García Moscoso, Francisco JavierRomero Guerrero, Juan JesúsRodriguez Lucena, DavidPedrosa, Jose M.Carrillo Carrión, Carolina2024-08-302024-08-302024-08-19Small Sci. 2024, 240021010.1002/smsc.202400210https://hdl.handle.net/10433/21613This research has been funded by the Spanish AEI/MCIN/10.13039/501100011033 within the Next Generation EU/PRTR funds through the projects PCI2020-112241 (M-ERA.NET 2019 project 7106, SALMOS) and PID2022-141034OB-C22. ERDF (80%) and Andalusian CTEICU/JA in the framework of the Operative Programme FEDER-Andalucia 2014-2020 through project P20 01258 (objective 01) also contributed to the present research. C.C.-C. also acknowledges financial support from the Consejo Superior de Investigaciones Científicas (CSIC) for internal funds (Intramural project, 202280I170). The authors thank the Laboratory of Materials Characterization INMALAB of Universidad Pablo de Olavide for experiments and technical support. Funding for open access publishing: Universidad Pablo de Olavide/CBUA.The well-known and excellent colorimetric sensing capacity of porphyrins, along with the exceptional structural properties of metal–organic frameworks (MOFs), make porphyrin-based MOFs, such as PCN-222, ideal candidates for the construction of a chemical sensor based on absorbance. However, to the best of authors’ knowledge, no high-quality porphyrin-based MOF gas sensors have been developed to date, most likely due to the difficulties in: 1) preparing nanosized porphyrin-MOFs to minimize scattering in absorbance measurements; and 2) incorporating MOFs into transparent membranes for practical use. Herein, a simple and fast microwave-assisted method for preparing high-quality nanosized PCN-222 crystals and their metalated derivatives PCN-222(M) is reported to finely tune the sensing response. Next, the successful dispersion of these PCN-222(M) nanoparticles into poly(dimethylsiloxane) to create flexible and transparent membranes is demonstrated. This integration yields a multiresponsive optical gas sensor exhibiting excellent sensitivity and the ability to discriminate between various volatile organic compounds via pattern recognition identification.application/pdfenAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/AbsorbanceMicrowaveMixed-matrix membranesPCN-222Porphyrin-based metal–organic frameworksPostsynthetic metalationSensingjournal articleopen access