Fluorescence Turn-on Detection of Perfluorooctanoic Acid (PFOA) by Perylene Diimide-Based Metal–Organic Framework

Dalapati, Rana; Hunter, Matthew; SK, Mostakim; Yang, Xiaomei; Zang, Ling

doi:10.1021/acsami.4c03389

Cited by 6 publications

(1 citation statement)

References 94 publications

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“…One approach to increase the sensitivity toward PFAS is fluorine functionalization [52,60]. A few other papers using different MOF molecules for PFAS detection are worth mentioning [61][62][63]. Optical or microextraction mass spectrometry was used to transduce the signal.…”

Section: Resultsmentioning

confidence: 99%

First Direct Gravimetric Detection of Perfluorooctane Sulfonic Acid (PFOS) Water Contaminants, Combination with Electrical Measurements on the Same Device—Proof of Concepts

Ivanov,

Venelinov,

Marinov

et al. 2024

Chemosensors

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Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are pollutants of concern due to their long-term persistence in the environment and human health effects. Among them, perfluorooctane sulfonic acid (PFOS) is very ubiquitous and dangerous for health. Currently, the detection levels required by the legislation can be achieved only with expensive laboratory equipment. Hence, there is a need for portable, in-field, and possibly real-time detection. Optical and electrochemical transduction mechanisms are mainly used for the chemical sensors. Here, we report the first gravimetric detection of small-sized molecules like PFOS (MW 500) dissolved in water. A 100 MHz quartz crystal microbalance (QCM) measured at the third harmonic and an even more sensitive 434 MHz two-port surface acoustic wave (SAW) resonator with gold electrodes were used as transducers. The PFOS selective sensing layer was prepared from the metal organic framework (MOF) MIL-101(Cr). Its nano-sized thickness and structure were optimized using the discreet Langmuir–Blodgett (LB) film deposition method. This is the first time that LB multilayers from bulk MOFs have been prepared. The measured frequency downshifts of around 220 kHz per 1 µmol/L of PFOS, a SAW resonator-loaded QL-factor above 2000, and reaction times in the minutes’ range are highly promising for an in-field sensor reaching the water safety directives. Additionally, we use the micrometer-sized interdigitated electrodes of the SAW resonator to strongly enhance the electrochemical impedance spectroscopy (EIS) of the PFOS contamination. Thus, for the first time, we combine the ultra-sensitive gravimetry of small molecules in a water environment with electrical measurements on a single device. This combination provides additional sensor selectivity. Control tests against a bare resonator and two similar compounds prove the concept’s viability. All measurements were performed with pocket-sized tablet-powered devices, thus making the system highly portable and field-deployable. While here we focus on one of the emerging water contaminants, this concept with a different selective coating can be used for other new contaminants.

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Section: Resultsmentioning

confidence: 99%

First Direct Gravimetric Detection of Perfluorooctane Sulfonic Acid (PFOS) Water Contaminants, Combination with Electrical Measurements on the Same Device—Proof of Concepts

Ivanov,

Venelinov,

Marinov

et al. 2024

Chemosensors

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Perylene‐ and Perylene Diimide‐based Framework Materials Constructed through Metal Coordination

Wang,

Wei,

Guan

et al. 2024

Chemistry A European J

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Metal‐organic frameworks (MOFs) are a class of materials composed by coordinative interactions between metal ions and organic linkers, encompassing two‐dimensional (2D), and three‐dimensional (3D) architectures. Metal‐organic cages (MOCs), a special case of these species, are discrete molecular “capsules” with zero‐dimensional (0D) structures. Over the last two decades, MOFs and MOCs composed of organic perylene (P) and perylene diimide (PDI) linkers have gained much attention due to their versatile properties, which can be further enhanced after incorporation into the frameworks. This minireview highlights recent progress in the construction and application of P/PDI‐based coordination framework materials. The text offers an overview of the synthesis of P/PDI organic linkers, proceeds to their integration into coordination frameworks of different dimensionalities ‐ 2D and 3D MOFs, and 0D MOCs, and then explores potential applications. These include sensing, photocatalysis, electrochemical devices as well as photothermal conversion and focus on the apparent structure‐property relationships. Finally, the challenges and future prospects of P/PDI‐derived coordination frameworks will be addressed.

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Efficient Solid-Phase Extraction of Neonicotinoid Insecticides from Environmental Water and Drink Samples Using a Postmodified Metal–Organic Framework

Sun,

Liu

et al. 2024

J. Agric. Food Chem.

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Neonicotinoid insecticides (NNIs) are extensively utilized globally because of their efficient and broad-spectrum properties. However, their residues are also extensively distributed in the environment. Herein, MIL-101-SO 3 Na with abundant −NH− and sulfonate groups was synthesized via chloromethylation and nucleophilic substitution postmodification strategies and used to extract NNIs via solid-phase extraction. MIL-101-SO 3 Na was enhanced by introducing C−H•••N hydrogen bonds to strengthen interaction forces and −SO 3 Na groups to adjust surface charge and enhance electrostatic attraction. This modification and the substantial specific surface area (998 m 2 •g −1 ) of the metal−organic framework markedly enhanced the enrichment efficiency of MIL-101. The proposed method based on MIL-101-SO 3 Na exhibited a minimal detection threshold (0.04−0.87 ng•L −1 ), an extensive linear spectrum (1−2000 ng•L −1 ), and notable accuracy (a variation of 3.02−11.8%) in water and drink samples. NNI concentrations between 0.25 and 24.2 ng•L −1 in fruit juice and tea samples were accurately identified using the proposed method, demonstrating its feasibility in practical applications. The postmodification of MIL-101-SO 3 Na is an exceptional and promising approach for the sensitive detection of ultratrace NNI levels in complex matrices.

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Fluorescence Turn-on Detection of Perfluorooctanoic Acid (PFOA) by Perylene Diimide-Based Metal–Organic Framework

Cited by 6 publications

References 94 publications

First Direct Gravimetric Detection of Perfluorooctane Sulfonic Acid (PFOS) Water Contaminants, Combination with Electrical Measurements on the Same Device—Proof of Concepts

First Direct Gravimetric Detection of Perfluorooctane Sulfonic Acid (PFOS) Water Contaminants, Combination with Electrical Measurements on the Same Device—Proof of Concepts

Perylene‐ and Perylene Diimide‐based Framework Materials Constructed through Metal Coordination

Efficient Solid-Phase Extraction of Neonicotinoid Insecticides from Environmental Water and Drink Samples Using a Postmodified Metal–Organic Framework

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