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Now showing items 205-224 of 244

Synchronous fluorescence spectroscopic study of solvatochromic curcumin dye

Patra D.; Barakat C. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2011)

Curcumin, the main yellow bioactive component of turmeric, has recently acquired attention by chemists due its wide range of potential biological applications as an antioxidant, an anti-inflammatory, and an anti-carcinogenic ...
Syntheses of 4-[(1H,3H)-pyrimidine-2,4-dion-1-yl]- and 4-[(1H,3H)-5- methylpyrimidine-2,4-dion-1-yl]-1,6-heptadienes

Bouhadir K.H.; Zhou J.-L.; Shevlin P.B. (PHILADELPHIA325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA, 2005)

Heptadienes containing nucleic bases are attractive building blocks for the synthesis of carbocyclic oligonucleotide analogs. Herein, we report an alternative synthetic route to 4-[(1H,3H)-pyrimidine-2,4-dion-1-yl]-1,6- ...
Synthesis and binding investigations of novel crown-ether derivatives of phenanthro[4,5- abc ]phenazine and quinoxalino[2′,3′:9,10] phenanthro[4,5- abc ]phenazine

Jradi F.M.; El-Ballouli A.O.; Al-Sayah M.H.; Kaafarani B.R. (ABINGDON4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND, 2014)

The synthesis and binding investigation of novel crown-ether derivatives of phenanthro[4,5-abc]phenazine and quinoxalino[2′,3′:9,10] phenanthro[4,5-abc]phenazine sensors are reported. The binding studies of these sensors ...
Synthesis and characterization by FTIR spectroscopy of silica aerogels prepared using several Si(OR)4 and R′′Si(OR′)3 precursors

Al-Oweini R.; El-Rassy H. (AMSTERDAMPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2009)

We report the synthesis and Fourier Transform Infrared spectroscopy characterization results dealing with the surface modification of silica aerogels obtained via a two-step sol-gel process where various silicon precursors ...
Synthesis and Characterization of Mesoporous Hybrid Silica-Polyacrylamide Aerogels and Xerogels

Ramadan H.; Coradin T.; Masse S.; El-Rassy H. (DORDRECHTVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS, 2011)

We report the synthesis of highly porous hybrid silica-polyacrylamide aerogels where the inorganic network was obtained through the hydrolysis and poly-condensation of tetramethoxysilane via a two-step sol-gel process while ...
Synthesis and detailed photophysical studies of pyrene-based molecules substituted with extended chains

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

Applications of conjugated organic compounds in the field of electronics and optoelectronics and of pyrene derivatives as fluorescent probes are well established. The synthesis of the novel pyrene-based 2,11-di-tert- ...
Synthesis and metal-binding studies of a novel pyrene discotic

Jradi F.M.; Al-Sayah M.H.; Kaafarani B.R. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2008)

The synthesis of a novel bis-crown quinoxalino[2′,3′:9,10]phenanthro[4,5-abc]phenazine discotic and its binding properties to a series of alkali and alkaline-earth metals is reported. A schematic representation of the ...
Synthesis and photophysical properties of poly-(phenylenevinylene) dendrimers with a ruthenium tris-bipyridine core

Houjeiry T.I.; Ghaddar T.H. (AMSTERDAMPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2008)

The photophysical processes have been investigated in first, second and third generation dendrimers with poly-(phenylenevinylene) branches and a ruthenium tris-bipyridine core, RuDn (n = 1-3). These dendrimers show very ...
Synthesis and photophysical properties of ruthenium-based dendrimers and their use in dye sensitized solar cells

Younes A.H.; Ghaddar T.H. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2008)

First- and second-generation dendrimers (Ru3 and Ru6) have been synthesized, and their photophysical properties were investigated in solution and when adsorbed on the nanocrystalline TiO2 surface. The performance of Ru3 ...
Synthesis and properties of some transition metal complexes of schiff base derived from the condensation of 2,6-pyridinedicarboxaldehyde and 8-aminoquinoline

Tayim H.A.; Salameh A.S. (, 2007)

The Schiff base derived from the condensation of 8-aminoquinoline and 2,6-pyridinedicarboxaldehyde has been synthesized by two routes. Direct reaction of the amine and the dialdehyde lead to the formation of the Schiff ...
Synthesis and: In vitro cytotoxicity evaluation of ruthenium polypyridyl-sensitized paramagnetic titania nanoparticles for photodynamic therapy

Sakr, M.H.; Halabi, N.M.; Kalash, L.N.; Al-Ghadban, S.I.; Rammah, M.K.; El Sabban, M.E.; Bouhadir, K.H.; Ghaddar, T.H. (Royal Society of Chemistry, 2016)

Following hydrothermal treatment of the final nanocomposites, a ruthenium polypyridyl dye was anchored to the surface. The total potential reactive oxygen species (ROS) generation and singlet oxygen (1O2) production in ...
Synthesis of a library of 2-alkyl-3-alkyloxy-2H-indazole-6-carboxamides

Mills A.D.; Maloney P.; Hassanein E.; Haddadin M.J.; Kurth M.J. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2007)

A library of 200 2-alkyl-3-alkyloxy-2H-indazole-6-carboxamides was synthesized using parallel solution-phase methods. The indazole cyclization reaction was optimized for library production with the best yields resulting ...
Synthesis of novel pyrene discotics for potential electronic applications

Kaafarani B.R.; Lucas L.A.; Wex B.; Jabbour G.E. (OXFORDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2007)

Novel pyrene discotics, 6,7,15,16-tetrakis(alkylthio)quinoxalino[2′,3′:9,10]phenanthro[4,5-abc]phenazines, TQPP-[SR]4, were synthesized efficiently. The HOMO and LUMO energy levels of TQPP-[SR]4 were estimated to be 5.57 ...
Synthesis of the anti and syn isomers of thieno[f,f′]bis[1] benzothiophene. Comparison of the optical and electrochemical properties of the anti and syn isomers

Wex B.; Kaafarani B.R.; Kirschbaum K.; Neckers D.C. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2005)

We report isomer-pure synthesis of thieno[2,3-f:5,4-f′]bis-[1] benzothiophene and thieno[3,2-f:4,5-f′]bis[1]benzothiophene, the anti and syn isomers of a pentacyclic compound consisting of alternating thiophene and benzene ...
Synthesis, cyclopolymerization and cyclo-copolymerization of 9-(2-Diallylaminoethyl)adenine and Its Hydrochloride Salt

Bouhadir K.H.; Abramian L.; Ezzeddine A.; Usher K.; Vladimirov N. (BASELPOSTFACH, CH-4005 BASEL, SWITZERLAND, 2012)

We report herein the synthesis and characterization of 9-(2- diallylaminoethyl) adenine. We evaluated two different synthetic routes starting with adenine where the optimal route was achieved through coupling of ...
Synthesis, ionisation potentials and electron affinities of hexaazatrinaphthylene derivatives

Barlow S.; Zhang Q.; Kaafarani B.R.; Risko C.; Amy F.; Chan C.K.; Domercq B.; Starikova Z.A.; Antipin M.Yu.; Timofeeva T.V.; Kippelen B.; Bredas J.-L.; Kahn A.; Marder S.R. (, 2007)

Several hexaazatrinaphthylene derivatives and a tris-(thieno) hexaazatriphenylene derivative have been synthesised by reaction of the appropriate diamines with hexaketocyclohexane. The crystal structure of 2,3,8,9,14,15- ...
Taming ring morphology in 2D Co(OH)2 Liesegang patterns

Shreif Z.; Mandalian L.; Abi-Haydar A.; Sultan R. (, 2004)

We present here novel expermients on the formation of Liesegang rings in 2D. We consider the system of propagating Co(OH)2 bands studied extensively in 1D, from the viewpoint of a large number of considerations. In this ...
The davis-beirut reaction: A novel entry into 2h-indazoles and indazolones. Recent biological activity of indazoles

Haddadin M.J.; Conrad W.E.; Kurth M.J. (SHARJAHEXECUTIVE STE Y-2, PO BOX 7917, SAIF ZONE, 1200 BR SHARJAH, U ARAB EMIRATES, 2012)

A novel, easy method for the syntheses of richly diversified 2H-indazoles and indazolones, called the Davis-Beirut reaction, and other recent 2H-indazole synthetic routes are briefly reviewed. An update on the biological ...
The Davis-Beirut reaction: N 1, N 2-disubstituted-1 H-indazolones via 1,6-electrophilic addition to 3-alkoxy-2 H-indazoles

Conrad W.E.; Fukazawa R.; Haddadin M.J.; Kurth M.J. (WASHINGTON1155 16TH ST, NW, WASHINGTON, DC 20036 USA, 2011)

A variety of electrophiles (anhydrides, acid chlorides, carbonochloridates, sulfonyl chlorides, and alkyl bromides) react with 3-methoxy-2H-indazole (1a), benzoxazin[3,2-b]indazole (1d), and oxazolino[3,2-b]indazole (1e) ...
The quinoxaline di-N-oxide DCQ blocks breast cancer metastasis in vitro and in vivo by targeting the hypoxia inducible factor-1 pathway

Ghattass K.; El-Sitt S.; Zibara K.; Rayes S.; Haddadin M.J.; El-Sabban M.; Gali-Muhtasib H. (LONDON236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND, 2014)

Background: Although tumor hypoxia poses challenges against conventional cancer treatments, it provides a therapeutic target for hypoxia-activated drugs. Here, we studied the effect of the hypoxia-activated synthetic ...

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Browsing Department of Chemistry - Faculty Publications by Title

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