TY - JOUR
T1 - MOF-based materials with sensing potential
T2 - pyrrolidine-fused chlorin at UiO-66(Hf) for enhanced NO2 detection
AU - Queirós, Carla
AU - Moscoso, Francisco G.
AU - Almeida, José
AU - Silva, Ana M. G.
AU - Sousaraei, Ahmad
AU - Cabanillas-González, Juan
AU - Carrott, Manuela Ribeiro
AU - Lopes-Costa, Tânia
AU - Pedrosa, José M.
AU - Cunha-Silva, Luís
N1 - Publisher Copyright:
© 2022 by the authors.
PY - 2022/12
Y1 - 2022/12
N2 - 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.
AB - 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.
KW - N-methylpyrrolidine-fused chlorin
KW - Metal-organic framework
KW - Composite
KW - Optical sensor
KW - NO2 sensing
UR - https://www.scopus.com/pages/publications/85144923154
U2 - 10.3390/chemosensors10120511
DO - 10.3390/chemosensors10120511
M3 - Article
AN - SCOPUS:85144923154
SN - 2227-9040
VL - 10
JO - Chemosensors
JF - Chemosensors
IS - 12
M1 - 511
ER -