Methane Detection with a Tungsten‐Calix[4]arene‐Based Conducting Polymer Embedded Sensor Array
Methane Detection with a Tungsten‐Calix[4]arene‐Based Conducting Polymer Embedded Sensor Array
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DOI：
10.1002/adfm.202007281
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发表时间：
2020-11
影响因子：
19
通讯作者：
Ruqiang Lu;S. Luo;Qilin He;A. Concellón;T. Swager
中科院分区：
文献类型：
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作者：
Ruqiang Lu;S. Luo;Qilin He;A. Concellón;T. Swager
甲烷的检测对工业、环境和我们的日常生活都很重要，但由于其体积小、挥发性高、非极性等特点，使得检测变得具有挑战性。本文以六氟磷酸根或高氯酸根反阴离子为换能器，以钨封端的杯[4]芳烃为基的磷掺杂导电聚合物用于检测干燥空气中的甲烷。聚合物链中杯芳烃部分与甲烷分子之间的主客体相互作用导致聚合物的电阻变化。基于聚合物的传感器在室温下对甲烷的实验检测下限(LOD)小于50ppm，外推的2ppm的理论LOD代表了对甲烷的极高灵敏度。此外，利用互补化学电阻和主成分分析的传感器阵列实现了甲烷和干扰挥发性有机化合物的区分。
The detection of methane is important for industry, environment, and our daily life, but is made challenging by its small size, high volatility, and nonpolar nature. Herein, a tungsten‐capped calix[4]arene‐based p‐doped conducting polymer with hexafluorophosphate or perchlorate counter‐anions as a transducer is used to detect methane in dry air. The host–guest interaction between calixarene moieties within the polymer chain and methane molecules leads to the resistance variation of the polymer. The experimental limit of detection (LoD) of methane for the polymer‐based sensor is demonstrated to be less than 50 ppm at room temperature, and the extrapolated theoretical LoD of 2 ppm represents exceptional sensitivity to methane. Furthermore, the discrimination of methane from interfering volatile organic compounds is achieved by exploiting a sensor array using complementary chemiresistors and principal component analysis.