Oliveira, Ana RitaRamou, EfthymiaPalma, Susana I. C. J.Esteves, CarinaBarbosa, ArménioRoque, Ana Cecília Afonso2023-09-182023-09-182023-11-082694-2461PURE: 71845945PURE UUID: 76df3550-534c-498e-84cc-d8b400fc0e1cScopus: 85169336694WOS: 001048431900001ORCID: /0000-0002-1851-8110/work/151391299ORCID: /0000-0002-9756-4958/work/151404427http://hdl.handle.net/10362/157968Funding Information: This research was funded by the European Research Council (ERC) under the EU Horizon 2020 research and innovation program [grant reference SCENT-ERC-2014-STG-639123, 2015–2022, and Grant Agreement No. 101069405─ENSURE─ERC-2022-POC1]. Publisher Copyright: © 2023 The Authors. Published by American Chemical Society.Ionogels and derived materials are assemblies of polymers and ionic liquids characterized by high stability and ionic conductivity, making them interesting choices as gas sensors. In this work, we assessed the effect of the ionic liquid moiety to generate ionogels and hybrid gels as electrical and optical gas sensors. Six ionic liquids consisting of a constant anion (chloride) and distinct cationic head groups were used to generate ionogels and hybrid gels and further tested as gas sensors in customized electronic nose devices. In general, ionogel-based sensors yielded higher classification accuracies of standard volatile organic compounds when compared to hybrid material-based sensors. In addition, the high chemical diversity of ionic liquids is further translated to a high functional diversity in analyte molecular recognition and sensing.96101697engelectronic nosegas sensinghybrid gelsionic liquidsionogelsElectronic, Optical and Magnetic MaterialsBiomaterialsPolymers and PlasticsMaterials Chemistryjournal article10.1021/acsmaterialsau.3c00042https://www.scopus.com/pages/publications/85169336694