Porphyrin‐Based COF 2D Materials: Variable Modification of Sensing Performances by Post‐Metallization

2D nanomaterials with flexibly modifiable surfaces are highly sought after for various applications, especially in room‐temperature chemiresistive gas sensing. Here, we have prepared a series of COF 2D nanomaterials (porphyrin‐based COF nanosheets (NS)) that enabled highly sensitive and specific‐sen...

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Published inAngewandte Chemie International Edition Vol. 61; no. 12; pp. e202115308 - n/a
Main Authors Liu, Ming, Chen, Yong‐Jun, Huang, Xin, Dong, Long‐Zhang, Lu, Meng, Guo, Can, Yuan, Daqiang, Chen, Yifa, Xu, Gang, Li, Shun‐Li, Lan, Ya‐Qian
Format Journal Article
LanguageEnglish
Published Germany Wiley Subscription Services, Inc 14.03.2022
EditionInternational ed. in English
Subjects
Copper
Covalent Organic Frameworks
Gas Sensors
Interlayers
Metallizing
Nanomaterials
Nanosheets
Nanotechnology
Nitrogen dioxide
Porphyrin
Porphyrins
Post-Metallization
Room temperature
Two dimensional materials
Nanosheets
Post-Metallization
Gas Sensors
Porphyrin
Covalent Organic Frameworks
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Summary:2D nanomaterials with flexibly modifiable surfaces are highly sought after for various applications, especially in room‐temperature chemiresistive gas sensing. Here, we have prepared a series of COF 2D nanomaterials (porphyrin‐based COF nanosheets (NS)) that enabled highly sensitive and specific‐sensing of NO2 at room temperature. Different from the traditional 2D sensing materials, H2‐TPCOF was designed with a largely reduced interlayer interaction and predesigned porphyrin rings as modifiable sites on its surfaces for post‐metallization. After post‐metallization, the metallized M‐TPCOF (M=Co and Cu) showed remarkably improved sensing performances. Among them, Co‐TPCOF exhibited highly specific sensing toward NO2 with one of the highest sensitivities of all reported 2D materials and COF materials, with an ultra‐low limit‐of‐detection of 6.8 ppb and fast response/recovery. This work might shed light on designing and preparing a new type of surface‐highly‐modifiable 2D material for various chemistry applications. A series of metalloporphyrin covalent organic framework based nanosheets has been synthesized and successfully applied in specific sensing of NO2 at room temperature.
Bibliography:These authors contributed equally to this work.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202115308