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Luminescence of 2,5-bis(2-benzoxazolyl)hydroquinone Molecules
Adsorbed on Copper Island Film
1Chayka K., 1Moiseyenko
V., 2Mordzinski A.
1Dniepropetrovsk
National University, 13 Naukova St., 49050 Dniepropetrovsk, Ukraine
2Institute
of Physical Chemistry, Polish Academy of Science, 01-224 Warsaw, Poland
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Characteristics of photoluminescence spectra of polycrystalline 2,5-bis(2-benzoxazolyl)hydroquinone
(BBHQ) adsorbed on a copper island film have been studied in the conditions
of laser excitation. The reflectivity, transmission and luminescence spectra
have been measured in the temperature range of 600 – 800 K for a number
of film thicknesses and annealing conditions. It has been found that annealing
of the films induces changes in the islands’ morphologies. The spectral
luminescence characteristics have been compared with those peculiar for
the BBHQ solution in 3-metylpentan, for the BBHQ samples adsorbed on pure
plane-parallel quartz plates and for the samples contained in quartz glass
cell. The results have been used for interpretation of the spectra and
estimation of the average amplification factor and the characteristics
of molecular excitons in the crystals under investigation.
PACS: 78.55Kz
Keywords: luminescence spectra, intramolecular excited-state proton
transfer, SERS-active substrates, copper island film, molecular excitons
doi 10.3116/16091833/6/4/128/2005 |
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