Ratiometric Fluorescent Sensor Based on Tb(III) Functionalized Metal-Organic Framework for Formic Acid

Zhang, Chao-Wei; Li, Meiling; Chen, Yi-Duo; Zhou, Qi; Yang, Weiting

doi:10.3390/molecules27248702

Cited by 6 publications

(2 citation statements)

References 47 publications

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“…This threshold represents the concentration at which vapor-phase formic acid develops, harming the nose, throat, and eyes of particularly susceptible individuals . The TPDA-TPB COF exhibits a more effective sensing capability for formic acid in comparison to previously documented substances, such as amperometric biosensors, impedance-based sensors, , MOFs, polymeric-material-based QCM sensors, ,, carbon nitrides, MWCNTs, chemiresistors, and fluorescence sensors (Table S4).…”

Section: Resultsmentioning

confidence: 99%

Covalent-Organic-Framework-Modified Quartz Crystal Microbalance Sensor for Selective Detection of Hazardous Formic Acid

Ahmed,

Lüder,

Chuang

et al. 2024

ACS Appl. Mater. Interfaces

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Covalent organic frameworks (COFs) are a novel family of porous crystalline materials utilized in various advanced applications. However, applying COFs as a hazardous organic acid gas sensor is substantial but still challenging. Herein, a phenylenediamine-based covalent organic framework (TPDA-TPB COF) featuring excellent crystallinity, ultrastable thermal stability, and high surface area was successfully constructed. Then, the TPDA-TPB COF-modified quartz crystal microbalance (QCM) sensor is fabricated by immobilizing the TPDA-TPB COF thin film on the gold-QCM chip. The fabricated TPDA-TPB COF-modified QCM sensor demonstrates a rapid response, excellent reproducibility, high selectivity, and sensitivity to formic gas, arising from hydrogen-bonding interactions between formic acid and the outermost layer of the TPDA-TPB COF, as determined by extensive analysis and density functional theory calculations. The basic sites of the TPDA-TPB COF, which are numerous due to its high nitrogen content, and the carboxylic acid groups present in formic acid exhibit efficient interactions. The sensitivity of the TPDA-TPB COF-modified QCM sensor was found to be 7.75 Hz ppm −1 at standard room temperature and pressure conditions, with a limit of detection (LOD) of formic acid down to 1.18 ppm, which is significantly below the workplace olfactory threshold limit of 5.0 ppm established by the Occupational Safety and Health Administration. The TPDA-TPB COF-modified QCM sensor exhibits remarkable detecting capabilities, making it highly attractive for detecting organic acid vapors in diverse applications that require superior performance.

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Section: Resultsmentioning

confidence: 99%

Covalent-Organic-Framework-Modified Quartz Crystal Microbalance Sensor for Selective Detection of Hazardous Formic Acid

Ahmed,

Lüder,

Chuang

et al. 2024

ACS Appl. Mater. Interfaces

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show abstract

“…Formic acid as a fragrance ingredient, preservative, and pH adjuster has been widely applied in medicine, cosmetic products, and chemical and food industries . Inhalation of formic acid vapor can elicit stimuli and inflammatory response in the human respiratory system, and long-term exposure may lead to chronic toxicity. , Hence, detecting trace amounts of formic acid molecules in the workshop environment is extremely important for the sake of human health and safety . Metal–organic frameworks (MOFs) as an ideal carrier have been demonstrated to improve the reliability and sensitivity of gas sensors for detecting volatile organic compounds (VOCs).…”

mentioning

confidence: 99%

Colorimetric Aerogel Gas Sensor with High Sensitivity and Stability

Xia

Zhang

et al. 2023

Anal. Chem.

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The detection of formic acid vapor in the usage environment is extremely important for human health and safety. The utilization of metal–organic frameworks (MOFs) for the detection of gaseous molecules is an attractive strategy. However, the rational design and construction of MOF-based gas sensors with high sensitivity and mechanical stability remain a significant challenge. In this study, a simple approach is reported to fabricate colorimetric aerogel sensors assembled from MOF particles via ice template-assisted methods. As the aerogel sensor with staggered lamellae structures significantly provides a high air-volume intake of flowing gas, it generates a sufficient probability of contact reactions for highly mobile target molecules. Additionally, it enhances the mechanical stability by providing stress resistance between the staggered lamellae structures. Compared to conventional film sensors for the detection of formic acid molecules, aerogel sensors exhibit an 8-fold lower limit of detection, 15-fold better sensitivity at low concentrations, 34-fold faster response time, and higher stability. This approach shows great potential for rapid and real-time detection of target molecules as well as superior performance in the structural construction of various gas-sensitive materials.

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Simultaneous determination of methanol, ethanol, and formic acid in human serum by HSGC-MS: Method development, validation, and application

Wu,

Xu,

Guo

et al. 2024

Microchemical Journal

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Ratiometric Fluorescent Sensor Based on Tb(III) Functionalized Metal-Organic Framework for Formic Acid

Cited by 6 publications

References 47 publications

Covalent-Organic-Framework-Modified Quartz Crystal Microbalance Sensor for Selective Detection of Hazardous Formic Acid

Covalent-Organic-Framework-Modified Quartz Crystal Microbalance Sensor for Selective Detection of Hazardous Formic Acid

Colorimetric Aerogel Gas Sensor with High Sensitivity and Stability

Simultaneous determination of methanol, ethanol, and formic acid in human serum by HSGC-MS: Method development, validation, and application

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