Facile synthesis of a covalent organic framework (COF) based on the reaction of melamine and trimesic acid incorporated electrospun nanofiber and its application as an electrochemical tyrosinamide aptasensor

Sarabaegi, Masoumeh; Roushani, Mahmoud; Hosseini, Hadi; Hoseini, S. Jafar; Bahrami, Mehrangiz

doi:10.1039/d0nj02837a

Cited by 33 publications

(10 citation statements)

References 40 publications

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“…Covalent organic frameworks (COFs), a new kind of porous crystalline material, are constructed entirely from light elements and linked by strong covalent bonds. , COFs, which have a tunable pore size and structure, high surface area, abundant functional groups, and good chemical stability, have been widely applied in catalysis, − sensing, − and extraction. − COF particles can conveniently combine with electrospun nanofibers during the electrospinning process by dispersing in a polymer solution, directly forming a homogeneous precursor solution. ,− When dispersing presynthesized COFs into the polymeric solution and spinning them together, COFs often exist as micron-sized amorphous clusters in the interspace between fibers instead of being distributed on the surface of fibers because of their low density and tendency to aggregate. Moreover, such an electrospinning process through a homogeneous precursor solution makes it difficult to adjust the content of COFs and take full advantage of them.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Guo

Zhou

et al. 2022

ACS Appl. Nano Mater.

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The demand for oil cleanup is one of the most urgent issues and has been involved in global sustainable and green economic development. Existing industrial separation techniques are inefficient and time-consuming, and flexible membranes with selective wettability are currently advantageous for oil/water separation. Here, we report an effectual strategy to prepare composite membranes by combining covalent organic frameworks (COFs) with electrospun nanofibers for oil/water separation. A dip-coating strategy was developed to prepare two different Schiff base COFs [2,4,6-triformylphloroglucinol−4,4′diaminobiphenyl (Tp-BD) and 3,5-tris(4-aminophenyl)benzene−terephthalaldehyde (TAPB-TPA)] on polyacrylonitrile (PAN) nanofibers at room temperature, in which Tp-BD and TAPB-TPA COFs could grow in situ on the surface of single-lined PAN nanofibers, structurally forming rough structures on the nanoscale. The thickness of the COF layer could be controlled by the concentration and volume of the ligand solution. Furthermore, on the basis of the rough structure, lauryl groups were linked to COF nanofibers to simultaneously obtain excellent hydrophobic COF nanofibers and maintain oleophilicity. Finally, superhydrophobic PAN/COF nanofibers with a water contact angle of 167°were applied to separate water-in-oil mixtures. The separation efficiencies of different samples with different oil and water concentrations were all greater than 95%, and the recycling performances of the materials were also satisfactory. The results show that the as-prepared nanofiber membranes have great potential for separating water-in-oil mixtures.

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Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Guo

Zhou

et al. 2022

ACS Appl. Nano Mater.

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“…Real water samples from rivers and taps were also successfully analysed. Another example of the combination of COFs with carbon nanomaterials was described by M. Sarabaegi et al [127]. In this example, the COF is obtained from the reaction between 2,4,6-triamino-1,3,5-triazine and trimesic acid.…”

Section: Aptasensorsmentioning

confidence: 99%

Electrochemical (Bio)Sensors Based on Covalent Organic Frameworks (COFs)

Martínez‐Periñán

Martínez-Fernández

Segura

et al. 2022

Sensors

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Covalent organic frameworks (COFs) are defined as crystalline organic polymers with programmable topological architectures using properly predesigned building blocks precursors. Since the development of the first COF in 2005, many works are emerging using this kind of material for different applications, such as the development of electrochemical sensors and biosensors. COF shows superb characteristics, such as tuneable pore size and structure, permanent porosity, high surface area, thermal stability, and low density. Apart from these special properties, COF’s electrochemical behaviour can be modulated using electroactive building blocks. Furthermore, the great variety of functional groups that can be inserted in their structures makes them interesting materials to be conjugated with biological recognition elements, such as antibodies, enzymes, DNA probe, aptamer, etc. Moreover, the possibility of linking them with other special nanomaterials opens a wide range of possibilities to develop new electrochemical sensors and biosensors.

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“…The SiQDs@PAMAM nanocomposite provides a large surface area and abundant amino groups for the immobilization of DNA probes. For the exploration of new sensitive platforms, a strong tendency toward biomolecules, high surface area, and good electrical conductivity is essential [ 22 ]. Generally, the signal amplification in the electrochemical biosensors can be achieved by using nanomaterials, such as quantum dots [ 23 , 24 ], metal nanoparticles [ 2 , 23 ], and graphene [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

A nanoscale genosensor for early detection of COVID-19 by voltammetric determination of RNA-dependent RNA polymerase (RdRP) sequence of SARS-CoV-2 virus

Farzin¹,

Sadjadi²,

Sheini³

et al. 2021

Microchim Acta

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Graphical abstract A voltammetric genosensor has been developed for the early diagnosis of COVID-19 by determination of RNA-dependent RNA polymerase (RdRP) sequence as a specific target of novel coronavirus. The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) uses an RdRP for the replication of its genome and the transcription of its genes. Here, the silver ions (Ag + ) in the hexathia-18-crown-6 (HT18C6) were used for the first time as a redox probe. Then, the HT18C6(Ag) incorporated carbon paste electrode (CPE) was further modified with chitosan and PAMAM dendrimer-coated silicon quantum dots (SiQDs@PAMAM) for immobilization of probe sequences (aminated oligonucleotides). The current intensity of differential pulse voltammetry using the redox probe was found to decrease with increasing the concentration of target sequence. Based on such signal-off trend, the proposed genosensor exhibited a good linear response to SARS-CoV-2 RdRP in the concentration range 1.0 pM–8.0 nM with a regression equation I (μA) = − 6.555 log [RdRP sequence] (pM) + 32.676 ( R 2 = 0.995) and a limit of detection (LOD) of 0.3 pM. The standard addition method with different spike concentrations of RdRP sequence in human sputum samples showed a good recovery for real sample analysis (> 95%). Therefore, the developed voltammetric genosensor can be used to determine SARS-CoV-2 RdRP sequence in sputum samples. PAMAM-functionalized SiQDs were used as a versatile electrochemical platform for the SARS-CoV-2 RdRP detection based on a signal off sensing strategy. In this study, for the first time, the silver ions (Ag + ) in the hexathia-18-crown-6 carrier were applied as an electrochemical probe. Supplementary Information The online version contains supplementary material available at 10.1007/s00604-021-04773-6.

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Facile synthesis of a covalent organic framework (COF) based on the reaction of melamine and trimesic acid incorporated electrospun nanofiber and its application as an electrochemical tyrosinamide aptasensor

Abstract: Schematic presentation of the COFCNF platform for the highly sensitive detection of tyrosinamide by using a solution containing [Fe(CN)6]3−/[Fe(CN)6]4− as a redox probe.

Cited by 33 publications

References 40 publications

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Polyacrylonitrile Nanofibers Coated with Covalent Organic Frameworks for Oil/Water Separation

Electrochemical (Bio)Sensors Based on Covalent Organic Frameworks (COFs)

A nanoscale genosensor for early detection of COVID-19 by voltammetric determination of RNA-dependent RNA polymerase (RdRP) sequence of SARS-CoV-2 virus

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