期刊
RSC ADVANCES
卷 2, 期 7, 页码 3083-3087出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ra01214f
关键词
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资金
- CNPq (INCT/INAMI, RHINCT/INAMI) [CNPq-550388/2007-9]
- PRONEX-FACEPECNPq [APQ-0859-1.06/08]
- FCT [PTDC/QUI-QUI/098098/2008-FCOMP-01-0124-FEDER-010785]
- CETENE [D10A-XRD2-10164]
- LNLS [D10A-XRD2-10164]
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.
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