Browsing Department of Chemistry by Title

Now showing items 188-207 of 357

Kinetic Modeling of the Pyrolysis of Propylene Glycol

Al Gemayel, Christina; Honein, Edward; El-Hellani, Ahmad; Salman, Rola; Saliba, Najat A.; Shihadeh, Alan Louis; Zeaiter, Joseph (Engineered Science Publisher, 2022)

A kinetic model was developed to predict product evolution during the thermal degradation of propylene glycol (PG) under N2 atmosphere. Main aldehydes that form from PG pyrolysis are formaldehyde (FA), acetaldehyde (AA), ...
Lanthanides based metal organic frameworks for luminescence sensing of toxic metal ions

Mahmoud, Mahmoud Elcheikh; Moussa, Zeinab; Prakasam, Thirumurugan; Li, Liang; Abiad, Mohamad G.; Patra, Digambara; Hmadeh, Mohamad (Academic Press Inc., 2020)

Two set of lanthanides-based metal organic framework structures incorporating 2,6-naphthalenedicarboxylic acids and 1,5 dihydroxy-2,6-naphthalenedicarboxylic have been successfully synthesized and fully characterized. ...
Laparoscopic Excision of an Unusual Presentation of a Nabothian Cyst: Case Report and Review of the Literature

Nassif, Joseph A.; Nahouli, Hasan; Mourad, Ali; Yammine, Ryan; Khoury, Sally; Khalil, Ali M. (2017)

Nabothian cysts are mucinous retention cysts formed through the accumulation of cervical mucus inside blocked cervical crypts leading to non-neoplastic mucinous cystic lesion in relation to the uterine cervix. The formation ...
Large Enhancement of Dye Sensitized Solar Cell Efficiency by Co-sensitizing Pyridyl- and Carboxylic Acid-Based Dyes

Hilal, Hamsa M.; El Bitar Nehme, Mélissa A.; Ghaddar, Tarek 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. ...
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. ...
Lateral extension induces columnar mesomorphism in crucifix shaped quinoxalinophenanthrophenazines This paper is dedicated to Professor Makhlouf J. Haddadin on the occasion of his 80th birthday and 50 years of outstanding service to the American University of Beirut

El-Ballouli, A. O.; Kayal, Himadri; Shuai, Chen; Zeidan, Tarek A.; Raad, Farah S.; Leng, Siwei; Wex, Brigitte; Cheng, Stephen Z.D.; Eichhorn, S. Holger; Kaafarani, Bilal R. (Elsevier Ltd, 2015)

Reported here is the columnar mesomorphism of board shaped dyes based on quinoxalino[2′,3′:9,10]phenanthro[4,5-abc]phenazine (TQPP) derivatives that was induced by an increase in lateral bulk. TQPP derivatives with protons, ...
Length of hydrocarbon chain influences location of curcumin in liposomes: Curcumin as a molecular probe to study ethanol induced interdigitation of liposomes

El Khoury, Elsy D.; Patra, Digambara (Elsevier B.V., 2016)

Using fluorescence quenching of curcumin in 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) liposomes by brominated derivatives of fatty acids, the location of ...
Lessons learned from the discovery and development of the sesquiterpene lactones in cancer therapy and prevention

Cheikh, Israa Ahmad; el-Baba, Chirine Omar; Youssef, Ali; Saliba, Najat A.; Ghantous, Akram Y.; Darwiche, Nadine D. (Taylor and Francis Ltd., 2022)

Introduction: Sesquiterpene lactones (SLs) are one of the most diverse bioactive secondary metabolites found in plants and exhibit a broad range of therapeutic properties. SLs have been showing promising potential in cancer ...
Lewis Structures and the Bonding Classification of End-on Bridging Dinitrogen Transition Metal Complexes

Hasanayn, Faraj; Holland, Patrick L.; Goldman, Alan S.; Miller, Alexander J.M. (American Chemical Society, 2023)

The activation of dinitrogen by coordination to transition metal ions is a widely used and promising approach to the utilization of Earth’s most abundant nitrogen source for chemical synthesis. End-on bridging N2 complexes ...
Liesegang Banding for Controlled Size and Growth of Zeolitic-Imidazolate Frameworks

Zakhia Douaihy, Rita; Al-Ghoul, Mazen; Hmadeh, Mohamad (Wiley-VCH Verlag, 2019)

Here, the formation of periodic precipitation (Liesegang bands) from hybrid (organic–inorganic) components is reported, namely ZIF-8, ZIF-67, and their mixed metal derivatives. The spacing and width laws that characterize ...
Liesegang bands versus random crystallites in Ag2Cr2O7 – Single and mixed gelled media

Ibrahim, Huria; El-Rassy, Houssam; Sultan, Rabih F. (Elsevier B.V., 2018)

Liesegang patterns of silver dichromate (Ag2Cr2O7) are studied in two different gel media: agar and gelatin, based on the work of Lagzi and Ueyama (2009). Whereas in gelatin, standard Liesegang bands are obtained as a ...
Liposome-based nanocapsules for the controlled release of dietary curcumin: PDDA and silica nanoparticle-coated DMPC liposomes enhance the fluorescence efficiency and anticancer activity of curcumin

Othman, Alaa K.; El-Kurdi, Riham; Badran, Adnan; Mesmar, Joelle Edward; Baydoun, Elias Abdel Hasan; Patra, Digambara (Royal Society of Chemistry, 2022)

Nanosystems with various compositions and biological properties are being extensively investigated for drug and gene delivery applications. Many nanotechnology methods use novel nanocarriers, such as liposomes, in ...
Localized catalysis driven by the induction heating of magnetic nanoparticles

Yassine, Sarah R.; Fatfat, Zaynab; Darwish, Ghinwa H.; Karam, Pierre (Royal Society of Chemistry, 2020)

Controlling temperature with high spatial resolution has been a challenge and the bottleneck for advancing scientific discoveries at the micro-scale level. Herein, we exploit the heat generated from magnetic nanoparticles ...
Mechanism of Alcohol-Water Dehydrogenative Coupling into Carboxylic Acid Using Milstein's Catalyst: A Detailed Investigation of the Outer-Sphere PES in the Reaction of Aldehydes with an Octahedral Ruthenium Hydroxide

Hasanayn, Faraj; Al-Assi, Lara M.; Moussawi, Rasha N.; Omar, Boushra Srour (American Chemical Society, 2016)

In aqueous basic media, the square-pyramidal complex [Ru(PNN)(CO)(H)] (1-Ru, where PNN is a dearomatized bipyridyl-CH-PtBu2 pincer ligand) catalyzes the transformation of alcohols and water into carboxylates and H2. A ...
Mechanistic Analysis of the Pyrolysis of Vegetable Glycerin: A Reactive Force Field – Molecular Dynamics Study

AlGemayel, Christina; Zeaiter, Joseph; Talih, Soha; Saliba, Najat A.; Shihadeh, Alan Louis (Engineered Science Publisher, 2023)

Vegetable glycerin (VG, C3H8O3) is a triol found as an additive in food, pharmaceutical, and vaping products. Studying the pyrolysis of VG with the resulting species and their rates of formation is crucial in further ...
Medical Research Volunteer Program (MRVP): Innovative program promoting undergraduate research in the medical field

Dagher, Michael M.; Atieh, Jessica A.; Soubra, Marwa K.; Khoury, Samia J.; Tamim, Hani Mohammed; Kaafarani, Bilal R. (BioMed Central Ltd., 2016)

Background: Most educational institutions lack a structured system that provides undergraduate students with research exposure in the medical field. The objective of this paper is to describe the structure of the Medical ...
Metal-Ligand Proton Tautomerism, Electron Transfer, and C(sp3)-H Activation by a 4-Pyridinyl-Pincer Iridium Hydride Complex

Bhatti, Tariq M.; Kumar, Akshai; Parihar, Ashish; Moncy, Hellan K.; Emge, Thomas J.; Waldie, Kate M.; Hasanayn, Faraj; Goldman, Alan S. (American Chemical Society, 2023)

The para-N-pyridyl-based PCP pincer proligand 3,5-bis(di-tert-butylphosphinomethyl)-2,6-dimethylpyridine (pN-tBuPCP-H) was synthesized and metalated to give the iridium complex (pN-tBuPCP)IrHCl (2-H). In marked contrast ...
Metal-Organic Framework Photocatalyst Incorporating Bis(4′-(4-carboxyphenyl)-terpyridine)ruthenium(II) for Visible-Light-Driven Carbon Dioxide Reduction

Elcheikh Mahmoud, Mahmoud; Audi, Hassib; Assoud, Abdeljalil; Ghaddar, Tarek H.; Hmadeh, Mohamad (American Chemical Society, 2019)

In this study, we report the successful incorporation of the photoactive bis(4′-(4-carboxyphenyl)-terpyridine)ruthenium(II) (Ru(cptpy)2) strut into a robust metal-organic framework (MOF), AUBM-4. The single crystal X-ray ...
Metal-Organic Framework Photocatalyst Incorporating Bis(4′-(4-carboxyphenyl)-terpyridine)ruthenium(II) for Visible-Light-Driven Carbon Dioxide Reduction

Elcheikh Mahmoud, M.; Audi, H.; Assoud, A.; Ghaddar, T.H.; Hmadeh, M. (American Chemical Society, 2019)

In this study, we report the successful incorporation of the photoactive bis(4′-(4-carboxyphenyl)-terpyridine)ruthenium(II) (Ru(cptpy)2) strut into a robust metal-organic framework (MOF), AUBM-4. The single crystal X-ray ...
Metal-Organic Framework-74 for Ultratrace Arsenic Removal from Water: Experimental and Density Functional Theory Studies

Abu Tarboush, Belal J.; Chouman, Ali; Jonderian, Antranik; Ahmad, Mohammad N.; Hmadeh, Mohamad; Al-Ghoul, Mazen (American Chemical Society, 2018)

This study investigates and compares arsenic, As(V), removal from aqueous media using the water-stable zinc metal-organic frameworks (Zn-MOF-74) prepared via room-temperature precipitation (RT-Zn-MOF-74) and a solvothermal ...

Now showing items 188-207 of 357

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Browsing Department of Chemistry by Title

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