Integration of Metal-Organic Polyhedra onto a Nanophotonic Sensor for Real-Time Detection of Nitrogenous Organic Pollutants in Water
Calvo Lozano, Olalla (Institut Català de Nanociència i Nanotecnologia)
Hernández-López, Laura (Universitat Autònoma de Barcelona. Departament de Química)
Gomez, Leyre (Institut Català de Nanociència i Nanotecnologia)
Carné-Sánchez, Arnau (Universitat Autònoma de Barcelona. Departament de Química)
von Baeckmann, Cornelia (Universitat Autònoma de Barcelona. Departament de Química)
Lechuga, Laura M (Institut Català de Nanociència i Nanotecnologia)
Maspoch Comamala, Daniel (Universitat Autònoma de Barcelona. Departament de Química)

Date:	2023
Abstract:	The grave health and environmental consequences of water pollution demand new tools, including new sensing technologies, for the immediate detection of contaminants in situ. Herein, we report the integration of metal-organic cages or polyhedra (MOCs/MOPs) within a nanophotonic sensor for the rapid, direct, and real-time detection of small (<500 Da) pollutant molecules in water. The sensor, a bimodal waveguide silicon interferometer incorporating Rh(II)-based MOPs as specific chemical receptors, does not require sample pretreatment and enables minimal expenditure of time and reagents. We validated our sensor for the detection of two common pollutants: the industrial corrosion inhibitor 1,2,3-benzotriazole (BTA) and the systemic insecticide imidacloprid (IMD). The sensor offers a fast time-to-result response (15 min), high sensitivity, and high accuracy. The limit of detection (LOD) in tap water for BTA is 0. 068 μg/mL and for IMD, 0. 107 μg/mL, both of which are below the corresponding toxicity thresholds defined by the European Chemicals Agency (ECHA). By combining innovative chemical molecular receptors such as MOPs with state-of-the-art photonic sensing technologies, our research opens the path to implement competitive sensor devices for in situ environmental monitoring.
Grants:	European Commission 754510 Agencia Estatal de Investigación PID2019-108105RA-I00 Agencia Estatal de Investigación SEV-2017-0706c Agencia Estatal de Investigación RYC2020-029749-I Agencia Estatal de Investigación EUR2021-121997
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Metal−organic polyhedra ; Nanophotonic sensor ; Interferometer ; Benzotriazole ; Imidacloprid ; Environmental monitoring
Published in:	ACS applied materials & interfaces, Vol. 15, Issue 33 (August 2023) , p. 39523-39529, ISSN 1944-8252

DOI: 10.1021/acsami.3c07213
PMID: 37566722

7 p, 3.0 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles