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Now showing items 78-97 of 244

Eco-Friendly Aqueous Dye-Sensitized Solar Cell with a Copper(I/II) Electrolyte System: Efficient Performance under Ambient Light Conditions

Jilakian, M.; Ghaddar, T.H. (American Chemical Society, 2022)

Organic solvents used in electrolytes of dye-sensitized solar cells (DSCs) are generally toxic and not environmentally safe, which renders their use, especially in indoor solar modules, difficult. In this paper, an ...
Effect of an alternating current electric field on Co(OH)2 periodic precipitation

Karam T.; Sultan R. (AMSTERDAMPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2013)

The present paper studies the effect of an alternating current (AC) electric field on Co(OH)2 Liesegang patterns. In the presence of an AC electric field, the band spacing increases with spacing number, but reaches a plateau ...
Effect of chain length on the photophysical properties of pyrene-based molecules substituted with extended chains

Degheili J.A.; Moustafa R.M.; Patra D.; Kaafarani B.R. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2009)

The important role played by organic conjugated compounds in the ?elds of electronics and optoelectronics has led to a vast ?eld of research concerned with synthesizing various complex structures where π-π stacking plays ...
Effect of curcumin on liposome: Curcumin as a molecular probe for monitoring interaction of ionic liquids with 1,2-dipalmitoyl-sn-glycero-3- phosphocholine liposome

Patra D.; El Khoury E.; Ahmadieh D.; Darwish S.; Tafech R.M. (HOBOKEN111 RIVER ST, HOBOKEN 07030-5774, NJ USA, 2012)

Recent increase and wider use of ionic liquids (ILs) for various applications has drawn attention to their toxicological consequence on human health. The present study explores effects of three different kinds of widely ...
The effect of different ester chain modifications of two guaianolides for inhibition of colorectal cancer cell growth

Aaraj, L.A.; Hayar, B.; Jaber, Z.; Saad, W.; Saliba, N.A.; Darwiche, N.; Ghaddar, T. (MDPI, 2021)

Several sesquiterpene lactones (STLs) have been tested as lead drugs in cancer clinical trials. Salograviolide-A (Sal-A) and salograviolide-B (Sal-B) are two STLs that have been isolated from Centaurea ainetensis, an ...
Effect of hydroxyl radicals on the interaction between chlorinated volatile organic compounds and β-pinene under simulated and sunlight irradiation

Ghauch A.; Kaluzny P.; Rouviere A.; Deveau P.-A.; Baussand P. (, 2006)

Experiments are performed in atmospheric simulation chambers. First, reactions are carried out in a rigid ASC under simulated irradiation where different gaseous systems (OH• - TCE and MC - β-pinene) are studied in mixtures ...
Effect of local and long-range transport emissions on the elemental composition of PM10-2.5 and PM2.5 in Beirut

Saliba N.A.; Kouyoumdjian H.; Roumie M. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2007)

The elemental composition of PM10-2.5 and PM2.5 were studied in winter, summer, stormy and non-stormy dates during a period extending from February 2004 till January 2005, in a populated area of Beirut. Results of PIXE ...
Effects of hydrogen exposure temperature on the tensile strength, microhardness and ductility of Pd-Ag (25 wt.percent) alloy

Dahlmeyer J.; Garrison T.; Garrison T.; Darkey S.; Massicotte F.; Rebeiz K.; Nesbit S.; Craft A. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2011)

A study into the effects of hydrogen absorption followed by complete desorption by the alloy palladium-silver (25 wt.percent) has been carried out over the temperature range of 303-473 K. The results indicate that at all ...
Efficient syntheses of the unknown quinolino[2,3- c ]cinnolines; Synthesis of neocryptolepines

Haddadin M.J.; Zerdan R.M.B.; Kurth M.J.; Fettinger J.C. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2010)

A facile, efficient, three-step protocol for the synthesis of the unknown quinolino[2,3-c]cinnoline 5 is introduced. In addition, a new approach for the preparation of the biologically active neocryptolepines 8 in good ...
Electrocatalytic activity at surface-modified Pt nanoparticles assembled in polyelectrolyte

Karam P.; Estephan Z.G.; El Harakeh M.; Houry M.; Halaoui L.I. (PENNINGTON65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA, 2006)

Assemblies of polyacrylate-capped Pt nanoparticles (〈d〉 =2.5±0.6 nm) in poly(diallyldimethylammonium chloride) are reported to be electrocatalytically active for key charge-transfer reactions, viz., hydrogen evolution, ...
Electrostatic layer-by-layer deposition of photoactive dendrimers with triviologen-like cores on their surfaces. Synthesis and electrochemical and photocurrent generation measurements

Boubbou K.H.; Ghaddar T.H. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2005)

The stepwise assembly of Fréchet-type dendrimers with naphthalene peripheral groups and positively charged viologen-like cores on quartz and ITO surfaces utilizing the layer-by-layer approach was investigated. We were able ...
End-capping of conjugated thiophene-benzene aromatic systems

Wex B.; Jradi F.M.; Patra D.; Kaafarani B.R. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2010)

The synthesis of end-capped thieno[3,2-f:4,5-f′]bis[1]benzothiophene was achieved from thiophene and 2,5-thiophenedicarboxaldehyde. Specifically, hexyl and dodecyl end-capping groups conferred reversible redox behavior as ...
Enhanced conversion of light at TiO2 photonic crystals to the blue of a stop band and at TiO2 random films sensitized with Q-CdS: Order and disorder

Harakeh M.E.; Halaoui L. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2010)

Significant enhancements in the conversion of light to current were observed at the blue edge of TiO2 inverse opals (i-TiO2-o) and at highly disordered TiO2 films (i-TiO2-d) sensitized with Q-CdS in sulfide electrolyte. ...
Enhanced solar energy conversion at quantum dot sensitized TiO2 photonic crystals and disordered films by slow light effects

Harakeh M.E.; Bayram S.; Jaber S.; Halaoui L. (, 2010)

Suppressed group velocity of light near the stop band edges of photonic crystals and multiple internal scattering in disordered films can be exploited to amplify light energy conversion by increasing photon transit time. ...
Enhanced solar energy conversion at quantum dot sensitized TiO2 photonic crystals and disordered films by slow light effects

Harakeh M.E.; Bayram S.; Jaber S.; Halaoui L. (, 2010)

Suppressed group velocity of light near the stop band edges of photonic crystals and multiple internal scattering in disordered films can be exploited to amplify light energy conversion by increasing photon transit time. ...
Enhancement of photocurrent in dye sensitized solar cells incorporating a cyclometalated ruthenium complex with cuprous iodide as an electrolyte additive

Kisserwan H.; Ghaddar T.H. (CAMBRIDGETHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND, 2011)

A new cyclometalated ruthenium complex, [Ru(6′-phenyl-4′- thiophen-2-yl-[2,2′]bipyridinyl-4-carboxylic acid)(4,4′, 4′′-tricarboxy- 2,2′:6′,2′′-terpyridine)]Cl, for Dye Sensitized Solar Cells (DSSCs) is proposed. We have ...
Enhancement of photocurrent in dye sensitized solar cells incorporating cyclometalated ruthenium complexes with CuI as an electrolyte additive: Electrochemical analysis under dark conditions

Ghaddar T. (, 2010)

Dye sensitized solar cells (DSSC's) have been the focus of research by many scientists due to their promising usage as alternative energy sources. We report here the fabrication of a DSC with a novel cyclometalated ruthenium ...
Enhancement of photocurrent in dye sensitized solar cells incorporating cyclometalated ruthenium complexes with CuI as an electrolyte additive: Electrochemical analysis under dark conditions

Ghaddar T. (, 2010)

Dye sensitized solar cells (DSSC's) have been the focus of research by many scientists due to their promising usage as alternative energy sources. We report here the fabrication of a DSC with a novel cyclometalated ruthenium ...
Enhancement of photovoltaic performance of a novel dye, t18, with ketene thioacetal groups as electron donors for high efficiency dye-sensitized solar cells

Kisserwan H.; Ghaddar T.H. (LAUSANNEPO BOX 564, 1001 LAUSANNE, SWITZERLAND, 2010)

A new ruthenium polypyridine sensitizer, T18, for Dye-Sensitized Solar Cells (DSSCs) is proposed containing an electron rich ketene thioacetal modified bipyridyl group as an ancillary ligand. The T18 dye, (cis-bis(thiocyanato)(2, ...
Experimental study of the dynamics of front propagation in the Co(OH) 2-NH4OH Liesegang system using spectrophotometry

Batlouni H.; Al-Ghoul M. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2008)

In this paper we study the temporal dynamics of the Co(OH) 2-NH4OH Liesegang system with redissolution by complex formation with ammonia using UV-vis spectrophotometry with a special setup. The formation of precipitate ...

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Browsing Department of Chemistry - Faculty Publications by Title

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