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Showing 1 to 19 of 19 for “"Matrix Isolation"”.
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ELECTRONIC MATRIX ISOLATION SPECTROSCOPIC STUDIES OF METAL ATOM PHOTOCHEMISTRY
… an ultraviolet-visible absorption and emission matrix isolation apparatus is described, (2) by employing this apparatus, molecular scale interactions of the 1:1 metal-water adduct are investigated utilizing electronic absorption spectroscopy, and (3) molecular orbital and electronic …
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A matrix isolation study of transition metal halides and their structure.
… thesis has concentrated on the formation and isolation of titanium, vanadium, palladium, and mercury halides, with emphasis on the fluorides.TiF, TiF2, TiF3, and TiF4 have all been isolated within an argon matrix and infrared spectra obtained. From the titanium isotope splitting pattern a bond …
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Matrix Isolation of Aryl(trifluoromethyl)carbenes, Heteroaryl(trifluoromethyl)carbenes and Phenylbis(trifluoromethyl)carbenes
We have isolated and studied 2-naphthyl(trifluoromethyl)carbene, 1-naphthyl(trifluoromethyl)carbene, 4-pyridyl (trifluoromethyl)carbene, 2-pyridyl(trifluoromethyl)carbene, 3-pyridyl (trifluoromethyl)carbene, 3-bromo-5-pyridyl(trifluoromethyl)carbene, meta-phenylbis(trifluoromethyl)carbene and …
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A Matrix Isolation Spectroscopic Investigation Into the Reaction Products of Vanadium Metal Atoms With Propene
… propene-3,3,3-d3) are investigated using FT-IR matrix isolation. The major product from the condensation of V atoms with propene at elevated mole ratios is found to be propane (C3H8), the production of which is seen to increase as concentration of propene increases. Additionally a matrix …
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A Matrix Isolation Spectroscopic Investigation of the Reaction Products of Transition Metal Centres With Ethene and Water
… and ethene isotopomers have been investigated by matrix isolation ultraviolet visible and Fourier transform infrared (FTIR) spectroscopy. When V is deposited into matrices of pure Ar, evidence for V and V2 are present in the UV-visible absorption spectra. Addition of trace amounts of ethene …
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A study of inter- and intramolecular interactions through neutron compton scattering and low temperature matrix isolation infrared spectroscopy
Matrix Isolation Infrared Spectroscopy has been proposed as an alternative for detection and quantification of site-specific isotopic signals. 4-hydroxy-3-methoxy benzaldehyde (vanillin) is used in an attempt to make use of its asymmetry and distinguish between the vibrations of its three …
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The Use of Matrix Isolation Spectroscopy in The Characterization of Octacarbonyl and The Charge Transfer Complex of Tetrathiofulvalene and Tetracyanoquinodimethan
Made available in DSpace on 2014-12-13T20:09:54Z (GMT). No. of bitstreams: 1 7624185.pdf: 5687665 bytes, checksum: 28f43299f858bb9c8a9705efd1f4041d (MD5) Previous issue date: 1976
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A synthetic and computational approach to the design of new photoactive organometallic materials.
… is followed by an outline of the techniques of matrix isolation and time-resolved infrared (TRIR) spectroscopy. The rapidly developing area of computational chemistry is then introduced. Specific emphasis is placed on the ab-intio and Density Functional Theory (DFT) levels of theory as well as …
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The structure of cyclic fatty acid monomers isolated from heated linseed oil and their effects on cultured aortic endothelial cells
… were confirmed using gas chromatography-matrix isolation-Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry. The CFAM were identified as 18-carbon diunsaturated structures containing cyclopentenyl and cyclohexenyl rings in various positions along the …
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Optical Pumping of Rubidium Spin in a Solid Argon Matrix
Using the matrix isolation technique we have trapped rubidium atoms inside a cryogenic solid argon crystal of thickness 200 µm. This weakly-interacting solid offers the experimental simplicity and high densities of solid-state systems, while allowing the implanted atoms to retain many of the …
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Conformational Analysis of Cyclohexandiols and Related Compounds
… conformation. 13C nmr, 1H nmr, solution i.r. and matrix isolation i.r. techniques have been used to determine the conformational structures in the cyclohexandiol series and the nature of the solvent interactions. Two types of solvent interaction have been identified, a hydrogen bonded interaction …
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Synthetic and mechanistic aspects of the reactions of α-diazosulfoxides
… preformed solutions of sulfines. Furthermore, matrix isolation experiments have shown that electrocyclisation of α-oxosulfines to oxathiiranes takes place and this verifies the proposed mechanisms for enol and disulfide formation. The introductory chapter includes a brief literature review of …
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Spectroscopic Studies of Molecular Conformations
… temperature and phase of these compounds (using matrix isolation techniques in some cases) have been interpreted in terms of conformational equilibria; table (1) summarises the results.<br/><br/>Low frequency vibrations have been assigned as torsions associated with either C-CH3 or =C-C= bonds. …
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The Interactions between Hydrogen Chloride and various Proton Acceptor Molecules in Low Temperature Inert Matrices
… the shift in the stretching vibration.<br/><br/>Matrix isolation methods were investigated by pulsed (PMI) and slow-spray-on (SSO) for samples of hydrogen chloride and propenenitrile (acrylonitrile or vinyl cyanide). A high temperature injection system was constructed for molecules of low …
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Studies on Methylaluminoxane Catalyst Activators
… and by combining infrared spectroscopy with the matrix isolation technique. Low temperature NMR experiments successfully led to the identification of the AlMe3·H2O adduct as the first intermediate, followed by formation of Me2AlOH, when THF was employed as a solvent. Another approach focused on …
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Gas-Phase Formation of Environmentally Persistent Free Radicals from Thermal Degradation of Catechol, Hydroquinone, Phenols and Tobacco
… (EPR), the technique of Low Temperature Matrix Isolation in which catechol, hydroquinone, phenols and Tobacco were pyrolyzed in both low and atmospheric pressures reactor that was directly connected to a liquid nitrogen-cooled cold finger located in the EPR cavity of a Bruker EPR …
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Optical and spin coherence properties of Rb atoms in solid neon for magnetic field sensing
… imaging of nuclear spins outside of the host matrix challenging.We propose a different type of magnetic field sensor utilizing a matrix isolation system. Alkali atoms implanted in rare-gas matrices have been proposed for quantum sensing, fundamental physics measurements, and dark matter …
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Infrared and Raman spectroscopic studies of matrix isolated amines
… to classify qualitatively and quantitatively the matrix isolated spectra of these molecules and subsequently to evaluate whether the method would prove sufficiently sensitive for the subsequent analysis of these malodorous substances in polluted atmospheres, and to compare the results with those …