Nanocomposite of europium organic framework and quantum dots for highly sensitive chemosensing of trinitrotoluene

作者：Kaur Rajnish; Paul A K; Deep Akash^*

来源：Forensic Science International, 2014, 242: 88-93.

DOI：10.1016/j.forsciint.2014.06.028

• Metal organic frameworks
• Europium
• Quantum dots
• Nanocomposite
• Chemosensing
• Trinitrotoluene

Luminescent metal-organic frameworks (MOFs) are considered as next-generation sensor materials for small molecules and explosives. In the present work, a nanocomposite of luminescent europium organic framework (EuOF) and CdSe quantum dots (QDs) has been first time investigated for photoluminescence (PL) based highly sensitive detection of trinitrotoluene (TNT). The nanocomposite EuOF/QD has been synthesized by initiating the growth of EuOF in the presence of QDs. The successful synthesis of the product has been verified with the help of electron microscopy, X-ray diffraction analysis, and surface area measurements. Compared to EuOF alone, the EuOF/QD nanocomposite offers reproducible and stable measurements. The linear range of PL quenching based detection of TNT with EuOF/QD nanocomposite is 5-1000 ppb with the detection limit of 3 ppb. The detection of TNT with EuOF/QD is selective with respect to some other investigated aromatic compounds, such as phenol, o-cresol, toluene, benzene, nitrobenzene and nitrophenol.

• 出版日期2014-9