Dr. GHERRAS hammou غراس حمو
Faculté des Sciences Exactes
Département Chimie
Grade : Maitre de conférence classe A
Numéro de Téléphone :0777736153
Adresse électronique institutionnel
Adresse électronique personnel
Adresse postale :
Laboratoire de Chimie Organique, Macromoléculaire et des Matériaux


  • Fabrication and Characterization of Poly (aniline-co-4-bromoaniline)/Сlay Nanocomposite
  • La revue : Polymer Science, Series B
    Domaine : Chimie
    Mots Clés : Copolymer synthesis, solubility, poly(pyrrole-co-2-nitrocinnamaldehyde), pyrrole, 2-nitrocinnamaldehyde
    Auteur : N. E-h. Bouabida, A. Hachemaoui, A. Yahiaoui, H. Gherras, A. Belfedal, A. Dehbi, , A. H I. Mourad
    Issn : 1560-0904 Eissn : vol : 62, Num : 02, pp :
  • Date de publication : 2020-11-30
  • Résume :
    Poly(aniline-co-4-bromoaniline) nanocomposites were prepared via in situ polymerization in different molar ratio in the presence of Cu2+−monmorillonite. The X-ray diffraction confirmed that the basal space of Cu2+−montmorillonite increased after the organophilization. Poly(aniline-co-4-bromoaniline)/ Cu2+−monmorillonite nanocomposites were prepared by intercalating of aniline and 4-bromoaniline with treated organically layers of Cu2+−monmorillonite following by polymerization initiated by ammonium peroxdisulfate. The nanocomposites were characterized by FTIR, XRD, and UV–Vis spectroscopy.

  • Synthesis and characterization of poly(pyrrole-co-2-nitrocinnamaldehyde) (PPNC), a new copolymer for solar cells applications
  • La revue : Polymers and Polymer Composites
    Domaine : Chimie
    Mots Clés : Copolymer synthesis, solubility, poly(pyrrole-co-2-nitrocinnamaldehyde), pyrrole, 2-nitrocinnamaldehyde
    Auteur : H. Gherras, A. Yahiaoui, A. Hachemaoui, A. Belfedal, A. Dehbi, A. Zeinert
    Issn : Eissn : vol : , Num : , pp :
  • Date de publication : 2019-08-08
  • Résume :
    The use of conductive polymers as a substitute for metallic conductors and semiconductors has attracted much attention in the literature. In particular, aromatic heterocyclic polymers constitute an important class since they possess chemical and electrical stability in both the oxidized (doped) and neutral (undoped) state. A series of poly(pyrrole-co-2-nitrocinnamaldehyde) were obtained via the condensation of pyrrole and 2-nitrocinnamaldehyde in chloroform using acid exchanged montmorillonite clay called maghnite-Hþ as an efficient catalyst. The conjugated copolymer was characterized using proton nuclear magnetic resonance, ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy.

  • Synthesis and characterization of poly (2,5-diyl pyrrole-2-pyrrolyl methine) semiconductor copolymer
  • La revue : Journal of Semiconductors
    Domaine : Chimie
    Mots Clés : proposed technique; Maghnite-H+ catalyst; conducting PPPM copolymer; pyrrole; pyrrole-2-carboxaldehyde
    Auteur : H. Gherras, A. Yahiaoui, A. Hachemaoui, A. Belfedal, A. Dehbi, A-H I. Mourad;
    Issn : Eissn : vol : 39, Num : 09, pp :
  • Date de publication : 2018-09-28
  • Résume :
    In the current research, the proposed technique to synthesise poly {(2,5-diyl pyrrole) (2-pyrrolyl methine)} (PPPM) copolymer by condensation of pyrrole and pyrrole-2- carboxaldehyde monomers catalyzed by Maghnite-H+ is introduced. The protons are exchanged with Maghnite-H+, which is available in the form of a montmorillonite silicate clay sheet. The effect of several parameters such as time and temperature of copolymerization, [pyrrole]/[pyrrole-2-carboxaldehyde] molar ratio, amount of Maghnite-H+, and solvent on the produced poly (2,5-diyl pyrrole-2- pyrrolyl methine) semiconductor copolymer material (yield%) was investigated.

  • Synthesis of new nitrobenzylidene derivatives and pyrrole-based copolymers for dye-sensitized solar cells: effect of substituent on opto-electrical properties of dip-coated thin films
  • La revue : Surface Review and Letters
    Domaine : Chimie
    Mots Clés :
    Auteur : A. Remil, Y. Mouchaal , A. B. Reguig, A. L. Toumi, h. Gherrass, A. Hachemaoui, A. Yahiaoui , A. Khelil
    Issn : Eissn : vol : , Num : , pp :
  • Date de publication : 2017-11-28
  • Résume :
    The mastery of the optoelectronic properties of conjugated copolymers by substituting their radicals is a promising way for increasing the light absorption and charge career transport in the organic devices active layer. In this paper, we present the chemical synthesis of four di®erent conjugated benzaldehyde derivatives and pyrrole-based copolymers (P–P:B) followed by their conception in thin ¯lms on glass substrates by dip coating root from a solution in dichloromethane.

  • 3. Morphological and physicochemical properties of dip-coated poly (2,5-diyl pyrrole) [4-nitrobenzylidene] (PPNB) thin films: towards photovoltaic applications
  • La revue : Eur. Phys. J. Appl. Phys
    Domaine : Chimie
    Mots Clés :
    Auteur : Y. Mouchaal, H. Gherras, A. B. Reguig, A. Hachemaoui, A. Yahiaoui, M. Makha, A.Khelil, J-C. Bernede
    Issn : Eissn : vol : , Num : , pp :
  • Date de publication : 2015-02-25
  • Résume :
    A new material: conjugated poly {(2,5-diyl pyrrole) [4-nitrobenzylid`ene]}, that we called (PPNB), has been synthesized and characterized. The cyclic voltammetry has been used in order to estimate first oxidation (Ep) and reduction (En) potentials of our polymer. These values have been assigned, respectively, to the position of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) and determination of the energy band gap which have been estimated to be 6.16, 3.89 and 2.27 eV respectively.

  • Poly [(pyrrole-2, 5-diyl) co (4-Nitro benzylidene)]: A new synthetic approach and electronic properties
  • La revue : MaterialsScienceandEngineering
    Domaine : Chimie
    Mots Clés :
    Auteur : H. Gherras, A. Hachemaoui, A. Yahiaoui, M. Belbachir , A. Belfedal
    Issn : Eissn : vol : , Num : , pp :
  • Date de publication : 0000-00-00
  • Résume :
    A new poly (heteroary1ene methylene) containing one to four -pyrrole rings alternating with an sp3-carbon atom in the main chain were synthesized and characterized. The synthesized poly [(pyrrole-2, 5-diyl)-co-(4-nitrobenzylidene)] was found to be highly dehydrogenated, thus resulting in black materials with conjugated segments larger than a single pyrrole ring. The conjugated polymers containing alternating aromatic and quinoid heteroarylene moieties in the main chain were prepared by polycondensation of 4-nitrobenzaldehyde and pyrrole catalysed by Maghnite-H+.

  • Chemical synthesis and characterization of a new soluble conducting polymer
  • La revue : Synthetic Metals
    Domaine : Chimie
    Mots Clés :
    Auteur : H. Gherras, A. Hachemaoui, A. Yahiaoui, A. Benyoucef, A.Belfedal, M.Belbachir
    Issn : 03796779 Eissn : vol : , Num : , pp :
  • Date de publication : 2012-01-30

  • Communications

  • Lieu de communication : Relizane
  • date debut : 2020-02-10
  • date fin : 2020-02-10
  • Lieu de communication : Bejaia
  • date debut : 2018-10-14
  • date fin : 2018-10-14
  • Lieu de communication : Boumerdes
  • date debut : 2017-11-07
  • date fin : 2017-11-07
  • Lieu de communication : Tlemcène
  • date debut : 2017-04-25
  • date fin : 2017-04-25
  • Lieu de communication : Mascara
  • date debut : 2014-03-12
  • date fin : 2014-03-12
  • Lieu de communication : Mascara
  • date debut : 2014-05-13
  • date fin : 2014-05-13
  • Lieu de communication : Oran
  • date debut : 2013-09-25
  • date fin : 2013-09-25
  • Lieu de communication : Marrakech, Morocco
  • date debut : 2013-05-29
  • date fin : 2013-05-29

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