Ahmad Khodr Allouch

Full professor
Chemistry - Biochemistry department - Section III - Tripoli
Speciality: Chemistry
Specific Speciality: Physico-Chimie Analyse et Spectrométries
Interests: Lecture, Sport

Teaching 10 Taught Courses
(2014-2015) Bioc 402 - Structural Spectroscopic Analysis for biological Macromolecules

M1 Biochemistry

(2014-2015) Chim 427 - Project

M1 Analytical Sciences

(2014-2015) CHTH 580 - Training

M Refining and hydrocarbon technology

(2014-2015) Chim 229 - Analytical Chemistry I

BS Chemistry

(2014-2015) Chim 229 - Analytical Chemistry I

BS Chemistry

(2014-2015) Chim 330 - Atomistics

BS Chemistry

(2014-2015) Chim 330 - Atomistics

BS Chemistry

(2014-2015) Chim 339 - Molecular Spectroscopy

BS Chemistry

(2014-2015) Chim 345 - Spectroscopic and structural analysis Lab

BS Chemistry

(2014-2015) Chim 345 - Spectroscopic and structural analysis Lab

BS Chemistry

2002 - 2005: Très Honorable

Université Aix-Marseille I
Chimie Moléculaire


2001 - 2002: Bien

Université Aix-Marseille I
Physico-chimie, Analyse et Spectrométrie Moléculaire


1997 - 1999:

Université libanaise


1994 - 1997:

Université libanaise


1992 - 1993:

Lycée EL Malaab
Sciences de la Vie et de la Terre

Baccalauréat Scientifique

Conferences 1 participation
Publications 4 publications
Ahmad Allouch, Inas EL Hassan, Hanna El-Nakat, Noha Ghanem and Fawaz El Omar Determination of the stoechiometry and the association constant of a thiourea derivatives substrate-cyclodexrin complex International journal of pharmaceutical chemistry 2013

The determination of stoichiometry and association constant of inclusion complex of N-(2-methylphenyl)-N'-(2- methylphenyl) thiourea with hydroxypropyl-b-cyclodextrin (HP-b-CD) by mean of UV-visible spectrophotometry has been investigated. The stoichiometry of the complex formed was determined by continuous variation (Job's plot) method and the overall association constant and its corresponding uncertainties were determined by using Scott's method.

Inas EL Hassan, Ahmad Allouch, Adib Abou Dalle, Hanna El-Nakat and Fawaz El Omar Spectrophotometric and thermodynamic studies of the inclusion complexation of thiourea substrate with hydroxypropyl-ß-cyclodextrin Chem Sci Trans. 2013

A simple and fast spectrophotometric method has been used to determine the thermodynamic parameters of the inclusion complex formed between N-(2-ethylphenyl)-N'-(2- methylphenyl) thiourea, a hydrophobic substrate trap and hydroxypropyl-b-cyclodextrin (HP−b−CD). The overall association constants have been calculated at different temperatures using the Scott's method and are found to decrease with increase in temperature. The free energy change (DG°) and the enthalpy of formation (DH°) as well as the entropy (DS°) have been determined for the various inclusions. The method has been applied with satisfactory precision; the values of relative standard deviations did not exceed 2%.

Ahmad Allouch, Inas EL Hassan, Adib Abou Dalle, Hanna El-Nakat and Fawaz El Omar, Inclusion Complex of Thiourea Substrate with Hydroxypropyl-ß-cyclodextrin Chem Sci Trans. 2013

To be active, a heavy metal trap substrate must possess some degree of aqueous solubility. The use of cyclodextrins molecules, which can form inclusion complexes with the hydrophobic trap substrates, has provided the required solubility through the relatively hydrophobic cavity of native cyclodextrins and their derivatives that enhances the ability to complex hydrophobic substrates of appropriate size and shape. In this study, spectrophotometry has been used to investigate the effects of cyclodextrin on the solubility, stoichiometry and stability of the substrate-CD complex formed between N-(2-ethylphenyl)-N'-(2-methylphenyl) thiourea, (a hydrophobic substrate trap) and hydroxypropyl-β-cyclodextrin (HP−β−CD). The solubility, stoichiometry and overall association constant of the complex have been determined using the Higuchi’s method, the continuous variation (Job's plot) method and the Scott's method respectively.

Ahmad Allouch, Inas EL Hassan, Abdel Razzak AL Zeine, Adib Abou Dalle, Mohammad Bouchekara, Hanna El-Nakat and Fawaz El Omar, HPLC separation of hydrophobic atropisomers Int. J. Chem. Sci. 2012

The separation of racemic-N-[(2Z)-4-methyl-3-(2-methylphenyl)-1,3-thiazol-2(3H)-ylidene]-N- (2-chloro-4-nitrophenyl)amine, which belongs to the 2-aryl-imino-N-(2-aryl)-thiazoline family, to collect its atropisomers, was studied using reversed-phase high-performance liquid chromatography (RP-HPLC) with hydroxypropyl-gamma-cyclodextrin (HP-γ-CD) as a complexing additive to the racemic mixture (to obtain chiral molecules) and hexane-propan-2-ol as a mobile phase. The effects of mobile phase composition, concentration of HP-γ-CD and time of incubation of the CD-substrate on separation were systematically investigated to establish the optimum resolution conditions.


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