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Showing 1 to 19 of 19 for “"Electronic spectroscopy."”.
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Toward pure electronic spectroscopy
… of the Rydberg system of CaF and developing Pure Electronic Spectroscopy. The Rydberg system of CaF possesses a paradigmatic character due to its strongly polar ion-core. The first characterization of the Stark effect in a Rydberg system of this nature is presented here, and a diagnostic …
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Electronic Spectroscopy, Photochemistry, And Reactivity Of Isoprene-Derived Criegee Intermediates
… 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 determine the angular and velocity distributions of the O-atom products …
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Electronic spectroscopy of flavins in a cryogenic 22 - pole ion trap
… flavins. This dissertation deals with the electronic photodissociation spectroscopy of cryogenically cooled flavins. The optical spectra are recorded with a tandem mass spectrometer coupled to a cryogenic 22 - pole ion trap and an electrospray ionization source. Here, the first …
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High Resolution Electronic Spectroscopy of Substituted Benzenes: Rotational Analyses and Stark Effects
Made available in DSpace on 2014-12-10T23:01:15Z (GMT). No. of bitstreams: 1 7212196.pdf: 2800799 bytes, checksum: 0fc8b2d9f906e62709d6f0bbfd6f3d9d (MD5) Previous issue date: 1971
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Coherence and Singlet Fission of TIPS-Pentacene Probed by Two-dimensional Electronic Spectroscopy
Two-dimensional electronic spectroscopy (2DES) is a type of ultrafast pump-probe (PP) spectroscopy with high time resolution and broadband pump and probe pulses. The high time resolution makes 2DES ideal for tracking ultrafast processes, and the broadband pump and probe allows 2DES to detect …
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Absolute molecular electronic spectroscopy at UV and soft X-Ray energies by hihg-energy electron impact
Dipole (e,e) spectroscopy has been used to determine absolute photoabsorption oscillator strengths (cross sections) for electronic excitation of CC14, CH3OH, NH3, CH3NH2, (CH3)2NH, and (CH3)3N at energy resolutions in the range 0.048-1.0 eV fwhm. These data have been obtained in the valence, and …
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An investigation of medium effects on the one and two-dimensional electronic spectroscopy of chlorophyll a
… has always had a particular relevance in spectroscopy because of its possible applications in light harvesting and energy storage. Since the light-harvesting pigment-protein complexes have this functional role in nature, many of studies have been focused on understanding photophysical …
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Shedding Light on Biological and Ecological Function
Electronic spectroscopy is a technique which can be used to understand inter- and intra- molecular interaction, structure, coloration and function within biological and ecological systems. Herein, electronic spectroscopy will be utilized to evaluate novel fluorescence probes for studies of …
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Multidimensional Spectra from Classical trajectories
Multidimensional spectroscopy plays an important role in determining the dynamical and structural properties of chemical and biological systems. Exact quantum dynamical calculations for large complex systems are difficult. That opens the window for approximations to quantum dynamics to incorporate …
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Charge Carrier Relaxation in Halide Perovskite Semiconductors for Optoelectronic Applications
… carrier thermalization processes using 2D electronic spectroscopy and extract characteristic carrier thermalization times from below 10 fs to 85 fs. We then investigate the early-time photoluminescence emission during carrier cooling. We observe that the luminescence signal shows a rise …
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Ultraviolet and Infrared Spectroscopy of Synthetic Foldamers, Aib Homopeptides, and Solvated 1,2-Diphenylethane in the Gas Phase
… Single-conformation ultraviolet and infrared spectroscopy techniques are then used to probe these systems and investigate their electronic properties and uncover their intrinsic conformational preferences in the gas phase.</p> <p>Model β/γ-peptides known as synthetic foldamers and …
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Pulsed molecular beam cavity microwave Fourier transform spectroscopy of some fundamental van der Waals dimers and trimers
… not only confirmed the structure obtained from electronic spectroscopy, but has also provided a reliable estimate of the ³⁵Cl nuclear quadrupole coupling constant in the free chlorine molecule. In the microwave investigation of four mixed rare gas dimers, the newest available mixed rare gas pair …
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Identification of natural product stereochemistry via calculation of ECD spectra
… and NMR experiments as well as the standard electronic spectroscopy experiments (UV-Vis, ECD, etc.) or less widespread vibrational and rotational spectroscopy experiments (VCD, ROA, etc.) can be used, often in combination. However, sophisticated synthetic strategies or difficult isolation of …
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Design, construction, and characterization of an ultra-sensitive, high-precision fast ion-beam spectrometer for the study of molecular ions
… cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) technique in conjunction with a fast ion beam. Additionally, it is the first work outlining direct electronic spectroscopy in an ion beam. Direct spectroscopy of a fast molecular ion beam offers many advantages over …
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Design and fabrication of electron energy filters for room temperature inelastic electron tunneling spectroscopy
… such as FTIR and Raman are commonly used for electronic nose application. However, their application is limited by factors such as poor sensitivity, selectivity and non-portability. Inelastic electron tunneling spectroscopy (IETS) is an all electronic spectroscopy that has been extensively …
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Part I Synthesis and molecular Assemblies of d10 metal complexes bearing 9, 10-disubstituted anthracene ligand Part II Synthesis and spectroscopic studies of heterobimetallic platinum(II)-acetylide and platinum(0)-acetylene complexes
… the effect of metal-metal interaction on the electronic communicating ability of a??-Ca?!C-Pt-Ca?!C-a?? bridge were evaluated on the basis of the electrochemical behavior of a series of heterobimetallic platinum(II)-acetylide complexes. In addition, to search for complexes of low-lying MLCT …
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Quantitative, Photocurrent Multidimensional Coherent Spectroscopy
<p>Multidimensional coherent spectroscopy (MDCS) is a quickly growing field that has a lot of advantages over more conventional forms of spectroscopy. These advantages all come from the fact that MDCS allows us to get time resolved correlated emission and absorption spectra using very precisely …
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Construction and calibration of a custom time-of-flight mass spectrometer and its use in measuring the reaction kinetics of transition metal ion-organic interactions.
… expansions combined with time of flight spectroscopy. Ionization occurs in a large main chamber. The ions are separated via a kinetic energy pulse from a custom built linear particle accelerator. The revelatory hardware for our instrument is a microchannel plate detector (MCP). The MCP is …