A.A.; Goldman A.S. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2013)

Milstein and co-workers have reported that the pincer complexes trans-[Ru(H)2(PNN)(CO)] catalyze the unprecedented homogeneous hydrogenation of dimethyl carbonate to methanol. A mechanism for this reaction was proposed on ...
Ibuprofen removal by heated persulfate in aqueous solution: A kinetics study

Ghauch A.; Tuqan A.M.; Kibbi N. (LAUSANNEPO BOX 564, 1001 LAUSANNE, SWITZERLAND, 2012)

Thermally activated persulfate (TAP) is discussed in the literature as remediation option for contaminated effluents. The present paper assesses the impact of selected operational parameters on the involved oxidative ...
Immobilized polyoxometalates onto mesoporous organically-modified silica aerogels as selective heterogeneous catalysts of anthracene oxidation

Al-Oweini R.; Aghyarian S.; El-Rassy H. (Kluwer Academic Publishers; DORDRECHTVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS, 2012)

Immobilized molybdovanadophosphoric acids onto organically surface-modified silica aerogels were successfully prepared and investigated in heterogeneous catalysis of anthracene oxidation. The catalysts were obtained by ...
Increased efficiency of dye sensitized solar cells through the localization of light

Abrams N.M.; Halaoui L.I.; Mallouk T.E. (, 2004)

The effects of tuning and scattering on the enhancement of conventional nanocrystalline TiO 2 dye sensitized solar cells were investigated when coupled to an inverse opal photonic crystal or disordered macroporous TiO 2 ...
Increasing the conversion efficiency of dye-sensitized TiO 2 photoelectrochemical cells by coupling to photonic crystals

Halaoui L.I.; Abrams N.M.; Mallouk T.E. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2005)

The mechanism of enhancing the light harvesting efficiency of dye-sensitized TiO 2 solar cells by coupling TiO 2 inverse opals or disordered scattering layers to conventional nanocrystalline TiO 2 films has been investigated. ...
Influence of substituent and solvent on the radiative process of singlet excited states of novel cyclic azacyanine derivatives

Patra D.; Malaeb N.N.; Haddadin M.J.; Kurth M.J. (NEW YORK233 SPRING ST, NEW YORK, NY 10013 USA, 2012)

The photophysical properties of novel cyclic azacyanine derivatives have been investigated in acetonitrile, N-butyronitrile, methanol, ethanol, DMF and water. Introduction of electron donating or accepting groups on the ...
Inhibition of proliferation and induction of apoptosis by 2-benzoyl-3-phenyl-6,7-dichloroquinoxaline 1,4-dioxide in adult T-cell leukemia cells

Harakeh S.; Diab-Assef M.; El-Sabban M.; Haddadin M.; Gali-Muhtasib H. (CLARECUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND, 2004)

Human T-cell lymphotrophic virus type-1 (HTLV-1) is a retrovirus which causes adult T-cell leukemia (ATL), an aggressive malignancy of activated T-cells. So far, there is no proven therapy for this disease. The compound ...
Investigating the mechanism of clofibric acid removal in Fe0-H2O systems

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

Since the introduction of iron wall technology, the inherent relationship between contaminant removal and iron corrosion has been mostly attributed to electron transfer from the metal body (direct reduction). This ...
Investigation of carbon nanotube webs as counter electrodes in a new organic electrolyte based dye sensitized solar cell

Noureldine D.; Shoker T.; Musameh M.; Ghaddar T.H. (CAMBRIDGETHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND, 2012)

A new organic electrolyte system composed of 1-methyl-3-propylimidazole-2- thione (T) and 2,2′-dithiobis(1-methyl-3-propyl-2-imidazolinium) ditriflate (DT) has been formulated and used in dye sensitized solar cells (DSSCs). ...
Ionic liquid expedites partition of curcumin into solid gel phase but discourages partition into liquid crystalline phase of 1,2-dimyristoyl-sn- glycero-3-phosphocholine liposomes

El Khoury E.D.; Patra D. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2013)

The hydrolysis of curcumin in alkaline and neutral buffer conditions is of interest because of the therapeutic applicability of curcumin. We show that hydrolysis of curcumin can be remarkably suppressed in 1,2-dimyristoyl-sn- ...
Isomer-pure synthesis and preparation of FET using thieno[f,f′]bis[1] benzothiophene (syn, anti)

Wex B.; Kaafarani B.R.; Schroeder R.; Majewski L.A.; Grell M.; Neckers D.C. (, 2005)

The field-effect mobility in two isomers of thieno[f,f′]bis[1] benzothiophene was studied as a function of structure. Both regioisomers exhibit substantial mobilities up to 0.12 cm-2-Vs, a value that is at most one order ...
Kinetics and mechanism of ionic intercalation-de-intercalation during the formation of α-cobalt hydroxide and its polymorphic transition to β-cobalt hydroxide: Reaction-diffusion framework

Rahbani J.; Khashab N.M.; Patra D.; Al-Ghoul M. (CAMBRIDGETHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND, 2012)

We study the kinetics and mechanism of intercalation and de-intercalation of small anions during the formation of crystalline α-Co(OH) 2 and its transformation to β-Co(OH) 2 within a reaction-diffusion framework. We therein ...
Large Enhancement of Dye Sensitized Solar Cell Efficiency by Co-sensitizing Pyridyl- and Carboxylic Acid-Based Dyes

Hilal, H.M.; El Bitar Nehme, M.A.; Ghaddar, T.H. (American Chemical Society, 2018)

Co-sensitization is an attractive approach to enhance the light-harvesting efficiency of a dye sensitized solar cell (DSSC), whereby two or more dyes having complementary absorption spectra are co-adsorbed within a DSSC. ...
Levels and indoor-outdoor relationships of PM10 and soluble inorganic ions in Beirut, Lebanon

Saliba N.A.; Atallah M.; Al-Kadamany G. (NEW YORK360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA, 2009)

PM10, which is considered among the major indoor and outdoor pollutants, was measured in several residential homes and corresponding outdoor environments in the Great Beirut area over the summer and winter seasons of 2005. ...
Liesegang banding and multiple precipitate formation in cobalt phosphate systems

Karam T.; El-Rassy H.; Zaknoun F.; Moussa Z.; Sultan R. (AMSTERDAMPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2012)

We study a cobalt phosphate Liesegang pattern from cobalt(II) and phosphate ions in a 1D tube. The system yields a complex, multi-component pattern. Characterization of the different precipitates by FTIR, SEM and XRD reveals ...
Mass concentration and ion composition of coarse and fine particles in an urban area in Beirut: Effect of calcium carbonate on the absorption of nitric and sulfuric acids and the depletion of chloride

Kouyoumdjian H.; Saliba N.A. (KATLENBURG-LINDAUMAX-PLANCK-STR 13, 37191 KATLENBURG-LINDAU, GERMANY, 2006)

Levels of coarse (PM10-2.5) and fine (PM2.5) particles were determined between February 2004 and January 2005 in the city of Beirut, Lebanon. While low PM mass concentrations were measured in the rainy season, elevated ...

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Browsing Department of Chemistry - Faculty Publications by Title

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