首页|Methyl functionalization of trimesic acid in copper-based metal-organic framework for ammonia colorimetric sensing at high relative humidity

Methyl functionalization of trimesic acid in copper-based metal-organic framework for ammonia colorimetric sensing at high relative humidity

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Exhaled ammonia(NH3)can be used as a crucial biomarker of kidney and liver diseases.However,the high humidity in the detection conditions remains a challenge for accurate detection by gas sensors.Herein,a copper-based metal-organic framework(CH3-Cu-BTC)with methyl(CH3-)functionalization of trimesic acid was synthesized for NH3 colorimetric sensing.The CH3-Cu-BTC exhibited a strong response for 5 ppm NH3 with high selectivity under high relative humidity(75％RH).Density functional theory(DFT)simulations indicated that the NH3 molecules interacted more strongly with CH3-Cu-BTC than H2O molecules did,and the corresponding color switching was attributed to the lone-pair electron in NH3 changing the coordination environment of Cu2+ions,leading to an obviously visible color switching re-sponse from ruby green to blue.Based on the tailor-made pore chemistry,the precise detection of trace amounts of NH3 in exhaled air was realized through functionalized MOF materials.The strategy used in this study not only offers a new pathway for the rapid detection of low concentration NH3 under humid conditions,but also shows a method for early respiration diagnosis of kidney and liver diseases.

Metal-organic frameworkAmmonia sensingNaked-eye color switchingHigh humidityRespiration diagnosis

Yuxin Wang、Zhengxuan Song、Yutao Liu、Yang Chen、Jinping Li、Libo Li、Jia Yao

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College of Chemical Engineering and Technology,Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,China

Department of Gastroenterology,Shanxi Bethune Hospital,Shanxi Academy of Medical Sciences,Tongji Shanxi Hospital,Third Hospital of Shanxi Medical University,Taiyuan 030024,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShanxi Province 136 Revitalization Medical Project(General Surgery Department)Shanxi Provincial Guiding Science and Technology Special ProjectBasic Research Program of Shanxi Province

2209006222278287222782882021XM42202103021224341

2024

10.1016/j.cclet.2023.108779

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(6)
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