Surface-modification of phthalocyanine-based two-dimensional conjugated metal-organic framework (2D c-MOF) films by grafting aliphatic alkyl chains is developed for achieving high-performance polarity-selective chemiresistive sensing toward humidity and polar alcohols.
2D conjugated metal–organic frameworks (2D c-MOFs) are emerging as electroactive materials for chemiresistive sensors, but selective sensing with fast response/recovery is a challenge. Phthalocyanine-based Ni2[MPc(NH)8] 2D c-MOF films are presented as active layers for polarity-selective chemiresisitors toward water and volatile organic compounds (VOCs). Surface-hydrophobic modification by grafting aliphatic alkyl chains on 2D c-MOF films decreases diffused analytes into the MOF backbone, resulting in a considerably accelerated recovery progress (from ca. 50 to ca. 10 s) during humidity sensing. Toward VOCs, the sensors deliver a polarity-selective response among alcohols but no signal for low-polarity aprotic hydrocarbons. The octadecyltrimethoxysilane-modified Ni2[MPc(NH)8] based sensor displays high-performance methanol sensing with fast response (36 s)/recovery (13 s) and a detection limit as low as 10 ppm, surpassing reported room-temperature chemiresistors.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:81928 |
| Date | 03 November 2022 |
| Creators | Wang, Mingchao, Zhang, Zhe, Zhong, Haixia, LI, Wei, Hambsch, Mike, Zhang, Panpan, Wang, Zhiyong, St. Petkov, Petko, Heine, Thomas, Mannsfeld, Stefan C. B., Feng, Xinliang, Dong, Renhao |
| Publisher | Wiley |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/acceptedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 1521-3773, 10.1002/anie.202104461, qucosa:81934, info:eu-repo/grantAgreement/European Commission/H2020 | ERC | ERC-STG/852909//Development of Functional Conjugated Two-Dimensional Metal-Organic Frameworks/FC2DMOF, info:eu-repo/grantAgreement/European Commission/H2020 | ERC | ERC-COG/819698//Development of Thiophene Based Conjugated Polymers in Two Dimensions/T2DCP, info:eu-repo/grantAgreement/European Commission/H2020 | SGA-RIA/881603//Graphene Flagship Core Project 3/GrapheneCore3, info:eu-repo/grantAgreement/European Commission/H2020 | MSCA-ITN-ETN/813036//Bottom-Up generation of atomicalLy precise syntheTIc 2D MATerials for high performance in energy and Electronic applications – A multi-site innovative training action/ULTIMATE, info:eu-repo/grantAgreement/European Commission/H2020 | RIA/899205//Proto-Opto-Electro-Mechanical Hybrid Systems for Generation-Next Bionic Devices/PROGENY |
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