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Showing 1 to 20 of 29 for “"UV-Vis spectra"”.

  1. ΣΥΝΘΕΣΗ, ΦΑΣΜΑΤΟΣΚΟΠΙΚΗ ΚΑΙ ΚΡΥΣΤΑΛΛΟΓΡΑΦΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΔΟΜΗΣ ΚΑΙ ΘΕΩΡΗΤΙΚΑ ΜΟΝΤΕΛΑ ΣΥΜΠΛΟΚΩΝ ΤΩΝ ΣΟΥΛΦΟΝΥΛΟΥΡΙΩΝ ΜΕ D8,D9 ΚΑΙ D10 ΜΕΤΑΛΛΟΙΟ...

    Χατζηδημητρίου, Αντώνιος, Hatzidimitriou, AntoniosΑριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)1990

    … ANALYSIS, MAGNETICALLY AND SPECTROSCOPICALLY (IR SPECTRA, UV-VIS SPECTRA, EPR SPECTRA, NMR SPECTRA, MASS SPECTRA), THERMAL ANALYSIS, X-RAY STRUCTURE ANALYSIS, THEORETICAL CALCULATIONS OF THE MOLECULAR STRUCTURE, CONDUCTOMETRIC AND POTENTIOMETRIC MEASUREMENTS OF THEIR SOLUTIONS IN MIXED SOLVENTS …

    greece Repository record

  2. Photochemistry of 5-Membered Heteroaryl(trifluoromethyl)carbenes in Low Temperature Matrices

    Ghimire, Rajendra2012

    … led us to a new realm of UV-vis transparent diazirines, which behave as normal diazirine photochemically, but have very weak n<em>f</em>à<em>f</em>x<em>f</em>nabsorptions which are not visible in experimental UV-vis spectra. Also, we were able to synthesize diazirine …

    unr Repository record

  3. Multi-Method Investigation of the Mechanism of Surfactant-Induced Chromatotropism of Metal-Chelometric Dye Complexes

    Ogawa, Mark KennethUniversity of Illinois at Urbana-Champaign2015

    … which certain surfactants change the ultraviolet-visible (UV-vis) spectroscopic properties of certain metal-dye complexes has been largely ignored in the chemical literature. In this manuscript a model is developed to describe this mechanism. Intramolecular forces among surfactant molecules and …

    uiuc Repository record

  4. Reactions of Congo Red and Azo Dye Congeners With Formaldehyde

    Garrett, Christine J.2025

    … exposed to formaldehyde, retention times and UV-Vis spectra were consistent with the identification of the unknown yellow product as the N-formyl product. Isolation of the yellow product from the reaction mixture with formaldehyde was successfully achieved with the half-dye analog of Congo red …

    iupui Repository record

  5. Spectral and Physicochemical Characteristics of nC60 in Aqueous Solutions

    Chang, XiaojunVirginia Tech2011

    … transmission electron microscopy (TEM), and UV-Vis spectroscopy. nC₆₀ produced in the presence of carboxylate differs from that produced in water alone (aq/nC₆₀) with respect to surface charge, average particle size, interfacial properties, and UV-Vis spectroscopic characteristics. …

    vt Repository record

  6. Green synthesis of silver nanoparticles using Moringa oleifera extracts and their evaluation against antibiotic resistant strains of escherichia coli and staphylococcus aureus

    Sinvula, SimasikuUniversity of Namibia2022

    … Synthesized AgNPs were characterized using UV-vis spectroscopy, fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Disc diffusion method was used for initial screening of antibacterial activities and their minimum inhibitory concentration (MIC) was …

    namibia Repository record

  7. Photodegradation of biopolymer doped with titanium dioxide (TiO2) as ultraviolet (UV) stabilizer

    Mohid, Siti RahmahUniversiti Tun Hussein Onn Malaysia2015

    … the resistance of the biopolymer to ultraviolet (UV) light exposure. The virgin oil (VO) and waste oil (WO) was converted into biomonomer. By adding biomonomer with an appropriate amount of 4, 4’-methylene diphenyl diisocyanate (MDI) and solvent, the virgin oil polymer (VOP) and waste oil polymer …

    uthm Repository record

  8. Photodegradation of biopolymer doped with titanium dioxide (TiO2) as ultraviolet (UV) stabilizer

    Mohid, Siti RahmahUniversiti Tun Hussein Onn Malaysia2015

    … the resistance of the biopolymer to ultraviolet (UV) light exposure. The virgin oil (VO) and waste oil (WO) was converted into biomonomer. By adding biomonomer with an appropriate amount of 4, 4’-methylene diphenyl diisocyanate (MDI) and solvent, the virgin oil polymer (VOP) and waste oil polymer …

    uthm Repository record

  9. Selective Laser-Induced Oxidation of Carbon Chain Molecules in Cryogenic Matrices

    Strelnikov, DmitryUniversität Heidelberg

    … of those carbon molecules which have known UV/VIS absorptions. For this purpose we trapped the molecules of carbon vapor in non-inert matrices(O2, Ar-O2). Upon matrix annealing, molecular growth took place leading to a mixture of linear carbon species up to C17. The output of an excimer-dye …

    heid-diss Repository record

  10. Cyanide-bridged polynuclear complexes

    Sheng, Tianlu

    … by X-ray single crystal determination, IR, UV-Vis and cyclic voltammograms, respectively. The three mixed valent dinuclear complexes display metal- metal charge transfer (MMCT) bands in the visible region. Some of MMCT properties in the complexes have been analyzed. The cyanide-bridged trans …

    freiburg-diss Repository record

  11. Identification of Molecules by Spectral Imaging

    Alshammari, Qamar2020

    <p>Spectral imaging is a powerful technique which uses the wavelength to identify/quantify the exact location and amount of the molecules. It facilitates the identification of materials and studying their properties through analyzing the way they interact with light. The study of light interaction …

    chapman Repository record

  12. Application of factor analysis to spectroscopic methods

    Brockwell, Timothy GrahamUniversity of Greenwich1992

    … The application of factor analysis to the UV-Vis spectra of a series (quaternary mixtures of transition metal ions is shown. The number of ions in the system is determined and the identities of the ions assigned using target testing. The effect of inadequate sampling intervals of the data …

    greenwich Repository record

  13. Quantum mechanical study of molecular switches : electronic structure, kinetics and dynamical aspects

    Dokić, JadrankaUniversität Potsdam

    … and quantitative appearance of calculated UV/Vis spectra, as well. Finally, an explicit treatment of a solid substrate was demonstrated for the conformational switching, by scanning tunneling microscope, of a 1,5-cyclooctadiene (COD) molecule at a Si(001) surface, treated by a cluster …

    potsdam-diss Repository record

  14. Electronic Spectroscopy, Photochemistry, And Reactivity Of Isoprene-Derived Criegee Intermediates

    Vansco, Michael Francis2020

    … Criegee intermediates exhibit broad ultraviolet-visible (UV-vis) spectra with strong absorption (ca. 10-17 cm2 molec-1). Electronic excitation of Criegee intermediates results in nonadiabatic coupling to repulsive potentials and prompt release of O 1D products. Velocity map imaging is used to …

    penn Repository record

  15. Chemical functionalization and modification of Au clusters

    Alyari, MaryamUniversity of Saskatchewan2021

    … of the reducing agent. Furthermore, based on UV-Vis spectroscopy, three absorption peaks at around 690, 440, and 390 nm were observed at 0.30 M of the reducing agent, which are spectroscopic fingerprints of Au25 NCs and are strongly suggestive of the formation of fluorenylmethyloxycarbonyl …

    sask Repository record

  16. Polyelectrolyte multilayers for plasmonics and picosecond ultrasonics

    Mitzscherling, SteffenUniversität Potsdam

    … of polyelectrolytes, whose ratio affects the spectral position of the LSP resonance. Measured UV-VIS spectra showed the shift of the LSP absorption peak as a function of the cover layer thickness of the particles. The data are modeled using an average dielectric function instead of the …

    potsdam-diss Repository record

  17. A STUDY OF THE ELECTRONIC PROPERTIES OF SOME HETEROCYCLIC COMPOUNDS AND THE THERMAL DECOMPOSITION OF METHYLATED THIOBUTYROLACTONES

    CHUA YEK TANN1995

    … corresponding polymers. From the photoelectron spectra, four bands corresponding to four ? molecular orbitals (MO) were located in the low energy region between 7 and 12eV. Careful examination of the Hel/Hell band intensity variations and band profiles showed that two of these orbitals were …

    nus Repository record

  18. Characterization and technical studies of semiconductor nanoclusters synthesized within polymer films

    Kane, Ravindra (Ravindra Shantaram), 1972-Massachusetts Institute of Technology1998

    … X-ray fluorescence, electron microscopy, and UV­Vis spectroscopy. The cluster size and hence its optical properties could be controlled by varying processing parameters such as the reaction temperature, the presence of coordinating bases, and the time of exposure to H2S. A model was developed …

    mit Repository record

  19. Implications For the Role of the Peroxoferric Intermediate In the Second Step of Nitric Oxide Synthase Derived From the Reactivity of P450-Cam With Camphor-5-Oxime and Characterization of the Heme Iron Coordination Structures of Tyrosine- and Histidine-Ligated Heme Enzymes Using Magnetic Circular Dichroism Spectroscopy

    Bandara, D.M. Indika

    … <p>Magnetic circular dichroism (MCD) and UV-Visible (UV-Vis) absorption spectroscopy have been used to characterize the heme-iron coordination structure of (A) several tyrosinate-ligated heme enzymes and (B) the high potential (HP) and low potential (LP) heme centers of the diheme …

    south-carolina Repository record

  20. Synthesis and characterisation of mononuclear and dinuclear rhenium carbonyl complexes

    Brennan, ClaireDublin City University2007

    … a blue shift of both the absorption and emission spectra when compared to [Re(CO)3(bpy)Cl]. Chapter Three is discusses the synthesis of the rhenium(I) tricarbonyl complexes of 3-(pyrazin-2-yl)-l,2,4-triazoles, analogous to those described in Chapter Two. The complexes were characterised by NMR and …

    dcu Repository record

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