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Ziad Kamal Damaj

Associate professor
Chemistry - Biochemistry department - Section I - Hadath
Speciality: Chemistry
Specific Speciality: Chimie Inorganique

Education
2005-2008 Ph.D. in Inorganic and Coordination Chemistry

University of Reims Champagne-Ardenne, France.
Inorganic and Coordination Chemistry

très honorable

DEA : Master of Advanced Studies (MAS) in Analytical Chemistry and Chemical Materials,

European Engineering School of Polymers and Materials Chemistry (ECPM), University Louis Pasteur,
Analytical Chemistry and Chemical Materials,

Bien

Master in Chemistry (Maîtrise)

Lebanese University (UL), Faculty of Sciences
General Chemistry

Bien

Publications 13 publications
Y. Ngono-Ravache, Z. Damaj, A. Dannoux-Papin, M. Ferry, S. Esnouf, F. Cochin, G. De Combarieu, E. Balanzat Effect of swift heavy ions on an EPDM elastomer in the presence of oxygen: LET effect on the radiation-induced chemical ageing 2015

With the aim of understanding the radiation effects of alpha particles on polymers, this paper analyses the role of the heterogeneity of energy deposition, at the nanometric scale, on the radiation-induced oxidation of an ethylene-propylene-diene elastomer based on 1,4 hexadiene (EPDMh). This polymer was irradiated with 20Ne, at various Linear Energy Transfer (LET), in the presence of oxygen. Macromolecular defects such as carbonyls, alkenes and alkynes were monitored on-line, using Fourier Transform Infrared Spectroscopy (FTIR), and their evolution as a function of both LET and irradiation dose were studied. Carbonyl group consists of various chemical functions which absorption bands overlap one another in a limited spectral area. The different components were extracted by curve fitting, allowing monitoring the specific evolution of each of these chemical functions as a function of the irradiation conditions. Among carbonyl containing functions, the creation of ketone groups is the most important. LET influences the alkene radiation chemical yield at initial dose and, apart from trans-vinylene, it also influences the dose evolution of their concentration. Conversely, LET has no significant influence on the total carbonyl concentration.

Bouchra Sayed-Ahmad, Akram Hijazi1, Hassan Rammal, Ziad Damaj, Salam Nassredine, Zeinab Saad, Bassam Badran Determination of Bioactive compounds Including GC-MS Investigation of Hexane and Dichloromethane Extracts and the trace metal composition of Urtica dioica. J. Atoms and Molecules/ 4(3); 2014 / 713–725 2014

The present study was carried out to characterize the bioactive constituents present in hexane and dichloromethane extracts of whole plant of Urtica dioica using GC-MS analysis. The chemical compositions of these extracts was investigated after 2 steps of purification (silica gel-column chromatography and thin layer chromatography ) using Perkin – Elmer Gas Chromatography – Mass Spectrometry, while the mass spectra of the compounds found in the extracts was matched with the National Institute of Standard and Technology (NIST) library. On the other hand, metal content of Urtica dioica was analyzed, therefore, X-ray fluorescence (XRF) technique was used for the determination of the major trace elements in the plant and a microwave digestion procedure followed by atomic absorption spectrometry (AAS) was carried out for the determination of some important heavy metal content in our sample. Ten major phytochemical compounds were identified in the hexane extract which are mainly fatty acids and phenolic compounds, while eleven different compounds were found in the dichloromethane extract: they were essentially terpenoids, alkaloids and phenolic compounds. Thus the XRF assay shows that this plant contains metals with significant metabolic role primarily in the prevention of certain diseases such as asthma, in addition, the concentration of different heavy metals was found in healthy and normal quantities in the plant. All these results confirm that the U. dioica is a heartfelt source of bioactive compounds, which justifies its use in traditional medicine to treat various diseases.

Ziad Damaj, Catherine Joly, Emmanuel Guillon Toward New Polymeric Oxygen Scavenging Systems: Formation of Poly(vinyl alcohol) Oxygen Scavenger Film Packaging Technology and Science Article first published online: 24 NOV 2014, DOI: 10.1002/pts.2112 2014

Active packaging is a term that refers to the use of package to do more than merely protect the food from the outside environment. Amongst active packaging, oxygen scavengers can prevent oxidative damage to flavour and colour in a wide range of foods. They offer advantages in maintaining quality and extending shelf life. We thus present the use of a cobalt(II) complex with the ligand l-threonine as a new oxygen scavenger. This complex, in addition to its high reactivity with oxygen after water activation, can be obtained easily in large amounts and does not react with oxygen in solid state. Thus, the incorporation of the Co(II)(l-Thr)2(OH2)2 natural complex in organic polar polymer (poly(vinyl alcohol)) by casting process was conducted. The reactivity towards oxygen of the obtained films was evaluated by oxidation kinetics monitoring using ultraviolet–visible spectrophotometry as a function of time and relative humidity. Oxygen consumption of the active film was found equal to the complex alone (2.5 mg of O2 per gramme of complex) after water activation (90.5% relative humidity).

Study of the oxidation of polymers submitted to high LET (Linear Energy Transfer) ionizing radiation: LET and dose effects on in-chain defects creation. 2010

Présentation orale

Ziad Damaj, Aude Naveau, Laurent Dupont, Eric Hénon, Emmanuel Guillon Co(II)(l-proline)2(H2O)2 solid complex: Characterization, magnetic properties, and DFT computations. Preliminary studies of its use as oxygen scavenger in packaging films Inorg. Chem. Comm., 2009, volume 12, issue 1, 17-20. 2009

A solid CoII complex with l-proline as ligand was synthesized and fully characterized using spectroscopic studies, magnetic data, and DFT calculations. Dioxygen scavenging properties were investigated by UV/Vis spectroscopy and oxymetry techniques. The Co-proline system presented very interesting properties in matter of oxygen absorption capacity both in solution and incorporated in a polymer matrix.

Ziad Damaj, Federico Cisnetti, Laurent Dupont, Eric Hénon, Clotilde Policar, Emmanuel Guillon Synthesis, characterization, and dioxygen reactivity of copper(I) complexes with glycoligands. Dalton Trans., 2008, 24, 3235-3245. 2008

A new family of copper(I) complexes with "glycoligands" containing a central saccharide scaffold, with 2-picolyl ether groups or 2-picolylamine or N-imidazolylamine groups, has been prepared and characterized. For this purpose, the following tetradentate ligands have been synthesized: methyl 2,3-di-O-(2-picolyl)-alpha-D-lyxofuranoside (L1), 1,5-anhydro-2-deoxy-3,4-di-O-(2-picolyl)-d-galactitol (L2), 5-(amino-N-(2-salicyl))-5-deoxy-1,2-O-isopropylidene-3-O-(2-picolyl)-alpha-D-xylofuranose (L3), and 5-(amino-N-(2-salicyl))-5-deoxy-1,2-O-isopropylidene-3-O-(methylimidazol-2-yl)-alpha-D-xylofuranose (L4). The ligands and the complexes were characterized by elemental analysis, IR, 1H and 13C NMR spectroscopies, ESI mass spectrometry, and cyclic voltammetry. Collaterally with the experimental work, HF-DFT(B3LYP/6-31G*) computations were performed to obtain additional structural information. The Cu(I) complexes are found to be pentacoordinated. The redox properties and the O2-reactivity of the Cu(I)Ln complexes have been studied. Reactions of Cu(I) complexes with dioxygen in ethanol yield stable Cu(II) complexes as confirmed by UV-visible spectrophotometry and EPR spectroscopy.

Stéphanie Boudesocque, Ziad Damaj, Laurent Dupont, Jean-Bernard Behr, Emmanuel Guillon Thermodynamic and spectroscopic studies of copper(II) and nickel(II) complexes with a new proline-threonine dipeptide ligand. J. Inorg. Biochem., 2008, volume 102, issue 7, 1514-1522. 2008

Thermodynamic and spectroscopic studies of copper(II) and nickel(II) complexes with a new proline-threonine dipeptide ligand.

Toward new polymeric oxygen scavenging systems 2008

Oral presentation

Synthesis, characterization, and dioxygen reactivity of copper(I) complexes with glycoligands 2008

Poster

Reactivity complexes of Co(II) with oxygen: Application in active packaging 2007

Présentation orale

Glycoligands and Glycocomplexes: Application in active packaging 2007

Présentation orale

Toward new polymeric oxygen scavenging systems 2007

Poster

Toward new polymeric oxygen scavenging systems 2006

Poster

Supervision 4 Supervised Students
Synthèses et caractérisations des complexes métalliques

Jérôme Toug
Chemistry

Transition Metal Oxides as Electrode Buffer-Layer Materials in Organic Photovoltaic Devices

Mohamad MAAZ
Student in MAster 2

This internship report outlines the work I conducted while working on organic photovoltaics (OPV) within the Macromolecular Science & Engineering for Energy Conversion & Storage Group led by Prof. Pierre M. Beaujuge at the King Abdullah University for Science and Technology (KAUST). The objective of my work was the design, fabrication and characterization of various novel organic solar cell device configurations. One of the limiting factors in the efficiency of organic photovoltaic devices utilizing new generations of donor polymers is the ability to obtain Ohmic contacts between the electrodes and the organic layers. This is due to the fact these new donor polymers often have deeper energy levels, meaning that at the interfaces between the organic layer and the electrode, contact barriers are formed. PEDOT:PSS is the current benchmark material that is used to reduce or remove these contact barriers. However, even this material has a deep energy level and has serious issues with long term stability. One possible class of materials that might overcome these limitations and give increased device performance and lifetimes are metal oxides. During my work, I investigated the use of Nickel Oxide as hole transport layer, and other transition metal oxide as electrode buffer layers. In Parallel, I had the task of characterizing novel small-molecule, synthesized by our Organic Synthesis Laboratory, and investigate the possibility of using this new molecule in organic solar cells.

Synthèse et caractérisation des complexes de Cuivre(II), de Cobalt(II) et de Nickel(II) avec une série d’acides aminés

Hamis DOUGHMAN
étudiante Master 2

Dans le cadre de ce stage, des complexes métalliques (cuivre (II), cobalt (II) et nickel (II)) ont été synthétisés. Les complexes ont été préparés en milieu atmosphérique et caractérisés par diverses techniques physico-chimiques (spectroscopie IR, spectrophotométrie UV-Vis). Une famille de ligands naturels a été choisie (acides aminés). Des études potentiométriques ont été effectuées pour déterminer la stabilité des complexes formés. La coordination a été observée par infrarouge et par spectrophotométrie UV-visible et l’oxydation de cobalt (II) au cobalt (III) par spectrophotométrie UV-visible a été remarquée.

Analysis of PFAS precursors in biological matrices in order to contribute to the human food and internal exposure assessment

Wafaa HALLOUM
étudiante en Master 2

PFAS. Perfluoroalkylated substances . Analysis in fish. Human Milk. Urine

Languages
Arabic

Full professional proficiency

English

Professional working proficiency

French

Full professional proficiency