A luminescent metal–organic framework integrated hydrogel optical fibre as a photoluminescence sensing platform for fluorescence detection

2019 ◽  
Vol 7 (4) ◽  
pp. 897-904 ◽  
Author(s):  
Lishuai Zhao ◽  
Jiulin Gan ◽  
Tifeng Xia ◽  
Licheng Jiang ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibre ◽  
Fluorescence Detection ◽  
Metal Organic Framework ◽  
Sensing Platform ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

A fluorescence detection platform based on a metal–organic framework material incorporated hydrogel optical fiber is proposed for the first time.

Solvent-Free Powder Synthesis and MOF-CVD Thin Films of the Mesoporous Metal-Organic Framework MAF-6

2019 ◽  
Author(s):  
Timothée Stassin ◽  
Ivo Stassen ◽  
Joao Marreiros ◽  
Alexander John Cruz ◽  
Rhea Verbeke ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Metal Organic Framework ◽  
Chemical Vapor ◽  
Uptake Capacity ◽  
Powder Synthesis ◽  
Crystalline Films ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
First Time ◽  
Organic Framework

A simple solvent- and catalyst-free method is presented for the synthesis of the mesoporous metal-organic framework (MOF) MAF-6 (RHO-Zn(eIm)2) based on the reaction of ZnO with 2-ethylimidazole vapor at temperatures ≤ 100 °C. By translating this method to a chemical vapor deposition (CVD) protocol, mesoporous crystalline films could be deposited for the first time entirely from the vapor phase. A combination of PALS and Kr physisorption measurements confirmed the porosity of these MOF-CVD films and the size of the MAF-6 supercages (diam. ~2 nm), in close agreement with powder data and calculations. MAF-6 powders and films were further characterized by XRD, TGA, SEM, FTIR, PDF and EXAFS. The exceptional uptake capacity of the mesoporous MAF-6 in comparison to the microporous ZIF-8 is demonstrated by vapor-phase loading of a molecule larger than the ZIF-8 windows.

scholarly journals Volatile Organic Compound Vapour Measurements Using a Localised Surface Plasmon Resonance Optical Fibre Sensor Decorated with a Metal-Organic Framework

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1420
Author(s):  
Chenyang He ◽  
Liangliang Liu ◽  
Sergiy Korposh ◽  
Ricardo Correia ◽  
Stephen P. Morgan
Keyword(s):  
Surface Plasmon Resonance ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Surface Plasmon ◽  
Optical Fibre ◽  
Plasmon Resonance ◽  
Metal Organic Framework ◽  
Volatile Organic ◽  
Metal Organic ◽  
Organic Framework

A tip-based fibreoptic localised surface plasmon resonance (LSPR) sensor is reported for the sensing of volatile organic compounds (VOCs). The sensor is developed by coating the tip of a multi-mode optical fibre with gold nanoparticles (size: 40 nm) via a chemisorption process and further functionalisation with the HKUST-1 metal–organic framework (MOF) via a layer-by-layer process. Sensors coated with different cycles of MOFs (40, 80 and 120) corresponding to different crystallisation processes are reported. There is no measurable response to all tested volatile organic compounds (acetone, ethanol and methanol) in the sensor with 40 coating cycles. However, sensors with 80 and 120 coating cycles show a significant redshift of resonance wavelength (up to ~9 nm) to all tested volatile organic compounds as a result of an increase in the local refractive index induced by VOC capture into the HKUST-1 thin film. Sensors gradually saturate as VOC concentration increases (up to 3.41%, 4.30% and 6.18% in acetone, ethanol and methanol measurement, respectively) and show a fully reversible response when the concentration decreases. The sensor with the thickest film exhibits slightly higher sensitivity than the sensor with a thinner film. The sensitivity of the 120-cycle-coated MOF sensor is 13.7 nm/% (R2 = 0.951) with a limit of detection (LoD) of 0.005% in the measurement of acetone, 15.5 nm/% (R2 = 0.996) with an LoD of 0.003% in the measurement of ethanol and 6.7 nm/% (R2 = 0.998) with an LoD of 0.011% in the measurement of methanol. The response and recovery times were calculated as 9.35 and 3.85 min for acetone; 5.35 and 2.12 min for ethanol; and 2.39 and 1.44 min for methanol. The humidity and temperature crosstalk of 120-cycle-coated MOF was measured as 0.5 ± 0.2 nm and 0.5 ± 0.1 nm in the humidity range of 50–75% relative humidity (RH) and temperature range of 20–25 °C, respectively.

Nanoscale Metal–Organic Framework Based Two-Photon Sensing Platform for Bioimaging in Live Tissue

2019 ◽  
Vol 91 (4) ◽  
pp. 2727-2733 ◽  
Author(s):  
Chan Yang ◽  
Kun Chen ◽  
Mei Chen ◽  
Xiaoxiao Hu ◽  
Shuang-Yan Huan ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Two Photon ◽  
Live Tissue ◽  
Sensing Platform ◽  
Metal Organic ◽  
Organic Framework

scholarly journals A dual emission metal–organic framework for rapid ratiometric fluorescence detection of CO32− in seawater

RSC Advances ◽  
2020 ◽  
Vol 10 (42) ◽  
pp. 24764-24771
Author(s):  
Yu Wei ◽  
Yan Xia
Keyword(s):  
Fluorescence Detection ◽  
Fluorescent Sensor ◽  
Metal Organic Framework ◽  
Ratiometric Fluorescence ◽  
Dual Emission ◽  
Metal Organic ◽  
Organic Framework

A dual emission metal–organic framework (IRMOF-10-Eu) was prepared and used as a ratiometric fluorescent sensor for CO32− detection.

Metal–organic frameworks: a universal strategy towards super-elastic hydrogels

2019 ◽  
Vol 10 (18) ◽  
pp. 2263-2272 ◽  
Author(s):  
Huaizhi Liu ◽  
Hao Peng ◽  
Yumeng Xin ◽  
Jiuyang Zhang
Keyword(s):  
Drug Delivery ◽  
Mechanical Performance ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
High Loading ◽  
Loading Capacity ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

We reported for the first time using metal–organic framework (MOF) nanoparticles as effective nanofillers to significantly enhance the mechanical performance of hydrogels. The MOF hydrogels have been developed for drug delivery materials with high loading capacity and much extended drug releasing profiles.

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