Journal ArticleDOI
Migration of Excimer Energy in Pyrene Crystal
Masao Tomura,Yoshihiro Takahashi +1 more
TLDR
In this paper, the decay times of excimer emission of pure and perylene doped pyrene crystals were measured by a pulse method and, thereby, the probability of energy transfer from the excimer to doped perylene molecules was obtained.Abstract:
The decay times of excimer emission of pure and perylene doped pyrene crystals were measured by a pulse method and, thereby, the probability of energy transfer from the excimer to doped perylene molecules was obtained. Furthermore, its temperature dependence was obtained. By the analysis of these results the diffusion coefficient D of the excimer migration in the pyrene crystal was obtained as D = D 0 exp (- E / k T ) ( D 0 =1.0×10 -2 cm 2 sec -1 and E =0.071 eV). It was confirmed that the excimer could migrate like an exciton in the pyrene crystal.read more
Citations
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Journal ArticleDOI
Preparation and photophysical characterisation of Zn-Al layered double hydroxides intercalated by anionic pyrene derivatives†
TL;DR: In this article, the authors used powder X-ray diffraction at different temperatures, thermogravimetric analysis, FTIR, 13C{1H} CP/MAS NMR and photoluminescence techniques.
Journal ArticleDOI
Electronic energy transfer at semiconductor interfaces. I. Energy transfer from two-dimensional molecular films to Si(111)
TL;DR: In this article, the pyrene fluorescence decays from submonolayers of pyrene separated from Si(111) by Xe spacer layers are measured as a function of spacer thickness (17-200 A), pyrene coverage, and emission wavelength.
Journal ArticleDOI
On low temperature fluorescence of perylene crystals
TL;DR: In this article, a new crystal state (Y-state) which is populated independently of the high temperature excimer (E-state), called Y-state, is introduced.
Journal ArticleDOI
The spectroscopy and photochemistry of the excimer-emitting 9-cyanoanthracene crystal; The importance of multiphonon processes
TL;DR: In this article, a study of the spectroscopy and photochemistry of crystalline 9-cyanoanthracene is reported, and the experimental observations are in good agreement with the predictions of theories based on the strong exciton-phonon coupling.
Journal ArticleDOI
Monomer Emissions in Pyrene Crystals
Yoshihiro Takahashi,Masao Tomura +1 more
TL;DR: In this paper, an emission at shorter wavelength than the excimer emission band at room temperature was found to originate from the intrinsic monomer structure in the crystal surface, and the transfer probabilities of the excitation energies corresponding to the new emission at low temperature and the emission at short wavelength more similar to that of excimer to doped perylene molecules were observed by a pulsed method and their temperature dependences were obtained.
References
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Journal ArticleDOI
A Theory of Sensitized Luminescence in Solids
TL;DR: In this article, the resonance theory of Forster, which involves only allowed transitions, is extended to include transfer by means of forbidden transitions which, it is concluded, are responsible for the transfer in all inorganic systems yet investigated.
Journal ArticleDOI
Effects of Diffusion on Energy Transfer by Resonance
Mario Yokota,Osamu Tanimoto +1 more
TL;DR: In this paper, the effects of diffusion on energy transfer between molecules are considered by using two methods: scattering length method and the Pade approximant with the diffusion constant as the expansion parameter.
Journal ArticleDOI
`Excimer' Fluorescence. II. Lifetime Studies of Pyrene Solutions
TL;DR: In this article, the authors measured the concentration dependence of the rise and decay time characteristics of the monomer and excimer fluorescence of deoxygenated solutions of pyrene in cyclohexane at temperatures from 293 to 340 °K.
Journal ArticleDOI
Influence of Resonance Transfer on Luminescence Decay
TL;DR: In this paper, the effects of dipole resonance transfer on the population and decay of excited donor molecules are discussed and the limitation of previous treatments of this problem to flash excitation is demonstrated.
Journal ArticleDOI
'Excimer' Fluorescence. IX. Lifetime Studies of Pyrene Crystals
TL;DR: In this article, a reproducible criterion of purity for crystalline pyrene was established, based on the increase of the excimer fluorescence lifetime with increasing purity, and the authors showed that the excitons in organic molecular crystals are localized and identical with singlet-excited molecules and that they migrate by a hopping mechanism rather than through a hypothetical exciton band.