Mes recherches My research
High-Resolution Infrared Spectroscopy of Symmetric Top Molecules
Objectifs - Publications
Méthodologie de Travail - Enregistrement de spectres
Ne disposant, in situ, d'aucune infrastructure expérimentale dans ce domaine de recherche, la première étape du travail a consisté à enregistrer des spectres à haute-résolution chez des partenaires Européens et la seconde à analyser et interpréter ces spectres à Rabat et Kénitra . Les spectres ont été enregistrés dans plusieurs laboratoires:
Keywords
Phosphorus trifluoride PF3; Nirogen trifluoride NF3, Methyl Chloride CH3Cl, Methyl Bromide CH3Br, Methyl fluorure Sylil Deutered SiD3F, Rovibrational constants; Harmonic wavenumbers; Anharmonic constants; Equilibrium structureMots clès
Trifluorure de phosphore PF3; Trifluorure d'azote NF3, Chlorure de méthyle CH3Cl, Bromure de méthyle CH3Br, Fluorure de Silicium trideutérée SiD3F, Constantes rovibrationnelles; Longueurs d'onde harmoniques ; Constantes anharmoniques ; Structure d'équilibreSpectroscopie moléculaire
La spectroscopie moléculaire est une méthode de mesure couramment utilisée aussi bien en laboratoire que sur le terrain et a des retombées directes sur l'environnement. Elle est en effet à la base de la compréhension de phénomènes comme le réchauffement de notre planète ou le trou dans la couche d'ozone; et est utile pour les corrections atmosphériques en télédétection. La thématique de mes recherches revêt un double caractère théorique et pratique.
- Sur le plan théorique, l'étude des spectres infrarouges de molécules de type toupies symétriques permet d'accéder à des niveaux vibrationnels fondamentaux et excités et à des nombres quantiques de rotation élevés. La connaissance de ces niveaux est indispensable à 'tester'' certaines invariances dans des réductions de l'Hamiltonien moléculaire très récemment mises au point par des théoriciens.
* H. NAJIB et N. BEN SARI-ZIZI
Analyse rotationnelle de la bande infrarouge 2ν3 du bromure de méthyle
Journal de Physique 46, 2075-2081 (1985)----------------------------------------------------------------------------
* H. NAJIB, N. BEN SARI-ZIZI, G. GUELACHVILI AND C. ALAMICHEL
Study of the ν2 + ν3 and 2ν6 infrared bands of CH379Br and CH381BrJournal of Molecular Spectroscopy 114, 321-335 (1985)
https://doi.org/10.1016/0022-2852(85)90229-2
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* H. NAJIB, N. BEN SARI-ZIZI, H. BÜRGER, G. GUELACHVILI AND C. ALAMICHEL
Anharmonic resonances between the upper rovibrational levels of the and infrared bands of CH3 35Cl studied in a high-resolution FTIR spectrum from 4250 to 4600 cm-1
Molecular Physics, 70, 849-862 (1990)
https://doi.org/10.1080/00268979000101401
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* M. OUAHMAN, H. NAJIB AND N. BEN SARI-ZIZI
Etude rovibrationnelle de la bande chaude ν3+ν5−ν3 (E) du bromure de méthyl CH379Br autour de 1440 cm−1
Spectrochimica Acta, 47A, 493-500 (1991)
https://doi.org/10.1016/0584-8539(91)80127-5
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* H. NAJIB, N. BEN SARI-ZIZI AND C. ALAMICHEL
Rovibrational study of the ν2 + ν±14, ν2 + 3ν±16, ν1 + ν±15, ν±14 + ν±15, ν±14 + ν±5, ν±5 + 3ν±16, ν±5 + 3ν±36 and ν1 + ν2 infrared bands of CH335Cl studied in a high-resolution FTIR spectrum from 4250 to 4600 cm−1
Spectrochimica Acta, 49A, 31-41 (1993)----------------------------------------------------------------------------
* H. NAJIB, N. BEN SARI-ZIZI, H. BÜRGER, A. RAHNER AND L. HALONEN
High-Resolution FTIR Investigation of PF3 in the 300-550 cm−1 Region: The Ground, v2 = 1, and v4 = 1 States
Journal of Molecular Spectroscopy 159, 249-258 (1993)----------------------------------------------------------------------------
* H. NAJIB, N. BEN SARI-ZIZI, G. GUELACHVILI AND C. ALAMICHEL
’Fourier transform high-resolution study of the 2ν4 rovibrational band of CH335Cl from 5980 cm-1 up to 6220 cm-1----------------------------------------------------------------------------
* N. BEN SARI-ZIZI, H. BÜRGER, M. LITZ, H. NAJIB AND J. RADTKE
High Resolution FTIR Study of PF3in the 800–950 cm−1 Region. The ν1 and ν3 Fundamental and ν2+ ν4 Combination Bands
Journal of Molecular Spectroscopy 177, 46-57 (1996)----------------------------------------------------------------------------
* M. BADAOUI, N. BEN SARI-ZIZI, H. NAJIB AND G. GRANER
Study of the v4 = 2 and v4 = 3 States of PF3 by High Resolution Infrared Spectroscopy
Journal of Molecular Spectroscopy 184, 318-329 (1997)
https://doi.org/10.1006/jmsp.1997.7336
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* N. BEN SARI-ZIZI, H. NAJIB, R. SEBIHI AND P. PRACNA
High-Resolution FTIR Study of the (ν3+ ν4, ν1+ ν4) Interacting System of Rovibrational Bands of PF3Between 1100 and 1300 cm−1
Journal of Molecular Spectroscopy 190, 15-27 (1998)
https://doi.org/10.1006/jmsp.1998.7568
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* N. BEN SARI-ZIZI, H. NAJIB, H. BÜRGER, E.B. MKADMI, Z. KISIEL, M. YU. TRETYAKOV, J. DEMAISON, L. MARGULES AND P. PRACNA
High-Resolution FTIR and Millimeter-Wave Study of D3SiF: The Ground, v3 = 1, and v6 = 1 and 2 States
Journal of Molecular Spectroscopy 197, 85-99 (1999)
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* N. BEN SARI-ZIZI, H. NAJIB, R. SEBIHI AND M. BADAOUI
High-resolution FTIR study of the ν1+ν2 combination band of PF3 around 1380 cm−1
Journal of Molecular Structure 517-518, 79-89 (2000)
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* N. BEN SARI-ZIZI, H. NAJIB, J. DEMAISON, L. MARGULES, Z. KISIEL, M. Yu. TRETYAKOV, E. B. MKADMI and H. BÜRGER
High-Resolution Infrared and Millimeter-Wave Study of D3SiF: The Ground and v3=1 States of the 29Si and 30Si Species, and the v3=v6=1 and v3=2 States of D328SiF
Journal of Molecular Spectroscopy 208, 1-9 (2001)
https://doi.org/10.1006/jmsp.2001.8361
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* N. BOULAFTALI, N. BEN SARI-ZIZI, H. NAJIB, H. BÜRGER, E. B. MKADMI AND G. GRANER
The (ν1, ν4, ν2+ν3, ν3+ν5) Polyad of D328SiF around 1600 cm−1, Studied by High-Resolution FTIR Spectroscopy
Journal of Molecular Spectroscopy 213, 1-17 (2002)
https://doi.org/10.1006/jmsp.2002.8577
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* H. NAJIB
Proceeding, Optique02, Kénitra, 16-19, Otobre 2002----------------------------------------------------------------------------
* H. NAJIB
Proceeding, Optique02, Kénitra, 72-76, Otobre 2002
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* H. NAJIB, N. BEN SARI-ZIZI, J. DEMAISON, L. MARGULES, E. B. MKADMI AND H. BÜRGER
High-resolution infrared and millimeterwave spectra of the v3=1 vibrational state of 14NF3 at 907 cm−1
Journal of Molecular Spectroscopy 220, 214-222 (2003)
https://doi.org/10.1016/S0022-2852(03)00127-9
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* N. BEN SARI-ZIZI, H. NAJIB, J. DEMAISON, B. BAKRI, J. M. COLMONT AND H. BÜRGER
High-resolution FTIR and MMW study of the v4 = 2 (A1, E) excited state of 14NF3 near 985 cm−1: the axial ground state rotational constants derived by the “loop-method”
Journal of Molecular Spectroscopy 228, 511-527 (2004)----------------------------------------------------------------------------
* A. Jabar, H. NAJIB, N. Ben Sari-Zizi, B. El Fakir et A. Chouiyakh
Proceeding, Optique06, INPT, 433-437, Avril 2006
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* N. BENSAR-ZIZI, H. NAJIB
High-resolution infrared study of the 2ν3 (A1, E) and ν1 + ν3 (E) bands of 14NF3
Journal of Molecular Spectroscopy, 240, 210-226 (2006)
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* Abderrahim Jabar AND Hamid Najib
Afr. Sci. 03 (1) 79-89 (2007)----------------------------------------------------------------------------
* Hamid Najib AND Abderrhim Jabar
Centres de bandes et constantes d'anharmonicité de la molcule du trifluorure de phosphore PF3
Can. J. Phys. 85 259-268 (2007)----------------------------------------------------------------------------
* Hamid Najib
Vibrational constants of the symmetric top molecule PF3----------------------------------------------------------------------------
* Siham Hmimou, Hicham Msahal, and Hamid NAJIB
First high-resolution FTIR study of the v1 = v4 = 1 rovibrational state of 14NF3 near 1523 cm-1----------------------------------------------------------------------------
* Hicham Msahal, Hamid NAJIB, and Siham Hmimou
A new analysis of the ν4(E) rovibrational band of the symmetric top molecule PF3
Journal of Molecular Spectroscopy 264, 37-42 (2010)
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* Hamid Najib and Hicham Msahal
’New study of the ν2(A1) infrared band of phosphorus
trifluoride molecule
Molecular Physics 109, 11953-1956 (2011)
https://doi.org/10.1080/00268976.2011.604048
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* Hamid Najib, Siham Hmimou and Hicham Msahal
’High-resolution infrared spectroscopy of the ν1 + ν4 band of 14NF3:
Reductions of the rovibrational Hamiltonian
E-Journal of Chemistry 9(1), 253-259 (2012)
ISSN: 0973-4945; CODEN ECJHAO
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* Hamid Najib
Reinvestigation
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* Hamid Najib
Rovibrational Interaction and Vibrational Constants of
the Symmetric Top Molecule 14NF3
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* Hamid Najib
A new treatment of the v4 = 2 excited state of the symmetric top molecule PF3 around 693 cm−1
Journal of Molecular Spectroscopy, 289, 61-64 (2013)
https://doi.org/10.1016/j.jms.2013.05.001
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* Hamid Najib
Experimental rovibrational constants and equilibrium structure of phosphorus trifluoride
Journal of Molecular Spectroscopy, 305, 17-21 (2014)
https://doi.org/10.1016/j.jms.2014.09.008
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* Hamid Najib
Experimental values of the rotational and vibrational constants and equilibrium structure of nitrogen trifluoride
Journal of Molecular Spectroscopy, 312, 1-5 (2015)https://doi.org/10.1016/j.jms.2015.02.002
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* Hamid Najib
Experimental values of the rotational and vibrational constants of deuterated silyl fluoride
* Hamid Najib
A new treatment of the 2ν3 (A1) infrared band of methyl bromide CH3Br around 1213 cm−1
Journal of Molecular Spectroscopy, 370, 111297 (2020)