TY - JOUR
T1 - Surface-Modified Phthalocyanine-Based Two-Dimensional Conjugated Metal–Organic Framework Films for Polarity-Selective Chemiresistive Sensing
AU - Wang, Mingchao
AU - Zhang, Zhe
AU - Zhong, Haixia
AU - Huang, Xing
AU - Li, Wei
AU - Hambsch, Mike
AU - Zhang, Panpan
AU - Wang, Zhiyong
AU - St. Petkov, Petko
AU - Heine, Thomas
AU - Mannsfeld, Stefan C.B.
AU - Feng, Xinliang
AU - Dong, Renhao
N1 - Publisher Copyright:
© 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH
PY - 2021/8/16
Y1 - 2021/8/16
N2 - 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.
AB - 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.
KW - 2D conjugated MOFs
KW - chemiresistive sensors
KW - polarity selectivity
KW - surface modification
KW - volatile organic compounds
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U2 - 10.1002/anie.202104461
DO - 10.1002/anie.202104461
M3 - Article
C2 - 34032341
AN - SCOPUS:85110338564
SN - 1433-7851
VL - 60
SP - 18666
EP - 18672
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 34
ER -