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Communication

Cavitand Decorated Silica as a Selective Preconcentrator for BTEX Sensing in Air

1
Department of Chemistry, Life Sciences and Environmental Sustainability and INSTM UdR Parma, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
2
PROAMBIENTE S.c.r.l., Via P. Gobetti 101, 40129 Bologna, Italy
3
CNR-IMM Bologna, Via P. Gobetti 101, 40129 Bologna, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Sergei Kulinich
Nanomaterials 2022, 12(13), 2204; https://doi.org/10.3390/nano12132204
Received: 31 May 2022 / Revised: 23 June 2022 / Accepted: 26 June 2022 / Published: 27 June 2022
(This article belongs to the Special Issue Nanoparticles on Supramolecular Sensing)
The monitoring of benzene and other carcinogenic aromatic volatile compounds at the ppb level requires boosting both the selectivity and sensitivity of the corresponding sensors. A workable solution is the introduction in the devices of preconcentrator units containing molecular receptors. In particular, quinoxaline cavitands (QxCav) resulted in very efficient preconcentrator materials for the BTEX in air to the point that they have been successfully implemented in a commercial sensor. In this work, we report a highly efficient quinoxaline-based preconcentrator material, in which the intrinsic adsorption capacity of the QxCav has been maximized. The new material consists of silica particles covalently coated with a suitable functionalized QxCav derivative ([email protected]2). In this way, all the cavities are exposed to the analyte flux, boosting the performance of the resulting preconcentration cartridge well above that of the pure QxCav. It is noteworthy that the preconcentrator adsorption capacity is independent of the relative humidity of the incoming air. View Full-Text
Keywords: preconcentrator; quinoxaline cavitand; BTEX sensing; air monitoring; MEMS column preconcentrator; quinoxaline cavitand; BTEX sensing; air monitoring; MEMS column
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MDPI and ACS Style

Rozzi, A.; Pedrini, A.; Pinalli, R.; Cozzani, E.; Elmi, I.; Zampolli, S.; Dalcanale, E. Cavitand Decorated Silica as a Selective Preconcentrator for BTEX Sensing in Air. Nanomaterials 2022, 12, 2204. https://doi.org/10.3390/nano12132204

AMA Style

Rozzi A, Pedrini A, Pinalli R, Cozzani E, Elmi I, Zampolli S, Dalcanale E. Cavitand Decorated Silica as a Selective Preconcentrator for BTEX Sensing in Air. Nanomaterials. 2022; 12(13):2204. https://doi.org/10.3390/nano12132204

Chicago/Turabian Style

Rozzi, Andrea, Alessandro Pedrini, Roberta Pinalli, Enrico Cozzani, Ivan Elmi, Stefano Zampolli, and Enrico Dalcanale. 2022. "Cavitand Decorated Silica as a Selective Preconcentrator for BTEX Sensing in Air" Nanomaterials 12, no. 13: 2204. https://doi.org/10.3390/nano12132204

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