Thermoluminescence of hydroxy and aminobenzoic acids
1972; Elsevier BV; Volume: 5; Issue: 6 Linguagem: Inglês
10.1016/0022-2313(72)90005-1
ISSN1872-7883
AutoresF. Aramu, V. Maxia, Maria Paola Serra, G. Spano,
Tópico(s)Molecular Junctions and Nanostructures
ResumoThe thermoluminescence glow spectra of ortho, meta and para-hydroxy and aminobenzoic acids have been investigated as obtained through UV excitation at low temperature. The trap depths are found to range from 0.13-0.39 eV for the various acids, while the trap density turns out to be highest in the ortho-forms. This feature is ascribed to the poorer stability of the dimers in the ortho-acids, which produces a larger concentration of lattice defects. This conclusion is substantiated by means of different experimental evidences which provide further information on the lattice bonds, such as, for instance, the fundamental absorption energies. A possible interpretation for the thermoluminescent defect structure is suggested.
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