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Title: MOF-Based Materials with Sensing Potential: Pyrrolidine-Fused Chlorin at UiO-66(Hf) for Enhanced NO2 Detection
Authors: Queirós, Carla
Moscoso, Francisco G.
Almeida, José
Silva, Ana M. G.
Sousaraei, Ahmad
Cabanillas-González, Juan
Ribeiro Carrott, Manuela
Lopes-Costa, Tânia
Pedrosa, José M.
Cunha-Silva, Luís
Editors: Song, Yonghai
Xu, Fugang
Keywords: N-methylpyrrolidine-fused chlorin
metal-organic framework
optical sensor
NO2 sensing
Issue Date: 1-Dec-2022
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
Citation: Queirós, C.; Moscoso, F.G.; Almeida, J.; Silva, A.M.G.; Sousaraei, A.; Cabanillas-González, J.; Ribeiro Carrott, M.; Lopes-Costa, T.; Pedrosa, J.M.; Cunha-Silva, L. MOF-Based Materials with Sensing Potential: Pyrrolidine-Fused Chlorin at UiO-66(Hf) for Enhanced NO2 Detection. Chemosensors 2022, 10, 511.
Abstract: An efficient strategy to develop porous materials with potential for NO2 sensing was based in the preparation of a metal-organic framework (MOF), UiO-66(Hf), modified with a very small amount of meso-tetrakis(4-carboxyphenyl) N-methylpyrrolidine-fused chlorin (TCPC), TCPC@MOF. Chlorin’s incorporation into the UiO-66(Hf) framework was verified by several characterization methods and revealed that the as-synthesized TCPC@MOF brings together the chemical stability of UiO-66(Hf) and the photophysical properties of the pyrrolidine-fused chlorin which is about five times more emissive than the porphyrin counterpart. TCPC@MOF was further incorporated into polydimethylsiloxane (PDMS) and the resulting TCPC@MOF@PDMS film was tested in NO2 gas sensing. It showed notable sensitivity as well as a fast response in the range between 0.5 and 500 ppm where an emission intensity quenching is observed up to 96% for 500 ppm. This is a rare example of a chlorin-derivative used for gas-sensing applications through emission changes, and an unusual case of this type of optical-sensing composites of NO2.
Type: article
Appears in Collections:QUI - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
LAVQ-REQUIMTE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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