Surface-Modified Phthalocyanine-Based Two-Dimensional Conjugated Metal–Organic Framework Films for Polarity-Selective Chemiresistive Sensing

Wang M, Zhang Z, Zhong H, Huang X, Li W, Hambsch M, Zhang P, Wang Z, St Petkov P, Heine T, Mannsfeld SCB, Feng X, Dong R (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Angewandte Chemie International Edition Wiley

Book Volume: 60

Pages Range: 18666-18672

Journal Issue: 34

DOI: 10.1002/anie.202104461

Abstract

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.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Sofia University "St. Kliment Ohridski" / Софийски университет "Св. Климент Охридски" BG Bulgaria (BG)

How to cite

APA:

Wang, M., Zhang, Z., Zhong, H., Huang, X., Li, W., Hambsch, M.,... Dong, R. (2021). Surface-Modified Phthalocyanine-Based Two-Dimensional Conjugated Metal–Organic Framework Films for Polarity-Selective Chemiresistive Sensing. Angewandte Chemie International Edition, 60(34), 18666-18672. https://doi.org/10.1002/anie.202104461

MLA:

Wang, Mingchao, et al. "Surface-Modified Phthalocyanine-Based Two-Dimensional Conjugated Metal–Organic Framework Films for Polarity-Selective Chemiresistive Sensing." Angewandte Chemie International Edition 60.34 (2021): 18666-18672.

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