Up-conversion properties of lanthanide-organic frameworks and how to track ammunitions using these materials

Nenhuma Miniatura disponível

Data

2012-01-01

Autores

Weber, Ingrid T.
Terra, Idelma A. A.
de Melo, Adenaule J. G.
Lucena, Marcella A. de M.
Wanderley, Kaline A.
Paiva-Santos, Carlos de O. [UNESP]
Antonio, Selma G. [UNESP]
Nunes, Luiz A. O.
Paz, Filipe A. A.
de Sa, Gilberto F.

Título da Revista

ISSN da Revista

Título de Volume

Editor

Royal Soc Chemistry

Resumo

This manuscript reports the first example of up-conversion properties involving Yb3+ and Tb3+ ions in five isostructural Lanthanide-Organic Frameworks (LnOFs), herein designated as UCMarker-1 to UCMarker-5, respectively, and their application as optical probes for the identification of gunshot residues (GSRs) and the ammunition encryption procedure. The excitation of the Yb3+2 F-7/2 <-> F-2(5/2) transition (980 nm) at room temperature leads to visible up-conversion (UC) emission of Tb3+ D-5(4) -> F-7(J). The GSR and lead-free primer residues are easily identified upon UV radiation (lambda = 254 nm). These results prove that the exploration of LnOFs to identify GSR is attractive for the identification of ammunition origins or caliber recognition.

Descrição

Palavras-chave

Como citar

Rsc Advances. Cambridge: Royal Soc Chemistry, v. 2, n. 7, p. 3083-3087, 2012.