Citation

Lucena MA, Oliveira MF, Arouca AM, Talhavini M, Ferreira EA, Alves Junior S, Veiga-Souza FH, Weber IT. ACS Appl. Mater. Interfaces 2016; 9(5): 4684-4691.

Copyright

(Copyright © 2016, American Chemical Society)

DOI

10.1021/acsami.6b13474

PMID

27936564

Abstract

The 3D metal-organic framework (MOF) [Eu(BTC)] (where BTC = trimesic acid) was synthetized in 20 minutes by a microwave-assisted hydrothermal method with a yield of 89%. A structural and spectroscopic study, performed by X-ray diffraction, thermogravimetry and photoluminescence spectroscopy, showed that this framework has high crystallinity, thermal stability and luminescence. This MOF had a red-orange luminescence when excited with UV radiation (λ = 254 nm) and a high potential for use as a luminescent marker for gunshot residues (GSR). When added to 9-mm non-toxic ammunition (NTA), it greatly improved quality of the crime scene investigation, allowing for direct visualization of the luminescent GSR on the shooter's hand and firearm and at the firing range using only a portable UV lamp. The marked luminescent GSR (LGSR) was easily collected and characterized by non-destructive techniques, including VSC and SEM/EDS, wherein the presence of Eu3+ ions was confirmed. Furthermore, the oral acute toxicity of this MOF was assessed in adult female Wistar rats using the OECD 423 guidelines. This study classified the MOF [Eu(BTC)] in a less toxic GHS category (category 5), with an LD50 of 5000 mg/kg, ensuring a wide security range for its application.

Language: en