title: Nanocomposite of europium organic framework and quantum dots for highly sensitive chemosensing of trinitrotoluene.
abstract: 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.
authors.affiliation: Central Scientific Instruments Organisation (CSIR-CSIO), Sector 30 C, Chandigarh 160030, India; Academy of Scientific and Innovative Research, CSIR-CSIO, Sector 30 C, Chandigarh 160030, India.
authors.forename: Rajnish
authors.initials: R
authors.lastname: Kaur
authors.affiliation: Central Scientific Instruments Organisation (CSIR-CSIO), Sector 30 C, Chandigarh 160030, India; Academy of Scientific and Innovative Research, CSIR-CSIO, Sector 30 C, Chandigarh 160030, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Paul
authors.affiliation: Central Scientific Instruments Organisation (CSIR-CSIO), Sector 30 C, Chandigarh 160030, India; Academy of Scientific and Innovative Research, CSIR-CSIO, Sector 30 C, Chandigarh 160030, India. Electronic address: dr.akashdeep@csio.res.in.
authors.forename: Akash
authors.initials: A
authors.lastname: Deep
keywords: Chemosensing; Europium; Metal organic frameworks; Nanocomposite; Quantum dots; Trinitrotoluene