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Showing 1 to 20 of 67 for “"Fluorescence spectra"”.
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Raman and fluorescence spectra of azabenzenes
… peaks were measured and corrected for the spectral responses of the Raman instruments. The ratio, <sup>I</sup>��<sub>10a</sub>/<sup>I</sup>��<sub>4</sub>, increases by a factor of 8 as the frequency increases over this range.</p> <p>The primary approximation used in testing three …
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Computer-Assisted Structural Interpretation of Fluorescence Spectra
Made available in DSpace on 2014-12-13T20:10:00Z (GMT). No. of bitstreams: 1 7709105.pdf: 5112112 bytes, checksum: e030d0f9d5ce305138c3f173e04d5f91 (MD5) Previous issue date: 1976
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Infrared Laser Excitation and Fluorescence Spectra: A Study of Intramolecular Vibrational Energy Relaxation
Infrared fluorescence measurements have been used to determine the presence or absence of intramolecular vibrational relaxation (or more precisely state mixing) from an excited C-H stretch in twenty three representative molecules varying in size from methane to norbornene. Included are aliphatic …
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Structural Characterization of Liquid-Chromatographic Effluents via Reverse File-Searching of Fluorescence Spectra
… the technique of liquid chromatography, fluorescence detection and computerized file-searching to produce a new approach to mixture analysis. The technique operates by separating mixture components in a liquid-chromatograph and submitting them sequentially to a high-performance …
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Gas phase vacuum-ultraviolet (vuv) spectroscopy of small halogenated polyatomic molecules
… national source located at Daresbury Cheshire. Fluorescence spectra were taken using the newly commissioned Wadsworth monochromator on beamline 3.1 of the Daresbury synchrotron radiation source. Dispersed florescence spectra were taken using a newly developed fluorescence apparatus incorporating …
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Picosecond Time-Resolved Fluorescence Depletion Spectroscopy of Fluorene: IVR in the Excited Electronic State
… we have developed known as the time resolved fluorescence depletion technique. Fluorescence depletion decays and dispersed fluorescence spectra of 19 vibronic features of fluorene are presented. The decays show a progression of dynamic behavior including stationary behavior at low densities of …
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Gallium-based Ultraviolet Nanoplasmonics
… sections are larger and do not overlap fluorescence spectra. UV plasmonics also benefit from high spatial resolution and low penetration depth. However, an appropriate UV plasmonic material must be identified.</p><p>We proposed and demonstrated that gallium is a highly-promising and …
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Infrared Photon Initiated Conformer Interconversion, Fourier Transform Microwave Spectroscopy of Hydrogen Bonded Trimers, and Study of Conformer Cooling in Supersonic Expansions
… (methyl nitrite) than IR photon energies, IR fluorescence spectra showed conformational interconversion occurred (did not occur). For the first time, well defined energy in collisionless conditions was deposited in a ground electronic state molecule with subsequent intramolecular energy flow …
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Hartley transform based algorithm for the qualitative and quantitative analysis of multi-component mixtures with the use of emission excitation matrices
… the reverse search of a compressed reference spectral library for the identification of possible components of the mixture and the method of Non-Negative Least Squares for the quantification of the components. A number of techniques for pre-processing of three dimensional fluorescence spectra …
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Photoassociative excitation spectroscopy of excimer molecules
… transitions, bound $\gets$ free excitation spectra contain more structure than the bound $\to$ free fluorescence spectra for the same molecules, therefore containing more information about the potential surfaces. Unique properties of the photoassociative excitation spectroscopy technique are …
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Precursors for perylene diimide dendrimers : synthesis and photophysics
… photophysics in solutions was studied by UV and fluorescence spectra as a function of added trifluoroacetic acid (TFA). Previous work in laboratory has demonstrated that TFA can greatly enhance the fluorescence yield of related compounds, either by reducing intramolecular quenching or breaking up …
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High-resolution spectroscopic investigations of rovibrational state mixing in ground electronic states
… is investigated by the technique of infrared fluorescence, utilizing a high resolution (0.001 cm$\sp{-1}$) Optical Parametric Oscillator to obtain fluorescence excitation spectra and dispersed fluorescence spectra of single molecular eigenstates.
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Excited state proton transfer in 2-substituted benzothiazoles
… and temperature. Measurements of absorption and fluorescence spectra and fluorescence decay profiles under these various conditions have been combined with theoretical calculations to arrive at an understanding of the excited state behaviour of HBT and derivatives. An investigation has been made …
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Fluorescence in reef corals
Fluorescence can be a powerful tool for probing biological systems. Prior measurements from Caribbean corals identified five fluorescing pigments in reef corals. In this thesis I study coral fluorescence spectra. I wanted to learn if fluorescence could be useful for large scale mapping and …
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Spectral and Spatial Heterogeneity in Molecular Assemblies of Amino Styryl Pyridinium Dyes
… a red shift of the emission band. The far field fluorescence of Langmuir-Blodgett (LB) films of I is spectrally heterogeneous displaying bands assigned to monomer and various aggregated (n-mer) species. Band assignment is based upon the interaction integral, which predicts the perturbation to the …
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Infrared Studies of Intramolecular Rovibrational Relaxation (Kinetics, Energy Transfer)
Infrared fluorescence data is presented which demonstrates the extent of intramolecular vibrational relaxation from the CH stretching modes of several organic molecules. The molecules are isolated and cooled in a pulsed supersonic expansion. The infrared fluorescence is collected and dispersed …
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Geometric and optical transformations of supramolecular host-guest amphiphiles
… the host-guest nanostructure by TEM, UV-Vis, and fluorescence spectra.
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Spectroscopic investigations of new glass-ionomer dental cements
… Fuji II glass with various polyacids. Emission spectra were collected and analyzed. The differences of the setting reactions (due to polysalt formation) were explained based on the concentration and availability of hydrogen ions from the polyacids with different structures.;Commercially …
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Colloidal Cerium Oxide Nanoparticle: Synthesis and Characterization Techniques
Fluorescence spectra and UV-Vis absorption spectra are collected on cerium oxide nanocrystalline particles. While CeO2 is the stable form of bulk cerium oxide, ceria nanoparticles exhibit a nonstoichiometric composition, CeO2-γ, due to the presence of oxygen vacancies and the formation of Ce2O3 at …
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Identification and Characterization of Enzymes Involved in Post-translational Modifications of Phycobiliproteins in the Cyanobacterium Synechocystis sp. PCC 6803
… cpeT-like gene (cpcT). Through absorbance and fluorescence spectra, it was determined that CpcS and CpcU together catalyze the addition of phycocyanobilin to Cys-82 on betaphycocyanin in vitro and that CpcT is a lyase that adds phycocyanobilin to Cys-153 on betaphycocyanin.
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