Ukrainian Journal of Physical Optics 

Number  4, Volume 6,  2005

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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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