Search results for "Ionization Energy"

showing 3 items of 83 documents

Electronic properties of poly(pyrrylene vinylenes): a theoretical approach

1993

Abstract We present a theoretical investigation of the electronic properties of poly(pyrrylene vinylene) and its methyl and methoxy derivatives by using the valence effective Hamiltonian (VEH) method. Theoretical calculations predict that the electronic properties of poly(pyrrylene vinylene) remain almost unaffected upon methyl substitution, while a noticeable lowering of ∼0.4 eV is obtained for the ionization potential and energy gap upon methoxy substitution. The VEH trends are in quantitative agreement with experimental data reported for poly(thienylene vinylene) derivatives.

Valence (chemistry)Materials scienceBand gapMechanical EngineeringMetals and AlloysCondensed Matter PhysicsPhotochemistryElectronic Optical and Magnetic Materialssymbols.namesakeMechanics of MaterialsMaterials ChemistrysymbolsPhysical chemistryIonization energyHamiltonian (quantum mechanics)Electronic propertiesSynthetic Metals
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Developments for resonance ionization laser spectroscopy of the heaviest elements at SHIP

2016

Abstract The experimental determination of atomic levels and the first ionization potential of the heaviest elements ( Z ⩾ 100 ) is key to challenge theoretical predictions and to reveal changes in the atomic shell structure. These elements are only artificially produced in complete-fusion evaporation reactions at on-line facilities such as the GSI in Darmstadt at a rate of, at most, a few atoms per second. Hence, highly sensitive spectroscopic methods are required. Laser spectroscopy is one of the most powerful and valuable tools to investigate atomic properties. In combination with a buffer-gas filled stopping cell, the Radiation Detected Resonance Ionization Spectroscopy (RADRIS) techniq…

YtterbiumNuclear and High Energy Physics010308 nuclear & particles physicschemistry.chemical_elementInstrumental chemistry01 natural sciencesAtmospheric-pressure laser ionizationchemistryExcited state0103 physical sciencesPhysics::Atomic PhysicsNobeliumLaser-induced breakdown spectroscopyIonization energyAtomic physics010306 general physicsSpectroscopyInstrumentationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Energy level determination of purine containing blue light emitting organic compounds

2018

Organic light emitting diodes (OLED) have found their applications in the mobile and TV screens. Till now the commercially available diodes are made by expensive thermal evaporation in a vacuum. The costs of OLED fabrication could be decreased by applying low-cost wet casting methods, for example, spin-coating. In this work, we have studied a group of blue light emitting purine derivatives which could potentially be used in OLEDs. The advantage of these compounds is their ability to form amorphous thin films from solutions. All the thin films were prepared by the spincoating method from chloroform solution on ITO glass. The position of hole and electron transport energy levels is important …

purinechemistry.chemical_classificationMaterials sciencePhotoconductivityAnalytical chemistryphotoelectron emission02 engineering and technologyElectron acceptor010402 general chemistry021001 nanoscience & nanotechnology7. Clean energy01 natural sciencesElectron transport chain0104 chemical sciencesAmorphous solidOLEDchemistryElectron affinity:NATURAL SCIENCES:Physics [Research Subject Categories]OLEDphotoconductivityenergy levelsIonization energyThin film0210 nano-technologyOrganic Electronics and Photonics: Fundamentals and Devices
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