Browsing Department of Chemistry by Title

Now showing items 276-295 of 357

Salt and bile salt accelerate self-assembly behavior of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) probed by curcumin fluorescence

Bechnak, Linda; Patra, Digambara (Elsevier B.V., 2019)

Understanding self-assembly aspects of block copolymers is of great importance due to their utility in a wide range of applications whether in chemistry, pharmacy, or medicine. In this work, properties of poly(ethylene ...
Seawater analysis by ambient mass-spectrometry-based seaomics

Zabalegui, Nicolás; Manzi, Malena; Depoorter, Antoine; Hayeck, Nathalie; Roveretto, Marie; Li, Chunlin; van Pinxteren, Manuela Schellin; Herrmann, Hartmut; George, Christian; Monge, María Eugenia (Copernicus GmbH, 2020)

An analytical method coupled to multivariate statistical analysis was developed based on transmissionmode direct analysis in real-time quadrupole time-of-flight mass spectrometry (TM-DART-QTOF-MS) to interrogate lipophilic ...
Selective and sensitive turn on fluorescence cyanide recognition in aqueous medium based on Zn(II)–hydrazone metal complex chemosensor

Bouhadir, Kamal Hani; Elaridi, Jomana; Sonji, Ghassan M. (John Wiley and Sons Ltd, 2021)

Detection and quantification of the cyanide ion (CN−) has attracted considerable attention because of its extreme toxicity. A novel Zn(II)-complex, applicable as a fluorescent chemosensor for CN− recognition, was synthesized ...
Selective Detection of Silver Ions Based on Resonance Rayleigh Scattering Spectrometry Using Colloidal Silica Nanoparticles

Dagher, Justine; El-Kurdi, Riham; Patra, Digambara (Springer, 2022)

Colloidal silica or silicon dioxide nanoparticles (SiO2 NPs) are extremely amorphous nanomaterials owing spherical shape. These nanoparticles have gained much interest due to their usage in various fields; going from the ...
Selective Photocatalytic Dehydrogenation of Formic Acid by an in Situ-Restructured Copper-Postmetalated Metal-Organic Framework under Visible Light

Issa Hamoud, Houeida; Damacet, Patrick; Fan, Dong; Assaad, Nisrine; Lebedev, Oleg I.; Krystianiak, Anna; Gouda, Abdelaziz M.; Heintz, Olivier; Daturi, Marco; Maurin, Guillaume T.; Hmadeh, Mohamad; El-Roz, Mohamad (American Chemical Society, 2022)

Formic acid is considered as one of the most promising liquid organic hydrogen carriers. Its catalytic dehydrogenation process generally suffers from low activity, low reaction selectivity, low stability of the catalysts, ...
Selective resonance Rayleigh scattering spectroscopic determination of persulfate using cetyl trimethylammonium bromide capped cuo nanograins

Qasem, Mayada; El-Kurdi, Riham; Patra, Digambara (Elsevier Inc., 2020)

The authors were able successfully to produce uniform copper oxide nanograins (CuO NGs) using cetyl trimethylammonium bromide as capping agent. These nanograins were developed to design a new nanoprobe that will be able ...
Self-assembled lanthanum hydroxide microspheres within a reaction-diffusion framework: Synthesis, characterization, control and application

Al Akhrass, Ghida A.; Ammar, Manal; El-Rassy, Houssam; Al-Ghoul, Mazen (Royal Society of Chemistry, 2016)

We present the synthesis of spherical microparticles by self-assembly of lanthanum hydroxide nanoplatelets in a reaction-diffusion framework, which consists of diffusing an outer ammonia solution into a hydrogel matrix ...
Self-Assembly of Board-Shaped Diketopyrrolopyrrole and Isoindigo Mesogens into Columnar π-π Stacks

Taing, Hi; Cassar, Adam Michael; Ocheje, Michael Udunyi; Rondeau-Gagné, Simon; El-Assaad, Tarek H.; Sharabati, Christa A.; Kaafarani, Bilal R.; Eichhorn, S. Holger (Wiley-VCH Verlag, 2019)

Diketopyrrolopyrrole and isoindigo are commercially important dyes that have recently found broad application as electron acceptor and light-absorbing groups in organic semiconductors. Their self-assembly into specific ...
Silver-Modified Cross-Linked Polyvinylpyrrolidone and Its Antibacterial Activity

Kobeissi, Jana M.; Hassan, Ghandi F.; Karam, Pierre (American Chemical Society, 2018)

There is an increasing need to develop new antibacterial materials for treating contaminated potable water, particularly for addressing increasing bacterial resistance, which is predicted to be a major threat to human ...
Simulation of geochemical banding I: Acidization-precipitation experiments in a ferruginous limestone rock

Msharrafieh, Maysam; Al-Ghoul, Mazen; Zaknoun, Farah I.; El-Rassy, Houssam; El-Joubeily, Samia; Sultan, Rabih F. (Elsevier B.V., 2016)

This paper is the first among two articles which aim at exploring the possible similarities between the wellknown Liesegang banding phenomenon in precipitate systems, and the stripe formation observed in a large number of ...
Simulation of geochemical banding: Theoretical modeling and fractal structure in acidization-diffusion-precipitation dynamics

Al-Ghoul, Mazen; Sultan, Rabih F. (American Physical Society, 2019)

In an earlier work, we presented an experimental study wherein reaction-transport processes were forged in a real rock medium. Zonation of CaSO4-rich and CaSO4-depleted domains were obtained and characterized. In the present ...
Solid-State Green Synthesis of Ag NPs: Higher Temperature Harvests Larger Ag NPs but Smaller Size Has Better Catalytic Reduction Reaction

Al-Namil, Dina Sadeq; Khoury, Elsy El; Patra, Digambara (Nature Publishing Group, 2019)

In this work a novel solid-state green approach without using any solvent environment has been proposed to synthesize Ag NPs. The synthetic condition has been investigated in 4 °C, 20 °C, 40 °C and 60 °C and at ten different ...
Spectroscopic characterization of the structural properties of quinoxalinophenanthrophenazine thin films

Fra̧tczak, Ewelina Z.; Makowski, Tomasz; Moustafa, Rasha M.; El-Assaad, Tarek H.; Moneta, Marek E.; Uznański, Pawel; Kaafarani, Bilal R. (Royal Society of Chemistry, 2018)

Thin films of 2,11-bis(1,1-dimethylethyl)-6,7,15,16-tetramethylquinoxalino[2′,3′:9,10]phenanthro[4,5-abc]phenazine (TQPP-Me) and its long chain alkoxy derivative 2,11-bis(1,1-dimethylethyl)-6,7,15,16-tetrakis(dodecyloxy) ...
Spectroscopic Evaluation of Novel Adenine/Thymine-Conjugated Naphthalenediimides: Preference of Adenine-Adenine over Thymine-Thymine Intermolecular Hydrogen Bonding in Adenine- and Thymine-Functionalized Naphthalenediimides

Patra, Digambara; Al Homsi, Nadine; Jaafar, Sara; Neouchy, Zeina; Elaridi, Jomana; Koubeissi, Ali; Bouhadir, Kamal Hani (Springer New York LLC, 2019)

The synthesis and spectroscopic characterization of novel nucleobase (adenine/thymine)-conjugated naphthalenediimides (NDIs), namely, NDI-AA, NDI-TT, and NDI-AT have been successfully achieved. NDI-AA, NDI-TT and NDI-AT ...
Stability and particle size control of self-assembled cadmium-aluminum layered double hydroxide

Saliba, Daniel; Al-Ghoul, Mazen (Royal Society of Chemistry, 2016)

We use the reaction-diffusion framework (RDF) to study the kinetics of formation of hierarchical microstructures of cadmium-aluminum layered double hydroxide (CdAlCl LDH), its particle size distribution, and its polymorphic ...
Structural engineering of Zr-based metal-organic framework catalysts for optimized biofuel additives production

Jrad, Asmaa; Hmadeh, Mohamad; Abu Tarboush, Belal J.; Awada, Ghadir; Ahmad, Mohammad N. (Elsevier B.V., 2020)

This study reports the first investigation of the systematic introduction of defects in functionalized UiO-66 structures and its effect on their catalytic activities. Indeed, fifteen UiO-66-based MOFs were synthesized and ...
Structural, thermo-optical, and photophysical properties of highly oriented thin films of quinoxalinophenanthrophenazine derivative

Makowski, Tomasz; Moustafa, Rasha M.; Uznański, Pawel; Zaja̧czkowski, Wojciech; Pisula, Wojciech; Tracz, Adam; Kaafarani, Bilal R. (American Chemical Society, 2014)

The structural, thermo-optical, and anisotropic photophysical properties of highly oriented thin solid films of 2,11-bis(1,1-dimethylethyl)-6,7,15,16- tetrakis(dodecyloxy)quinoxalino[2′,3′:9,10]phenanthro[4,5-abc] phenazine ...
Structures of selected transition metal complexes with 9-(2-hydroxyethyl)adenine: Potentiometric complexation and DFT studies

Hammud, Hassan Hasan; Holman, Kevin Travis; Al-Noaimi, Mousa Z.; Sheikh, Nadeem S.; Ghannoum, Amer Mohammed; Bouhadir, Kamal Hani; Masoud, Mamdouh Saad; Karnati, Ranjith Kumar (Elsevier B.V., 2020)

The dissociation constants of ligand 9-(2-hydroxyethyl)adenine (9-HOEtAde) and the molecular property stability constant (Kf1) of ML complex has been potentiometrically determined with different media and temperatures. ...
Superdiffusive cusp-like waves in the mercuric iodide precipitate system and their transition to regular reaction bands

Ayass, Mahmoud M.; Al-Ghoul, Mazen (American Chemical Society, 2014)

We report a two-dimensional (2D) reaction-diffusion system that exhibits a superdiffusive propagating wave with anomalous cusp-like contours. This wave results from a leading precipitation reaction (wavefront) and a trailing ...
Surface and structural studies in a PbCrO4 Liesegang pattern with revert spacing

Ezzeddine, Dalia; El-Rassy, Houssam; Sultan, Rabih F. (Elsevier B.V., 2019)

We present a novel study of a PbCrO4 Liesegang pattern exhibiting revert spacing. Scanning Electron Microscopy (SEM), Atomic Absorption Spectrometry (AAS) and Energy Dispersive X-ray (EDX) spectroscopy measurements are ...

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