scholarly journals Construction of a Stable Lanthanide Metal-Organic Framework as a Luminescent Probe for Rapid Naked-Eye Recognition of Fe3+ and Acetone

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1695
Author(s):  
Jiayishuo Wang ◽  
Muxin Yu ◽  
Lian Chen ◽  
Zhijia Li ◽  
Shengchang Li ◽  
...  
Keyword(s):  
Fluorescent Sensor ◽  
Metal Organic Framework ◽  
Hydrolytic Stability ◽  
Aqueous Media ◽  
3D Structure ◽  
Lanthanide Ions ◽  
Quenching Effect ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Eye Recognition

Four lanthanide metal-organic frameworks (Ln-MOFs), namely {[Me2NH2][LnL]·2H2O}n (Ln = Eu 1, Tb 2, Dy 3, Gd 4), have been constructed from a new tetradentate ligand 1-(3,5-dicarboxylatobenzyl)-3,5-pyrazole dicarboxylic acid (H4L). These isostructural Ln-MOFs, crystallizing in the monoclinic P21/c space group, feature a 3D structure with 7.5 Å × 9.8 Å channels along the b axis and the point symbol of {410.614.84} {45.6}2. The framework shows high air and hydrolytic stability, which can keep stable after exposed to humid air for 30 days or immersed in water for seven days. Four MOFs with different lanthanide ions (Eu3+, Tb3+, Dy3+, and Gd3+) ions exhibit red, green, yellow, and blue emissions, respectively. The Tb-MOF emitting bright green luminescence can selectively and rapidly (<40 s) detect Fe3+ in aqueous media via a fluorescence quenching effect. The detection shows excellent anti-inference ability toward many other cations and can be easily recognized by naked eyes. In addition, it can also be utilized as a rapid fluorescent sensor to detect acetone solvent as well as acetone vapor. Similar results of sensing experiments were observed from Eu-MOF. The sensing mechanism are further discussed.

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

In situ encapsulation of pyridine-substituted tetraphenylethene cations in metal–organic framework for the detection of antibiotics in aqueous medium

2019 ◽  
Vol 7 (27) ◽  
pp. 8383-8388 ◽  
Author(s):  
Yan-Mei Ying ◽  
Chen-Lei Tao ◽  
Maoxing Yu ◽  
Yi Xiong ◽  
Chang-Rui Guo ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Fluorescent Sensor ◽  
Metal Organic Framework ◽  
Aqueous Media ◽  
Sensitive Detection ◽  
Metal Organic ◽  
Nitrofuran Antibiotics ◽  
Organic Framework

A highly luminescent MOF containing tetraphenylethene-based cations has been prepared through in situ encapsulation, which can serve as a fluorescent sensor for selective and sensitive detection of nitrofuran antibiotics in aqueous media.

scholarly journals Dual Emission in a Ligand and Metal Co-Doped Lanthanide-Organic Framework: Color Tuning and Temperature Dependent Luminescence

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 523 ◽  
Author(s):  
Despoina Andriotou ◽  
Stavros A. Diamantis ◽  
Anna Zacharia ◽  
Grigorios Itskos ◽  
Nikos Panagiotou ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Metal Organic Framework ◽  
Lanthanide Ions ◽  
Temperature Dependent ◽  
Dual Emission ◽  
Bridging Ligands ◽  
Color Tuning ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Organic Framework

In this study, we report the luminescence color tuning in the lanthanide metal-organic framework (LnMOF) ([La(bpdc)Cl(DMF)] (1); bpdc2− = [1,1′-biphenyl]-4,4′-dicarboxylate, DMF = N,N-dimethylformamide) by introducing dual emission properties in a La3+ MOF scaffold through doping with the blue fluorescent 2,2′-diamino-[1,1′-biphenyl]-4,4′-dicarboxylate (dabpdc2−) and the red emissive Eu3+. With a careful adjustment of the relative doping levels of the lanthanide ions and bridging ligands, the color of the luminescence was modulated, while at the same time the photophysical characteristics of the two chromophores were retained. In addition, the photophysical properties of the parent MOF (1) and its doped counterparts with various dabpdc2−/bpdc2− and Eu3+/La3+ ratios and the photoinduced energy transfer pathways that are possible within these materials are discussed. Finally, the temperature dependence study on the emission profile of a doped analogue containing 10% dabpdc2− and 2.5% Eu3+ (7) is presented, highlighting the potential of this family of materials to behave as temperature sensors.

Family of Lanthanide Metal-Organic Frameworks Based on Redox-Active Tetrathiafulvalene-Dicarboxylic Ligand Showing Slow Relaxation of Magnetisation and Electronic Conductivity

2021 ◽  
Author(s):  
Jun-Jie Hu ◽  
Yu-Guang Li ◽  
He-Rui Wen ◽  
Sui-Jun Liu ◽  
Yan Peng ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Electronic Conductivity ◽  
Metal Organic Frameworks ◽  
Lanthanide Ions ◽  
Framework Materials ◽  
Redox Active ◽  
Important Approach ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Electro Magnetic

The reaction of redox-active tetrathiafulvalene ligand and lanthanide ions is an important approach to prepare photo-electro-magnetic multifunctional metal-organic framework materials. A series of isostructural lanthanide metal-organic frameworks (Ln-MOFs) based on...

Synthesis and Characterization of Lanthanide Metal-Organic Frameworks with Perfluorinated Linkers

2016 ◽  
Vol 98 ◽  
pp. 70-74
Author(s):  
Andrius Laurikėnas ◽  
Jurgis Barkauskas ◽  
Aivaras Kareiva
Keyword(s):  
Metal Organic Frameworks ◽  
Aqueous Media ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Lanthanide Elements ◽  
Diffusion Controlled ◽  
Benzenedicarboxylic Acid ◽  
Metal Organic ◽  
Lanthanide Metal

In this study, lanthanide elements (Ln3+) and 2,3,5,6-tetrafluoro-1,4-benzenedicarboxylic acid (TFBDC) based metal-organic frameworks (MOFs) were synthesized by precipitation and diffusion-controlled precipitation methods. Powders insoluble in aqueous media and polar solvents were obtained. The microstructure and properties of Ln3+ MOFs were evaluated and discussed. X-ray diffraction (XRD) analysis, infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and fluorescence spectroscopy (FLS) were carried out to characterize Ln3+ MOF's crystallinity, the microstructure, chemical composition and optical properties.

A chiral lanthanide metal–organic framework for selective sensing of Fe(iii) ions

2016 ◽  
Vol 45 (3) ◽  
pp. 1040-1046 ◽  
Author(s):  
Xiao-Lin Zhao ◽  
Dan Tian ◽  
Qiang Gao ◽  
Hong-Wei Sun ◽  
Jian Xu ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Luminescence Quenching ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Helical Channels ◽  
Organic Framework

A new luminescent lanthanide metal–organic framework was successfully synthesized, featuring rare 1D chiral helical channels and a highly selective luminescence quenching response to Fe3+ ions.

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