Artículo
Enhancement of the intrinsic fluorescence of ZIF-8 via post-synthetic cation exchange with Cd2+ and its incorporation into PDMS films for selective sulfide optical sensing
Autor/es | Moscoso, Francisco G.
Rodríguez-Albelo, Luisa Marleny Ruiz-Salvador, A. Rabdel Lopes-Costa, Tânia Pedrosa Poyato, José María |
Departamento | Universidad de Sevilla. Departamento de Ingeniería y Ciencia de los Materiales y del Transporte |
Fecha de publicación | 2023-03 |
Fecha de depósito | 2023-02-17 |
Publicado en |
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Resumen | In this study, ZIF-8 MOF nanocrystals were synthesized and post-synthetically modified by applying different cation exchange strategies. Addition of cadmium nitrate in either methanol or DMF followed by either magnetic ... In this study, ZIF-8 MOF nanocrystals were synthesized and post-synthetically modified by applying different cation exchange strategies. Addition of cadmium nitrate in either methanol or DMF followed by either magnetic stirring or gentle heating led to the incorporation of a small amount of Cd (II) ions into the crystal structure in most cases, as clearly demonstrated by several characterization techniques including PXRD, SEM-EDS and FT-IR. This novel doped material exhibits a high fluorescence with the maximum emission wavelength at 444 nm upon excitation at 380 nm, which allows its use as an effective optical sensor. The sensing capability of the Cd-doped ZIF-8 material was demonstrated by its exposure to sulfide ions in aqueous solution. The fluorescence of the doped material was gradually quenched as the concentration of S2− was increased. Sensing devices based on mixed-matrix membranes (MMMs) were fabricated by using poly (dimethyl siloxane) (PDMS) as a hosting matrix for the Cd-doped ZIF-8 crystals, giving rise to fluorescent sensing films with fast and selective responses against a broad number of potential interferents. |
Agencias financiadoras | Spanish AEI/MCIN/10.13039/501100011033 within the Next Generation EU/PRTR funds project PCI2020-112241 (M-ERA.NET 2019 project 7106, SALMOS) Spanish AEI/MCIN/10.13039/501100011033 within the Next Generation EU/PRTR funds project PID2019-110430 GB-C22 (AD- LIGHT) ERDF and Andalusian CTEICU/JA in the framework of the Operative Programme FEDER- Andalucia 2014–2020 through project P20 01258 (objective 01) ERDF and Andalusian CTEICU/JA in the framework of the Operative Programme FEDER- Andalucia 2014–2020 through project UPO-1381028 (objective 1.2.3.) |
Identificador del proyecto | PCI2020-112241 (M-ERA.NET 2019 project 7106, SALMOS)
PID2019-110430 GB-C22 (AD- LIGHT) P20 01258 (objective 01) UPO-1381028 (objective 1.2.3.) |
Cita | Moscoso, F.G., Rodríguez-Albelo, L.M., Ruiz-Salvador, A.R., Lopes-Costa, T. y Pedrosa Poyato, J.M. (2023). Enhancement of the intrinsic fluorescence of ZIF-8 via post-synthetic cation exchange with Cd2+ and its incorporation into PDMS films for selective sulfide optical sensing. Materials Today Chemistry, 28 (101366). https://doi.org/10.1016/j.mtchem.2022.101366. |
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