A review of covalent organic frameworks for metal ion fluorescence sensing

Zhen, Deshuai; Liu, Chunlin; Deng, Qiuhui; Zhang, Shaoqi; Yuan, Ningman; Li, Le; Liu, Yu

doi:10.1016/j.cclet.2023.109249

Cited by 16 publications

(3 citation statements)

References 106 publications

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“…The theoretical understanding of the fluorescence excited-state properties of COFs continues to advance, with the identification of mechanisms including intramolecular charge transfer (ICT), excited-state intramolecular proton transfer, photoinduced electron transfer (PET), and phosphorescence . COFs are insoluble in water and organic solvents, offering the potential for the simultaneous detection and removal of metal ions. , …”

Section: Introductionmentioning

confidence: 99%

Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

Zhen,

Liu,

Deng

et al. 2024

ACS Appl. Mater. Interfaces

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Monitoring and purification of uranium contamination are of great importance for the rational utilization of uranium resources and maintaining the environment. In this work, an olefin-linked covalent organic framework (GC-TFPB) and its amidoxime-modified product (GC-TFPB-AO) are synthesized with 3-cyano-4,6-dimethyl-2-hydroxypyridine (GC) and 1,3,5-tris(4-formylphenyl) benzene (TFPB) by Knoevenagel condensation. GC-TFPB-AO results in specificity for rapid fluorescent/smartphone uranyl ion (UO 2 2+ ) detection based on the synergistic effect of multifunctional groups (amidoxime, pyridine, and hydroxyl groups). GC-TFPB-AO features a rapid and highly sensitive detection and adsorption of UO 2 2+ with a detection limit of 21.25 nM. In addition, it has a good recovery (100−111%) for fluorescence detection in real samples, demonstrating an excellent potential of predesigned olefin-linked fluorescent COFs in nuclear contaminated wastewater detection and removal.

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Section: Introductionmentioning

confidence: 99%

Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

Zhen,

Liu,

Deng

et al. 2024

ACS Appl. Mater. Interfaces

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“…In recent times, the worldwide water resources condition has been deteriorating due to the rapid population growth and the intensification of water contamination . Among these wastewaters, dye wastewater accounts for a significant proportion.…”

Section: Introductionmentioning

confidence: 99%

“…In recent times, the worldwide water resources condition has been deteriorating due to the rapid population growth and the intensification of water contamination. 1 Among these wastewaters, dye wastewater accounts for a significant proportion. Rhodamine B (RhB), a common contaminant in dye wastewater, can cause serious ecological effects due to its persistent physicochemical characteristics, which are not easily decomposed in water.…”

Section: Introductionmentioning

confidence: 99%

Near-Infrared-Driven β-NaYF₄:Yb,Tm,Gd/Ni-MOF Nanocomposites for Efficient Sterilization and Degradation of Organic Contaminants

He,

Meng,

Adamu

et al. 2023

ACS Appl. Nano Mater.

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The β-NaYF4:Yb,Tm,Gd/Ni-MOF (UCNR/Ni-MOF, UNM) nanocomposites were successfully synthesized via a simple two-step hydrothermal method. Excited by a 980 nm laser, UCNRs produce ultraviolet and visible light, activating the Ni-MOF and generating a significant quantity of electron/hole pairs (e–/h+). These e–/h+ pairs can then react with O2 and H2O to create reactive oxygen species (ROS), which can be used for antibacterial purposes. Characterization techniques including transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) were utilized to analyze the structure, optical properties, composition, and morphology of the UNM nanocomposites. The photocatalytic performance of UNM was evaluated by testing its ability to kill E. coli and S. aureus as well as degrade rhodamine B (RhB) under 980 nm near-infrared light irradiation (1.0 W/cm2). After 18 min of reaction, the bactericidal rates against E. coli and S. aureus were observed to be roughly 100 and 99.99%, respectively. Similarly, ∼98.49% of RhB was degraded within 180 min. Free radical capture experiments were conducted to further investigate the mechanism of UNM photocatalysis. The main active species involved were determined to be ·O2 – and h+. In addition, UNM was able to retain ∼86.25% of its degradation rate toward RhB after four cycles of cycling experiments, which demonstrated its good stability. Therefore, this study provides a potential strategy to eliminate bacteria and degrade hazardous pollutants in order to mitigate environmental pollution.

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Emissive Hydrazone‐Linked Covalent Organic Frameworks as Highly Sensitive and Selective Sensor for the Hydrazine Detection

Liu,

Wei,

Liang

et al. 2024

Macromol. Rapid Commun.

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Covalent Organic Frameworks (COFs) exhibit a range of exceptional attributes, including notable porosity, outstanding stability, and a precisely tuned π‐conjugated network, rendering them highly promising candidates for fluorescence sensors applications. In this study, the synthesis of two emissive hydrazone‐linked COFs designed for hydrazine detection is presented. The partially conjugated structure of the hydrazone linkage effectively weakens the fluorescence quenching processes induced by aggregation. Additionally, the incorporation of flexible structural components further reduces conjugation, thereby enhancing luminescent efficiency. Remarkably, these COFs possess a significant abundance of heteroatoms, enabling distinctive interactions with hydrazine molecules, which in turn results in exceptional selectivity and sensitivity for hydrazine detection. The detection limit of these COFs reaches the nanomolar range, surpassing all previously reported COFs, thereby underscoring their superior performance in chemical sensing applications.

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A review of covalent organic frameworks for metal ion fluorescence sensing

Cited by 16 publications

References 106 publications

Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

Near-Infrared-Driven β-NaYF₄:Yb,Tm,Gd/Ni-MOF Nanocomposites for Efficient Sterilization and Degradation of Organic Contaminants

Emissive Hydrazone‐Linked Covalent Organic Frameworks as Highly Sensitive and Selective Sensor for the Hydrazine Detection

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A review of covalent organic frameworks for metal ion fluorescence sensing

Cited by 16 publications

References 106 publications

Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

Near-Infrared-Driven β-NaYF4:Yb,Tm,Gd/Ni-MOF Nanocomposites for Efficient Sterilization and Degradation of Organic Contaminants

Emissive Hydrazone‐Linked Covalent Organic Frameworks as Highly Sensitive and Selective Sensor for the Hydrazine Detection

Contact Info

Product

Resources

About

Near-Infrared-Driven β-NaYF₄:Yb,Tm,Gd/Ni-MOF Nanocomposites for Efficient Sterilization and Degradation of Organic Contaminants