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Now showing items 1-20 of 244

1,2-Dioxepanes, 1,2-Oxathiepanes, and 1,2-Dithiepanes

Haddadin M.J.; Nachef C.J. (Elsevier Ltd., 2008)

[No abstract available]
2-Benzyliden-2H-thieto[3,2-b]quinoline: A new heterocycle and its rearrangement to 2-phenylthieno[3,2-b]quinoline

Haddadin M.J.; El-Nachef C.; Kisserwani H.; Chaaban Y.; Kurth M.J.; Fettinger J.C. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2010)

Synthesis of the strained 2H-thieto[3,2-b]quinoline ring system is reported for the first time. Treatment of (Z)-2-benzyliden-2H-thieto[3,2-b]quinoline derivatives of this heterocycle with base, at reflux in ethanol, causes ...
7-O-methylpunctatin, a novel homoisoflavonoid, inhibits phenotypic switch of human arteriolar smooth muscle cells

Fardoun, M.; Iratni, R.; Dehaini, H.; Eid, A.; Ghaddar, T.; El-Elimat, T.; Alali, F.; Badran, A.; Eid, A.H.; Baydoun, E. (MDPI AG, 2019)

Remodeling of arterioles is a pivotal event in the manifestation of many inflammation-based cardio-vasculopathologies, such as hypertension. During these remodeling events, vascular smooth muscle cells (VSMCs) switch from ...
A combined study of mesomorphism, optical, and electronic properties of donor-acceptor columnar liquid crystals

Eichhorn S.H.; Chen S.; Ahmida M.; Demenev A.; Kayal H.; Raad F.S.; Kaafarani B.R.; Patwardhan S.; Grozema F.C.; Siebbeles L.D.A.; Taerum T.; Perepichka D.F.; Klenkler R. (, 2011)

Donor-acceptor structures have recently gained great popularity for the design of low band gap polymeric organic semiconductors. Presented here is a first systematic study of organic semiconductors based on columnar liquid ...
A comparative study of charge mobility measurements in a diamine and in a hexaazatrinaphthylene using different techniques

Domercq B.; Yu J.; Kaafarani B.R.; Kondo T.; Yoo S.; Haddock J.N.; Barlow S.; Marder S.R.; Kippelen B. (, 2008)

A comparative study of hole-mobility in N,N'-diphenyl-N,N'-di(3- methylphenyl)-(1,1'-biphenyl)-4,4'-diamine (TPD) using three independent measurement techniques is presented. Time-of-flight (TOF), steady-state space ...
A computational study of the effect of bending on secondary kinetic isotope effects in SN2 transition states

Hasanayn F.; Streitwieser A.; Al-Rifai R. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2005)

Using conventional transition state theory, the secondary deuterium kinetic isotope effect (KIE) in the inversion SN2 reaction of CH 3F and F- is calculated to be small, 0.98 (T = 298 K). This is shown to be the result of ...
A facile synthesis of new 5H-indazolo[3,2-b]benzo[d]-1,3-oxazines via one-pot intramolecular bis-heterocyclizations

Butler J.D.; Solano D.M.; Robins L.I.; Haddadin M.J.; Kurth M.J. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2008)

(Chemical Equation Presented) The parent 5H-indazolo[3,2-b]benzo[d]-1,3- oxazine heterocycle as well as a series of novel analogues have been synthesized utilizing two subsequent intramolecular heterocyclizations in one ...
A metathesis model for the dehydrogenative coupling of amines with alcohols and esters into carboxamides by milsteins [Ru(PNN)(CO)(H)] catalysts

Hasanayn F.; Harb H. (American Chemical Society; WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2014)

Milsteins [Ru(PNN)(CO)(H)] catalyst (1-Ru) is known to mediate the dehydrogenative coupling of alcohols into esters. When it is used in alcohol-amine mixtures it catalyzes carboxamide formation selectively over esters and ...
A new method for pH triggered curcumin release by applying poly(l-lysine) mediated nanoparticle-congregation

Patra D.; Sleem F. (AMSTERDAMPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2013)

We introduce a novel method for encapsulation of curcumin by synthesizing microcapsule containing self-assembled nanoparticles using poly ( l-lysine), trisodium citrate and silica sol. Such microcapsules can only be prepared ...
A new ruthenium polypyridyl dye, TG6, whose performance in dye-sensitized solar cells is surprisingly close to that of N719, the 'dye to beat' for 17 years

Matar F.; Ghaddar T.H.; Walley K.; DosSantos T.; Durrant J.R.; O'Regan B. (CAMBRIDGETHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND, 2008)

A new ruthenium polypyridine sensitizer for dye-sensitized solar cells (DSSCs) is proposed containing a hexasulfanyl-styryl-modified bipyridyl group as an ancillary ligand. The advantages of this dye are the much larger ...
A novel method for the synthesis of 3,5-disubstituted-(NH)-1,2,4-triazoles from 3,6-diaryl-1,2,4,5-tetrazines

Haddadin M.J.; Ghazvini Zadeh E.H. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2010)

The reaction of 3,6-diaryl-1,2,4,5-tetrazines and 2-aryl substituted acetonitriles, under basic conditions, leads unexpectedly to 3,5-diaryl-(NH)-1,2,4-triazoles in moderate yields. A mechanism is proposed. © 2010 Elsevier ...
A novel route to fully substituted 1H-pyrazoles

Suen Y.F.; Hope H.; Nantz M.H.; Haddadin M.J.; Kurth M.J. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2005)

A novel one-step synthesis route to fully substituted pyrazol-4-ols is reported. This simple yet nonobvious method for the construction of pyrazol-4-ols by the condensation-fragmentation-cyclization-extrusion reactions of ...
A one-pot-three-step route to triazolotriazepinoindazolones from oxazolino-2H-indazoles

Conrad W.E.; Rodriguez K.X.; Nguyen H.H.; Fettinger J.C.; Haddadin M.J.; Kurth M.J. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2012)

A one-pot-three-step method has been developed for the conversion of oxazolino-2H-indazoles into triazolotriazepinoindazolones with three points of diversity. Step one of this process involves a propargyl bromide-initiated ...
Ab initio calculation of the low-lying electronic states of the ZrN molecule

Farhat A.; Korek M.; Marques M.A.L.; Abdul-Al S.N. (, 2012)

An ab initio calculation of the low-lying electronic states of zirconium nitride (ZrN) were performed by using a complete active space self-consistent field with multireference single and double excitation configuration ...
Acid and base catalyzed Davis-Beirut reaction: Experimental and theoretical mechanistic studies and synthesis of novel 3-amino-2H-indazoles

Avila B.; El-Dakdouki M.H.; Nazer M.Z.; Harrison J.G.; Tantillo D.J.; Haddadin M.J.; Kurth M.J. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2012)

The Davis-Beirut reaction, which provides an efficient synthesis of 2H-indazoles and, subsequently, indazolones, is shown to proceed rapidly from o-nitrosobenzaldehyde and primary amines under both acid and base catalysis. ...
Acridine orange and silica nanoparticles facilitated novel robust fluorescent hollow microcapsules toward DNA bio-sensor

Patra D.; Sleem F. (AMSTERDAMPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2014)

Tuning optical properties by nanotechnology has become a topic of larger interest as these materials can be of extraordinary sensitivity, selectivity and robustness toward sensing applications. Here we report novel fluorescent ...
Active Pt nanoparticles stabilized with glucose oxidase

Karam P.; Xin Y.; Jaber S.; Halaoui L.I. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2008)

We report the growth of Pt nanoparticles (NP) coupled and stabilized in situ with glucose oxidase (GOx). The enzyme-capped-Pt nanoparticles were formed from K2PtCl6 (aq) reduced with H2 (g) in the presence of GOx at a molar ...
Active scaffolds for on-demand drug and cell delivery

Zhao X.; Kim J.; Cezar C.A.; Huebsch N.; Lee K.; Bouhadir K.; Mooney D.J. (WASHINGTON2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA, 2011)

Porous biomaterials have been widely used as scaffolds in tissue engineering and cell-based therapies. The release of biological agents from conventional porous scaffolds is typically governed by molecular diffusion, ...
Addition of alkyl radicals to transition-metal-coordinated CO: Calculation of the reaction of [Ru(CO)5] and related complexes and relevance to alkane carbonylation

Hasanayn F.; Nsouli N.H.; Al-Ayoubi A.; Goldman A.S. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2008)

Electronic structure methods have been used to study the transition state and products of the reaction between alkyl radicals and CO coordinated in transition-metal complexes. At the B3LYP DFT level, methyl addition to a ...
Adsorption kinetics and thermodynamics of azo-dye Orange II onto highly porous titania aerogel

Abramian L.; El-Rassy H. (LAUSANNEPO BOX 564, 1001 LAUSANNE, SWITZERLAND, 2009)

We report herein a kinetic and thermodynamic study of the adsorption of azo-dye Orange II from aqueous solutions onto titania aerogels. Aerogels structure was confirmed by FTIR and N 2 adsorption revealed their specific ...

Now showing items 1-20 of 244

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Browsing Department of Chemistry - Faculty Publications by Title

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