Van der Waals Heterostructured MOF‐on‐MOF Thin Films: Cascading Functionality to Realize Advanced Chemiresistive Sensing

Heterostructured metal—organic framework (MOF)‐on‐MOF thin films have the potential to cascade the various properties of different MOF layers in a sequence to produce functions that cannot be achieved by single MOF layers. An integration method that relies on van der Waals interactions, and which ov...

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Published inAngewandte Chemie Vol. 131; no. 42; pp. 15057 - 15061
Main Authors Yao, Ming‐Shui, Xiu, Jing‐Wei, Huang, Qing‐Qing, Li, Wen‐Hua, Wu, Wei‐Wei, Wu, Ai‐Qian, Cao, Lin‐An, Deng, Wei‐Hua, Wang, Guan‐E, Xu, Gang
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 14.10.2019
Subjects
Benzene
Chemistry
Copper
Dünne Schichten
Functional materials
Gas-Sensoren
Heterostrukturen
Integration
Lattice matching
Metal-organic frameworks
MOF-auf-MOF
Organic chemistry
Properties (attributes)
Selectivity
Thin films
Van-der-Waals-Grenzflächen
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Summary:Heterostructured metal—organic framework (MOF)‐on‐MOF thin films have the potential to cascade the various properties of different MOF layers in a sequence to produce functions that cannot be achieved by single MOF layers. An integration method that relies on van der Waals interactions, and which overcomes the lattice‐matching limits of reported methods, has been developed. The method deposits molecular sieving Cu‐TCPP (TCPP=5,10,15,20‐tetrakis(4‐carboxyphenyl)porphyrin) layers onto semiconductive Cu‐HHTP (HHTP=2,3,6,7,10,11‐hexahydrotriphenylene) layers to obtain highly oriented MOF‐on‐MOF thin films. For the first time, the properties in different MOF layers were cascaded in sequence to synergistically produce an enhanced device function. Cu‐TCPP‐on‐Cu‐HHTP demonstrated excellent selectivity and the highest response to benzene of the reported recoverable chemiresistive sensing materials that are active at room temperature. This method allows integration of MOFs with cascading properties into advanced functional materials. Dünne MOF‐auf‐MOF‐Schichten wurden aus Cu‐HHTP (HHTP=Hexahydrotriphenylen) und Cu‐TCPP (TCPP=Tetrakis(4‐carboxyphenyl)porphyrin) hergestellt. Die Eigenschaften der MOF‐Schichten ergänzen sich, sodass sich neue Funktionalitäten ergeben. Der MOF‐auf‐MOF‐Film zeigt exzellente Selektivität und das stärkste Ansprechverhalten auf Benzol, das bisher für regenerierbare chemiresistive Sensormaterialien bei Raumtemperatur berichtet wurde.
Bibliography:These authors contributed equally to this work.
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ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201907772