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.

Novel perylene probe-encapsulated metal–organic framework nanocomposites for ratiometric fluorescence detection of ATP

2020 ◽  
Vol 8 (16) ◽  
pp. 3661-3666 ◽  
Author(s):  
Xiaomeng Zhou ◽  
Juanmin Li ◽  
Li-Li Tan ◽  
Qiang Li ◽  
Li Shang
Keyword(s):  
Fluorescence Detection ◽  
Metal Organic Framework ◽  
Fluorescence Assay ◽  
Ratiometric Fluorescence ◽  
Metal Organic ◽  
Atp Sensing ◽  
Organic Framework

Schematic illustration of PDI@ZIF-8 nanocomposite synthesis and ratiometric fluorescence assay for ATP sensing. 2-MIm: 2-methylimidazole.

scholarly journals A Dual-Emitting Two-Dimensional Nickel-Based Metal-Organic Framework Nanosheets: Eu3+/Ag+ Functionalization Synthesis and Ratiometric Sensing in Aqueous Solution

2021 ◽  
Author(s):  
Yun Shu ◽  
Tao Dai ◽  
Qiuyu Ye ◽  
Dangqin Jin ◽  
Qin Xu ◽  
...  
Keyword(s):  
Color Change ◽  
Fluorescent Sensor ◽  
Metal Organic Framework ◽  
Organic Ligand ◽  
Disease Diagnosis ◽  
Ph Effects ◽  
Two Dimensional ◽  
Dual Emission ◽  
Metal Organic ◽  
Organic Framework

Abstract Using two-dimensional (2D) nickel-based metal organic framework (Ni-MOF) nanosheets as a matrix, Eu3+ and Ag+ were incorporated to synthesize Ag/Eu@Ni-MOF with double luminescence centers of Eu3+ ion (615 nm) and organic ligand (524 nm). And a ratiometric luminescence sensor is constructed based on Ag/Eu@Ni-MOF for sensitive detection of biothiols in aqueous solutions. The dual-emissive fluorescence properties can be tuned by changing the amounts of Ag+ ions doping. The results of temperature and pH effects on the fluorescence of Ag/Eu@Ni-MOF indicates that the Ag/Eu@Ni-MOF is a temperature-sensitive material and the fluorescence of Ag/Eu@Ni-MOF can keep stable over a wide pH range. Due to the binding of -SH in Cys and GSH with Ag+, the ligand luminescence was significantly inhibited by weakening the Ag+ influence on the energy transfer process in the MOFs. Therefore, ratiometric fluorescent sensing of biomolecular thiols was realized based on the dual-emission Ag/Eu@Ni-MOF. More importantly, the fluorescence color change can be observed with naked eyes to realize visual detection. The ratiometric fluorescent sensor exhibits high performance for Cys and GSH detection with a wide linear range of 5-250 μM and a relatively low detection limit of 0.20 μM and 0.17 μM, respectively. Furthermore, the biothiols content in human serum was determined with satisfactory results. It proves the Ni-MOF nanosheets can be used as a stable matrix for construction luminescent MOFs for the first time, and validate the great potential of Ag/Eu@Ni-MOF as a ratiometric fluorescent probe for point-of-care testing (POCT) in disease diagnosis.

Lanthanide Metal–Organic Framework-Based Fluorescent Sensor Arrays to Discriminate and Quantify Ingredients of Natural Medicine

Langmuir ◽  
2021 ◽  
Vol 37 (17) ◽  
pp. 5321-5328
Author(s):  
Kunpeng Yin ◽  
Siqi Wu ◽  
Hao Zheng ◽  
Liang Gao ◽  
Jinfeng Liu ◽  
...  
Keyword(s):  
Fluorescent Sensor ◽  
Metal Organic Framework ◽  
Sensor Arrays ◽  
Natural Medicine ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Organic Framework
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