Dissertations / Theses on the topic 'Spectre IR'
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Kharroubi, Hassane. "Étude du pouvoir réflecteur de monocristaux uniaxes et biaxes dans l'infrarouge lointain." Nancy 1, 1994. http://www.theses.fr/1994NAN10108.
Full textKakou, Yao Rita Carolina Angora. "Ethane et 1,2-dideutérioéthane : Spectre IR-TF et photoisomérisation induite par irradiation infrarouge sélective en matrices cryogéniques." Aix-Marseille 1, 1990. http://www.theses.fr/1990AIX11285.
Full textGledel, Corinne. "Couches minces amorphes déposées par évaporation flash de composés ternaires du type LixV₂ 0₅ et MPS₃ (M = Mn, Fe, Ni, Sn, Cd, In) : caractérisation structurale et propriétés." Paris 11, 1988. http://www.theses.fr/1988PA112039.
Full textThis work is essentially devoted to the synthesis and study of amorphous thin films obtained from lamellar crystalline materials such as LixV₂ 0₅ (0 ≤ x ≤ 0. 2), M¹¹PS₃ (M= Mn, Fe, Ni, Cd, Sn and ln2/3)The achievement of materials presenting a correct stoichiometry has required the realization of a flash evaporation device operating at 1500° C and adapted to allow quenching of the vapor at liquid nitrogen temperature. The amorphous thin films have been characterized by, optical and electron scanning microscopy, microscopy, microprobre, UV-visible and I. R. Spectroscopies. Their electrical conductivity has been studied and compared with the crystalline parent compounds. The local atomic arrangement (short range order) of several MPS₃ films has been studied using the E. X. A. F. S. Technique. Results show that the films have the same basic structure as the parent crystalline compounds, but deviati0ns are observed, depending on the metal M. The possibility of applying these films to design new photovoltaic devices has been examined. Amorphous V₂0₅ and LixV₂0₅ films have n type semiconducting properties and they lead to photosensitive p-n junction when deposited on to p type silicon wafers. Finally, we have examined the possibility of synthesing new amorphous M₃Ps₄ materials either by flash evaporation and by a novel soft chemistry, i. E. Synthesis by reaction M ions in acetonitrile on the PS₄ ³- Ligand
Dupont, Virginie. "Synthèse et analyse structurale de n-hydroxy peptides." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL099N.
Full textLahbabi, Khalid. "Etude et realisation d'un dispositif de mesure, dans le spectre infrarouge, de l'emissivite des materiaux opaques." Paris 6, 1986. http://www.theses.fr/1986PA066115.
Full textHaddad, Mansour. "Synthèse des ( +ou- ) lupinine et ( +ou- ) isoretronecanol : extension à des composés homologues." Paris 6, 1986. http://www.theses.fr/1986PA066062.
Full textGrira, Asma. "Atmospheric degradation of oxygenated Volatile Organic Compounds." Thesis, Rennes 1, 2021. http://www.theses.fr/2021REN1S017.
Full textOxygenated Volatile Organic Compounds (OVOCs), mainly released from biogenic sources, play a major role in atmospheric chemistry, climate change, environment, and health. These emissions have been recently shown to increase in the case of biotic and/or abiotic stresses. Biogenic OVOCs may undergo a wide variety of reactions, both chemical and photolytic, and they contribute in the formation of Secondary Organic Aerosols (SOAs). These compounds have been detected in various areas, but little is known about their degradation processes under tropospheric conditions. Understanding the oxidation mechanisms of these species is of fundamental interest and yields crucial data for atmospheric models used by policymakers in formulating and deciding strategies for improving air quality. This dissertation aims to improve the current knowledge of those OVOCs behaviors to better understand their impact on atmospheric chemistry. This work reports a detailed study of the atmospheric degradation of C5-C7 unsaturated aldehydes and C5-C8 unsaturated alcohols by ozone, Cl atom, and OH radical. The main objectives were to better understand the reaction mechanism and to feature the SOA formation potential. To achieve these objectives, we focused on four topics: (i) determination of IR and UV spectrum of C5-C7 unsaturated aldehydes, (ii) determination of the rate constant for the studied OVOCs + Oxidant at room temperature, (iii) identification and quantification of the gas-phase products, (iv) determination of the SOA yields. The product studies were investigated both with and without adding an OH radical scavenger. Experiments were performed in eight different static (chambers) or dynamic (flow) reactors, and various analytical techniques were used to investigate the reaction products (FTIR, GC-FID/MS, SPME-GC/MS, HPLC, PTR-ToF-MS, SIFT-MS, PLP-LIF) and SOA formation (SMPS, FMPS)
Stichauer, Libor. "Étude des propriétés optiques et magnéto-optiques de films nanocristallins de ferrite de cobalt." Nancy 1, 1994. http://www.theses.fr/1994NAN10365.
Full textBelhayara, Khedidja. "Spectre IR de l'élongation X-H en liaison hydrogène : influence conjointe de la rotation, des résonances de Fermi, de l'anharmonicité et de la relaxation indirecte." Perpignan, 2003. http://www.theses.fr/2003PERP0484.
Full textTheoretical study of the infra-red spectrum of X-H elongation in weak hydrogen bonds: i) the spectral density is obtained by Fourier transform of the autocorrelation function of the operator dipole moment, ii) the hydrogen bond is modelled by three types of quantum oscillators (fast, slow and bending), iii) two types of coupling are taken into account: strong anharmonic coupling between the fast and slow modes, and the coupling of Fermi between the fast and one or several bending modes, iv) the intrinsic anharmonicity of the hydrogen bridge is integrated jointly into the taking into account of only one coupling of Fermi, and this beyond the adiabatic and exchange approximations, v) within the framework of adiabatic, harmonic and exchange approximations, the relaxation of the three oscillators is introduced in the presence of several Fermi resonance, vi) in the last model, the Doppler effect and the rotational structure are taken into account. The numerical experimentation leds to the following conclusions: i) very general character of the Fermi resonances in hydrogen bonds. Ii) the condition of resonance should not be necessarily filled iii) in certain cases the number of windows is equal to the number of resonances. Iv) the relative intensity of lineshape and their position depend strongly on the values of three relaxations. V) intrinsic anharmonicity of the hydrogen bridge shifts the center of the band towards the high frequencies when the temperature increases. Vi) the rotational structure in gas phase explains the similitude of the spectra in liquid and gas phases
Torrès, Ghislaine. "Étude de la réaction d'hydrosilylation et application à la synthèse d'un copolymère à blocs poly(sulfone-b-siloxane) : caractérisation des réactions secondaires." Paris 6, 1986. http://www.theses.fr/1986PA066308.
Full textFerchichi, Olfa. "Étude des propriétés structurales et spectroscopiques de peroxydes aux niveauxDFT et ab initio." Thesis, Reims, 2020. http://www.theses.fr/2020REIMS017.
Full textThis PhD research is devoted to the study of the structural parameters and the IR and UV spectra of three peroxides which have been challenging scientists for many decades. The first result achieved in this thesis shows that the disagreement between experimentalists and theorists concerning the COOC torsional angle of dimethyl peroxide could be explained by a dynamic structure with a very slow torsional movement. A second study was carried out on the FOOF molecule for which theorists had failed, for decades, to obtain an accurate equilibrium structure. We successfully demonstrated that the true reason is related to the flatness of the potential energy surface, leading to large-amplitude motions. The equilibrium structure must therefore be averaged vibrationally to obtain accurate bond lengths. The last study concerns chlorine peroxide, ClOOCl, one of the key molecules contributing to stratospheric ozone depletion. The first result shows that the structure of ClOOCl not only needs to be averaged vibrationally but that core-valence correlation and relativistic effects must also be accounted for. The second result proves that the decomposition of ClOOCl into O2 + 2Cl on excited state surfaces does not occur in two steps, but follows a concerted mechanism. It has finally been demonstrated that the isomers ClClOO and ClOClO also contribute to the catalytic destruction of ozone. These results represent a completely new and unprecedented discovery
Renko, Zafiarisoa Dolor. "Synthèse totale de porphyrines protégées sur leurs deux faces (Porphyrines "Gyroscopes")." Paris 6, 1986. http://www.theses.fr/1986PA066274.
Full textTsobgny, Brigitte. "Nouveaux matériaux vitreux thiohalogènes transparents dans l'infrarouge." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1989. http://tel.archives-ouvertes.fr/tel-00620745.
Full textBica, Eduardo. "Une nouvelle approche pour la synthese de populations stellaires dans les galaxies." Paris 7, 1987. http://www.theses.fr/1987PA077092.
Full textQuirico, Éric. "Etudes spectroscopiques proche infrarouges de solides moléculaires : application à l'étude des surfaces glacées de Triton et Pluton." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10237.
Full textYoukharibache, Philippe. "Systèmes de coordonnées dans l'étude des vibrations moléculaires : détermination ab-inito des champs de force : confrontation expérimentale et transférabilité." Paris 6, 1986. http://www.theses.fr/1986PA066322.
Full textYAO, JIANHUA. "Systeme sirs-ss : simulation spectrale ir et raman, par association sous-structures/sous-spectres." Paris 7, 2000. http://www.theses.fr/2000PA077236.
Full textKhan, Mustayeen Ahmed. "Stabilite, spectres electroniques et structures des halogenocuprates en milieu protique." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13059.
Full textHemici, Mustapha. "Spectroscopie laser sur niveaux électroniques excités d'excimères et d'ions de gaz rares." Saint-Etienne, 1994. http://www.theses.fr/1994STET4015.
Full textPERMOGOROV, DMITRI. "Spectroscopie intracavite laser des transitions harmoniques du methane, silane, germane et de leurs derives deuteres dans les domaines visible et proche infrarouge." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10074.
Full textCarniato, Denis. "Nouveaux inhibiteurs de l'alanine racemase : les acides α-aminophosphoniques β-fonctionnalisés". Paris 6, 1986. http://www.theses.fr/1986PA066029.
Full textQuiroga, Jean-Manuel. "Étude des propriétés optiques de multicouches a-Si:H/a-SiO2." Grenoble 1, 1998. http://www.theses.fr/1998GRE10124.
Full textMarques, Leonel Vitorino Joaquim. "Transformations de phases du C60 sous pression." Université Joseph Fourier (Grenoble ; 1971-2015), 1996. http://www.theses.fr/1996GRE10188.
Full textBrodbeck, Claude. "Transitions doubles induites par collisions dans des melanges gazeux comprimes." Paris 6, 1987. http://www.theses.fr/1987PA066285.
Full textDelatour, Thierry. "Mise en évidence par spectrométries optiques de formes tautomères caractéristiques d'un pyridylazo diethylaminophénol." Nancy 1, 1987. http://www.theses.fr/1987NAN10159.
Full textGuillet, Stéphane. "Etude des propriétés électroniques des interfaces Ag/Si(100) et Cu/Si(100)." Grenoble 1, 1993. http://www.theses.fr/1993GRE10065.
Full textLuthra, Antriksh. "Mid-IR Plasmonics, Cavity Coupled Excitations, and IR Spectra of Individual Airborne Particulate Matter." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu148362252748271.
Full textCali, José. "Etude des paramètres microscopiques de la piézorésistivité de couches minces polycristallines de silicium dopé bore." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10055.
Full textRossignol, Sylvie. "Sur de nouveaux verres oxyiodes conducteurs de l' ion Ag+. Corrélations structures-propriétés de transport." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1994. http://tel.archives-ouvertes.fr/tel-00139663.
Full textLiutkevič, Svetlana. "BiSI ir BiSeI kristalų elektroninės struktūros ir optinių savybių tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110627_113653-67375.
Full textIn this work electronic structure of the valence band and optical properties of the semiconducting BiSI and BiSeI crystals are investigated in the energy range 0 – 25 eV. Calculations were made with ab initio based on the density-functional theory (DFT) with program Wien2k. The full potential linearized augmented plane wave (FP-LAPW) method was used with the generalized gradient approximation (GGA).Dielectric functions imaginary and real parts of BiSI and BiSeI crystals agree satisfactory with corresponding experimental dependences obtained by spectroscopic ellipsometry technique in the spectral range of 1 – 5.5 eV. Experimentally investigated imaginary and real parts spectra have been described by contribution of four Lorentz – type lines in the model of pseudo-dielectric function (PDF).
Nguyen, Thi Nguyet Que. "Nouveaux développements en histologie spectrale IR : application au tissu colique." Thesis, Reims, 2016. http://www.theses.fr/2016REIMS040/document.
Full textRecent developments in IR vibrational microspectroscopy and numerical multidimensional analysis have led to the emergence of spectral histology. At the tissue level, this new approach represents an attractive tool for a better analysis and characterization of pathophysiological states and for diagnostic challenges. Here, using normal murine and human colon tissues, data processing steps have been improved for automating and optimizing this spectral histology. First, the development of a hierarchical double application of validity indices permitted to determine the optimal number of clusters that correctly identified the different colon histological components. Second, this method has been improved to perform spectral histology at the inter-individual level. For this, EMSC (Extended Multiplicative Signal Correction) preprocessing has been successfully combined to k-Means clustering. Finally, given the ability of metaheuristics to solve complex optimization problems, a memetic algorithm has been developed for IR spectral data clustering. This algorithm is composed of a genetic algorithm and a k-Means clustering refinement. Compared with conventional clustering methods, our memetic algorithm allowed to generate an optimal and initialization-independent clustering
Peng, Tao. "Quantitative Modelling of the Shifts and Splitting in the IR Spectra of SF6 in an Ar Matrix." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/1278.
Full textJana, Chandramohan. "Modelling the structure and IR spectra of micro-hydrated ions." Palaiseau, Ecole polytechnique, 2014. https://tel.archives-ouvertes.fr/tel-01120935/document.
Full textIon micro-hydration has been modeled by a combination of classical and quantum methods. The structures, dynamics and IR spectra of micro-hydrated cluster ions ranging from 1 to 216 water molecules have been considered with special emphasis on the comparison to recent experimental data. Quantum modeling has been used to provide reference values against which the polarizable AMOEBA force field could be calibrated. Extension of the parameter set was carried out in some cases, in particular when improvement of the electrostatic and polarization energy terms was deemed necessary. Classical molecular dynamics was then used with two different aims: (1) extensive exploration of potential energy surfaces for large cases with numerous low energy minima, for which statistical sampling is required, and (2) computation of IR spectra through Fourier transform of the Dipole moment AutoCorrelation Function (DACF), at various temperatures. The hydration of Zn2+ was studied in detail. While the coordination number (CN) of zinc cation is firmly established to be six in bulk solution, recent experimental and computation studies in the gas phase have unveiled a complex pattern for small clusters with up to 12 water molecules with a CN more near 5 or maybe even 4. Our calculations, performed from 6 to 216 water molecules, allow a precise description of CN evolution with cluster size. Sodiated tryptamine with one or two water molecules attached was investigated in order to interpret gas phase IR spectra of these species. Particular care was taken of electrostatics - especially atomic charges - and of starting structures in molecular dynamics simulations. It was then possible to investigate temperature-dependent dynamics in detail and to obtain good agreement with IRPD spectra. Finally, the hydration of the sulfate anion with up to 100 water molecules was analyzed focusing on the existence of dangling O-H bonds on the cluster surface as a function of cluster size. In agreement with IRPD experiments, we find that small clusters are compact with no dangling bond. The latter appear when ca. 25 water molecules are present with a characteristic vibrational band. Overall, these results underline the requirements for accurate modeling of ion hydration. These involve refined treatment of electrostatic and polarization interactions, extensive sampling of the potential energy surfaces, careful treatment of cluster boundaries including a confining repulsive wall, and long-time simulations to attain converged radial distribution functions. With such developments at hand, it is now possible to obtain a realistic picture of structures and dynamics of large micro-hydrated cluster ions, as can be judged from the comparison to experiment, especially vibrational spectroscopy
Richenderfer, Andrew Jonathan. "Development of MiST-IR : multi-spectral infrared thermography." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/103700.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 91-92).
In this thesis, I present a new diagnostic technique for interrogating boiling heat transfer phenomena. The technique, called Multi-Spectral Infrared Thermography or MiST, builds on previous diagnostic techniques for measuring the 2-D wall temperature distribution or the 2-D phase distribution of the fluid above the surface. These methods make use of infrared thermography, a well developed practice involving the use of a high-speed infrared camera to collect visual data. By analyzing the data with both qualitative and quantitative tools, insights into boiling heat transfer mechanisms can be gained. In addition to the MiST technique, a refined infrared camera calibration model is presented for accurately determining the wall temperature. MiST is a new technique that allows for the simultaneous measurement of both the temperature distribution and the phase distribution. This is in sharp contrast to previous techniques which have only allowed the measurement of one or the other. MiST uses a highly engineered, semi-transparent, thin-film heater to enable the simultaneous measurement of the two properties. The heater separates the two signals, one from the temperature and one from the phase, by taking advantage of two regions of the electromagnetic spectrum. By spectrally separating the two signals, no limitation in resolution or field of view is made. The refined camera calibration model presented builds on previous work, which quantified the radiation captured by the camera and used a coupled radiation and conduction model to back out the complete axial temperature distribution within the heater. The new model refines the older version by taking into account spectrally varying optical properties within the heater. The spectral data is easily acquired with a Fourier transform infrared spectrometer, and fed into the radiation model for enhanced accuracy. The development of MiST presents new opportunities in boiling heat transfer for insight into a complex phenomena. The use of MiST in boiling and condensation experiments will lead to the development of new heat transfer models, and can provide high-resolution data for computational fluid dynamics models. MiST presents the logical progression forward in boiling diagnostic tools as it provides enhanced data acquisition opportunities when compared to it's legacy versions.
by Andrew Jonathan Richenderfer.
S.M.
Chaabouni, Henda. "Étude par spectroscopie infrarouge de l'ozone et du dioxyde de soufre adsorbés sur la surface de la glace ou piégés dans son volume entre 10 et 170 k. Effets d'irradiation à 266 nm sur le mélange O3 + SO2 piégé en matrice d'argon ou dans la glace." Paris 6, 2001. http://www.theses.fr/2001PA066230.
Full textPlantier-Niel, Hélène. "Mécanismes d'oxydation et caractérisation de couches d'oxyde réalisées à basse température par anodisation plasma sur silicium mono et poly-cristallin, germanium et alliages Si(1-x)Gex." Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10206.
Full textHuang, Xianglei Wennberg Paul O. "I: Variability of the outgoing thermal IR spectra and its application in GCM validation. : II: The detection of cloud/aerosol in the outgoing thermal IR spectra /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-05032004-150434.
Full textNikouline, Alexandre. "New preprocessing methods for better classification of MR and IR spectra." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ32009.pdf.
Full textSaunders, Charles William. "Characterization of cellulose esters via GPC/FT-IR." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135448/.
Full textGrybaitė, Rita. "Ce I atomo energijos spektro ir šuolių tyrimas vienkonfigūraciniu Hartrio ir Foko artiniu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090629_130243-69770.
Full textThe work consists of 2 chapters. Chapter 1 deals with a short literature review. Chapter 2 deals with experimental and theoretical energy spectrum comparison in diagram form and calculating form, and their results’ analysis; bound types and their distribution and probabilities. The results of experimental calculating are given in appendices.
Mathieu, Didier. "Vibrations moléculaires de composés nitriles : un révélateur de la structure des polyacrylonitriles." Grenoble 1, 1993. http://www.theses.fr/1993GRE10115.
Full textNicolas, Christophe. "Spectrométrie de haute précision dans l'infrarouge par transformation de fourier et par diode laser asservie en fréquence." Phd thesis, Université Paris Sud - Paris XI, 1985. http://pastel.archives-ouvertes.fr/pastel-00716502.
Full textMondet, Jean. "Etude des paramètres de surface de la calotte polaire antarctique, dans les domaines spectraux du visible et du proche infrarouge, à partir des données de l'instrument de télédétection POLDER." Phd thesis, Grenoble 1, 1999. http://tel.archives-ouvertes.fr/tel-00766029.
Full textRies, Michel. "Synthese et reactivite de clusters heterometalliques contenant le ligand assembleur ph : :(2)pch::(2)pph::(2)." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13208.
Full textHathurusinghe, Dewage Prabuddha Madusanka. "The Application of Two Fluid Model to IR Spectra of Heavy Fermions." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1541588399996827.
Full textKnight, Cheryl Lynn. "Application of IR and NMR spectroscopy to certain complexes of 8-hydroxyquinoline and 8-aminoquinoline." Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/22001.
Full textHumbert, François. "Contribution à l'effet de solvant : Étude expérimentale et théorique du comportement des intensités intégrées en spectroscopie infrarouge." Nancy 1, 1987. http://www.theses.fr/1987NAN10188.
Full textSassi, Zina. "Etude des spectres vibrationnels et des propriétés électriques des hexahydridoaluminates alcalins Li3AlHnD6-n n=(0,1,2,4,5,6) et de Na3AlH6." Lyon, INSA, 1988. http://www.theses.fr/1987ISAL0024.
Full textCaignol, Elisabeth. "Etudes structurales et spectroscopiques des fluorures litlzr : :(5)f::(22) et bizr::(3)f::(15)." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF21083.
Full textStepanian, S. G., A. Yu Ivanov, and L. Adamowicz. "Effect of low-temperature argon matrices on the IR spectra and structure of flexible N-acetylglycine molecules." AMER INST PHYSICS, 2016. http://hdl.handle.net/10150/622884.
Full text