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Showing 1 to 17 of 17 for “"Excimers"”.
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Rare gas alkali ionic excimers
… are established as a new class of ionic excimers which emit in the vacuum ultraviolet (VUV) regime of the electromagnetic spectrum. Temporal and spectral characteristics of these species with (XeRb)$\sp{+}$ at 164 nm and (XeCs)$\sp{+}$ at 160 nm have been investigated by soft x-ray …
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Bound-Free Emission and its Application to Broadband Optical Amplifiers
The potential for zinc and cadmium excimers to act as ultraviolet broadband ampli er media is investigated. A detailed presentation of the theory of bound-free emission and free-bound absorption is given. New internuclear potential curves for the B1 + u upper states of both cadmium and zinc …
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Photophysical properties of pyrene, 2,7 diazapyrene and 1,3-bis(β-naphthyl)propane.
… pyrene and diazapyrene have been investigated. Excimers, dimeric species which are associative in an excited electronic state and dissociative in their ground state, have long been established and play an important role in many areas of photochemistry. My work here focuses on the luminescence …
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A Computational Investigation of the Photophysical, Electronic and Bonding Properties of Exciplex-Forming Van der Waals Systems
… were explained by calculation of Hg dimers, excimers and exciplexes formed with noble gases.
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Highly Luminescent Platinum Complexes for Light Emitting Devices and Bio-Imaging
… in solutions of higher concentration to form excimers. The excimers are emissive in their own right, and display broad, structureless emission bands at lower energy than the isolated molecules (monomers). The influence of substituents in the terdentate ligand and the identity of the coligand …
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Fluorination Effect on the Conformational Properties of Alkanes
… spectra indicate hydrocarbon dimers-models form excimers more efficiently than the fluorinated dimers suggesting the fluorinated chains are stiffer than the hydrocarbons. We conducted the temperature-dependent studies and quantified the conformational difference.
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Optical Processes in Xenon: Multiphoton Ionization and Ultraviolet Photodissociation of the Dimer Ion
… the role of Xe(,2)('+) in the formation of the excimers XeCl and Xe(,2)Cl has been examined.
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Studying Collagen with PyrATS: Pyrene-Appended Trimeric Systems
… When in close contact, pyrene units can form excimers that emit low-energy light. This allows for the study of several fundamental questions in collagen research using fluorescence spectroscopy, including concentration dependence, folding directionality, and local fraying, upon solutions that …
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Controlling the architectures and optical properties of conjugated polymer aggregates and films
… was previously proposed to form green-emitting excimers, we found that a small concentration of anthryl defects in the polymer emitted green fluorescence that was only noticeable when the polymer was in an aggregated state (otherwise the polymer was fluorescent blue). After elucidating the …
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Synthesis, Linear and Nonlinear Photophysical Characterization of Two Symmetrical Pyrene-terminated Squaraine Derivatives in Solution
… yields and relatively low tendency of forming excimers in several solvents. The nonlinear spectroscopic study revealed two-photon absorption cross section maxima greater than 10,000 GM (1 GM = 1 × 10-50 cm4 s/photon), which are improved values in comparison with the indole-based squaraine core. …
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Studies on Anthracene Tagged Oligonucleotides
… dynamics optimized structures. The formation of excimers in bis-anthracene systems as potential precursors to photo-ligated DNA duplexes was also studied.
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Diatomic excimer dynamics in microplasma lamps and alkali lasers
The dynamics of diatomic excimers - electronically excited molecules having dissociative ground states - generated in alkali-rare gas mixtures and low temperature microplasmas have been pursued and the experimental and computational results are presented here. This work focuses on the Cs-rare gas …
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Conjugated polymers and designed interfaces : conformational analysis and applications
… The emission has the characteristics of excimers with the improved fluorescence quantum yields. The transfer of the aligned aggregates to glass substrates is attempted and these excimer films undergo reorganization upon exposure to solvent vapors, which triggers the fluorescence color …
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Stimulated Raman scattering, lasing, and molecular energy transfer mechanisms in KXe probed by laser spectroscopy
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Dynamik und Energetik von Triplettexzitonen in konjugierten Polymeren und Molekülen
… Stärke der Ausbildung eines Triplett-Sandwich-Excimers variiert werden, bei dem die Carbazoleinheiten zweier Moleküle überlappen. Wegen des guten Wellenfunktionsüberlapps der Carbazoleinheiten ist bei diesem Excimer die Stabilisierungsenergie sehr hoch und kann daher durch ungewollten …
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Design, Synthesis and Characterisation of π-Extended Viologen-Based Molecular and Supramolecular Complexes with Cucurbit[n]urils
Viologens, 4,4'-bipyridinium dications (V$^{2+}$), have attracted much attention as electron mediators in a variety of photochemical, electrochemical and chemical processes ranging from catalysis, electrochromic devices to solar energy conversion and storage systems. % The different applications of …
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NEW NCN-PLATINUM(II) COMPLEXES WITH LUMINESCENT PROPERTIES
… nevertheless, the concurrent formation of excimers, participating in the luminescent properties, cannot be excluded. In the case of Pt1, the luminescence has been assessed also for the powders, both at Room and Low Temperature; furthermore, the X-ray crystal structure of the compound has …