A fluorometric metal-organic framework oxygen sensor: from sensitive powder to portable optical fiber device

Xia, Tifeng; Jiang, Licheng; Zhang, Jun; Wan, Yating; Yang, Yu; Gan, Jiulin; Cui, Yuanjing; Yang, Zhongmin; Qian, Guodong

doi:10.1016/j.micromeso.2020.110396

Cited by 27 publications

(11 citation statements)

References 50 publications

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“…Depending on the MOF structure, this loss in sensitivity can be moderate (ca. threefold reduction in sensitivity in MAF-2, MAF-4, and a Eu-NDC MOF) [ 105 , 111 , 113 ] or almost complete as observed in some PCN-224 type MOFs [ 97 ]. The magnitude of this effect appears to depend on the size of the apertures connecting the pores of the framework.…”

Section: Mofsmentioning

confidence: 99%

“…Free-standing MOF crystals cannot be applied easily and serve only as a model system, and MOF immobilization in polymers might be challenging since sensitivity may reduce significantly [ 97 ]. Fortunately, it is possible to grow crystals of such MOFs on different porous supports [ 97 ] whereas other MOFs with smaller pores appear not to show drastic sensitivity decrease upon immobilization [ 111 ]. Handling of sensors based on electrospun fibers also may be challenging for many applications like imaging of oxygen distribution on surfaces.…”

Section: Comparison Of Different Porous and Non-porous Matricesmentioning

confidence: 99%

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Porous matrix materials in optical sensing of gaseous oxygen

Dalfen

Borisov

2022

Anal Bioanal Chem

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The review provides comparison of porous materials that act as a matrix for luminescent oxygen indicators. These include silica-gels, sol–gel materials based on silica and organically modified silica (Ormosils), aerogels, electrospun polymeric nanofibers, metal–organic frameworks, anodized alumina, and various other microstructured sensor matrices. The influence of material structure and composition on the efficiency of oxygen quenching and dynamic response times is compared and the advantages and disadvantages of the materials are summarized to give a guide for design and practical application of sensors with desired sensitivity and response time. Graphical abstract

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Section: Mofsmentioning

confidence: 99%

Section: Comparison Of Different Porous and Non-porous Matricesmentioning

confidence: 99%

Porous matrix materials in optical sensing of gaseous oxygen

Dalfen

Borisov

2022

Anal Bioanal Chem

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“…The reversibility is an indication of the response time and reproducibility of the ratiometric oxygen sensor. The response time includes the quenching time t Q and recovery time t R [29,30], which represent the time required for a 95% change in the luminescence signal; t Q considers the change from an anaerobic to aerobic atmosphere, and t R considers the change from an aerobic to anaerobic environment [31]. Figure 7 shows the variation of the OP value, and the response time of the film under the alternating conversion of the deoxygenation (DO = 0 mg/L) and oxygenation environment (DO = 6 mg/L).…”

Section: Reversibility Of the Ratiometric Oxygen-sensing Systemmentioning

confidence: 99%

Ratiometric Sensor Based on PtOEP-C6/Poly (St-TFEMA) Film for Automatic Dissolved Oxygen Content Detection

Zhang

2020

Sensors

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A ratiometric oxygen sensor based on a platinum octaethylporphyrin (PtOEP)–coumarin 6 (C6)/poly (styrene-trifluoroethyl methacrylate) (poly (St-TFEMA)) film was developed for automatic dissolved oxygen (DO) detection. The oxygen-sensing film according to the dynamic quenching mechanism was prepared by embedding platinum octaethylporphyrin (PtOEP) and coumarin 6 (C6) in poly (styrene-trifluoroethyl methacrylate) (poly (St-TFEMA)). The optical parameter (OP) was defined as the ratio of the oxygen-insensitive fluorescence from C6 to the oxygen-sensitive phosphorescence from PtOEP. A calibration equation expressing the correlation between the OP values and DO content described by a linear function was obtained. A program based on the Labview software was developed for monitoring the real-time DO content automatically. The influence of the excitation intensity and fluctuation on the OP values and the direct luminescence signal (integration areas) was compared, verifying the strong anti-interference ability of the sensor. The detection limit of the sensor was determined to be 0.10 (1) mg/L. The switching response time and recovery time of the sensor were 0.4 and 1.3 s, respectively. Finally, the oxygen sensor was applied to the investigation of the kinetic process of the DO content variation, which revealed an exponential relationship with time.

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“…However, oxygen is consumed during the electrochemical process, which hinders the application of electrochemical methods in continuous oxygen measurement in a closed environment. Among all the methods, optical oxygen sensors based on the fluorescence quenching effect, which is induced by the collision between triplet oxygen and luminescent indicators, does not consume oxygen nor transmit electrical signals due to the particularity of the photophysical process during detection and exhibits a higher sensitivity (0.013–263), a wider dynamic range (0–100%, oxygen concentration) [ 6 ], a faster response [ 8 ], and immunity to external magnetic interference [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Tuning the Sensitivity and Dynamic Range of Optical Oxygen Sensing Films by Blending Various Polymer Matrices

Zhang

et al. 2021

Biosensors

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In this work, eight different types of optical oxygen sensing films were prepared by impregnating indicator and matrix solution on the surface of a polypropylene microporous filter membrane. The polymer matrix of the sensing films was ethyl cellulose (EC), polymethyl methacrylate (PMMA), and their blends with different mixing ratios. Scanning electron microscopy (SEM), laser confocal microscopy, and fluorescence spectrometer were used to investigate the morphologies and optical properties of the sensing films. Phase delay measurements under different oxygen partial pressures (PO2) and temperatures were applied to investigate the analytical performances of the sensing film for gaseous O2 monitoring. Results show that the response time of all the sensing films was extremely fast. The sensitivities and dynamic ranges of the sensing films with the blended polymer matrix were separately decreased and increased as the EC/PMMA ratio decreased, and the S-V curve of the sensing films blended with equal content of EC and PMMA exhibited good linearity under different temperatures, showing a promising prospect in practical application.

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A fluorometric metal-organic framework oxygen sensor: from sensitive powder to portable optical fiber device

Cited by 27 publications

References 50 publications

Porous matrix materials in optical sensing of gaseous oxygen

Porous matrix materials in optical sensing of gaseous oxygen

Ratiometric Sensor Based on PtOEP-C6/Poly (St-TFEMA) Film for Automatic Dissolved Oxygen Content Detection

Tuning the Sensitivity and Dynamic Range of Optical Oxygen Sensing Films by Blending Various Polymer Matrices

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