Heterogeneous chemiluminescence of crystalline phosphors in products of dissociation of sulfur dioxide

V. V. Styrov, N. D. Tolmatcheva, Yu I. Tyurin, S. H. Shygalugov

Research output: Contribution to journalArticle

Abstract

A luminescence has been revealed for the first time when SO is oxidized on the Y2O2S-Eu surface. Kinetic and spectral characteristics of heterogeneous chemiluminescence (HCL) have been studied. A model explaining the features of HCL has been proposed. In addition to reactions of adsorption, oxidation, and desorption, this model takes into consideration the reactions of the atomic-molecular exchange O + SO2-L → SO-L + O2 and dissociation SO2-L + Vas → SO-L, where L is the lattice symbol, Vas is the vacancy coming to the surface by diffusion. A mechanism of heterogeneous chemiluminescence has been discussed. It comprises the energy transfer to the center of luminescence according to the reaction SO2 e-L + Eu3+ → SO2-L + (Eu3+)e; (Eu3+)e → Eu3+ + hv, where SO2 e-L is the electron-excited SO2-L molecule. The spectrum of HCL Y2O2S-Eu is linear being typical of intracenter transitions in the f-shell of Eu3+. The lines of CHL are broadened as compared to the lines of photoluminescence.

Original languageEnglish
Pages (from-to)669-680
Number of pages12
JournalSurface Investigation X-Ray, Synchrotron and Neutron Techniques
Volume16
Issue number4
Publication statusPublished - 2001

    Fingerprint

ASJC Scopus subject areas

  • Surfaces and Interfaces

Cite this