A mechanochemically synthesized porous organic polymer derived CQD/chitosan–graphene composite film electrode for electrochemiluminescence determination of dopamine

Pan, Qianxiu; Xu, Zhilu; Deng, Shue; Zhang, Fenglian; Hui, Li; Cheng, Yuan-Zheng; Wei, Liuya; Wang, Jiangyun; Zhou, Baolong

doi:10.1039/c9ra06912g

Cited by 26 publications

(15 citation statements)

References 38 publications

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“…To understand the electrochemical behavior of a CQD film, GCEs were modified by casting 10 μg of CQDs, followed by 1 μg of chitosan to prevent CQDs dispersing in electrolyte solution. Chitosan was used to allow the CQD film to interact with solution species, and for its stability in neutral solution pH (pH > 6.5) (Suginta et al, 2013 ; Wu et al, 2014 ; Xiong et al, 2014 ; Yan et al, 2016 ; Eksin et al, 2017 ; Gonzalez et al, 2018 ; Sun et al, 2018 ; Tashkhourian et al, 2018 ; Pan et al, 2019 ; Sisolakova et al, 2019 ; Yang et al, 2019 ). CV scans show a strong reduction centered at −1.7 V and a slight oxidation peak at 1.3 V in Figure 4C .…”

Section: Resultsmentioning

confidence: 99%

Efficient White Electrochemiluminescent Emission From Carbon Quantum Dot Films

et al. 2020

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Carbon quantum dots (CQDs) were manufactured from citric acid and urea in a gram-scale synthesis with a controlled size range between 1. 5 and 23.8 nm. The size control was realized by varying volume of the precursor solution in a hydrothermal synthesis method. The prepared CQDs were investigated using electrochemiluminescence (ECL) spectroscopy at interfaces of their electrode films and electrolyte solution containing coreactants rather than conventional optoelectronic tests, providing an in-depth analysis of light-emission mechanisms of the so-called half-cells. ECL from the CQD films with TPrA and K 2 S 2 O 8 as coreactants provided information on the stability of the CQD radicals in the films. It was discovered that CQD •− has a powerful electron donating nature to sulfate radical to generate ECL at a relative efficiency of 96% to the Ru(bpy) 3 Cl 2 /K 2 S 2 O 8 coreactant system, indicating a strong performance in light emitting applications. The smaller the CQD particle sizes, the higher the ECL efficiency of the film interface, most likely due to the increased presence of surface states per mass of CQDs. Spooling ECL spectroscopy of the system revealed a potential-dependent light emission starting from a deep red color to blue-shifted intensity maximum, cool bright white emission with a correlated color temperature of 3,200 K. This color temperature is appropriate for most indoor lighting applications. The above ECL results provide information on the performance of CQD light emitters in films, permitting preliminary screening for light emitting candidates in optoelectronic applications. This screening has revealed CQD films as a powerful and cost-effective light emitting layer toward lighting devices for indoor applications.

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Section: Resultsmentioning

confidence: 99%

Efficient White Electrochemiluminescent Emission From Carbon Quantum Dot Films

et al. 2020

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“…In 2019, the group of Zhou proved the versatility of mechanochemical Friedel–Crafts alkylation by generating a hyper-cross-linked polymer from 1,1,2,2-tetraphenylethene as the starting material. 272 As described above, 89 anhydrous FeCl 3 was added to the milling jar to promote cross-coupling, and milling was performed in a planetary ball mill at 500 rpm for 35 min.…”

Section: Mechanochemical Synthesis Of Porous Polymersmentioning

confidence: 99%

The mechanochemical synthesis of polymers

et al. 2022

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“…During a mechanochemical reaction, the collision of the milling balls with the walls of the milling vessel, with the milling material and with themselves results in the transfer of mechanical energy to the involved particles, which initiates a chemical reaction 50,51 . Recently, Lewis acid catalyzed reactions, such as the Scholl coupling reaction or the Friedel‐Crafts alkylation, prevailed for the mechanochemical synthesis of POPs, as they revealed to be both rapid and straightforward and do not require expensive metal catalysts 52–59 …”

Section: Introductionmentioning

confidence: 99%

The mechanochemical Friedel‐Crafts polymerization as a solvent‐free cross‐linking approach toward microporous polymers

Krusenbaum

Geisler

Kraus

et al. 2021

Journal of Polymer Science

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Herein we report the mechanochemical Friedel‐Crafts alkylation of 1,3,5‐triphenylbenzene (TPB) with two organochloride cross‐linking agents, dichloromethane (DCM) and chloroform (CHCl3), respectively. During a thorough milling parameter evaluation, the DCM‐linked polymers were found to be flexible and extremely sensitive toward parameter changes, which even enables the synthesis of a polymer with a SSABET of 1670 m2/g, on par with the solution‐based reference. Contrary, CHCl3‐linked polymers are exhibiting a rigid structure, with a high porosity that is widely unaffected by parameter changes. As a result, a polymer with a SSABET of 1280 m2/g could be generated in as little as 30 minutes, outperforming the reported literature analogue in terms of synthesis time and SSABET. To underline the environmental benefits of our fast and solvent‐free synthesis approach, the green metrics are discussed, revealing an enhancement of the mass intensity, mass productivity and the E‐factor, as well as of synthesis time and the work‐up in comparison to the classical synthesis. Therefore, the mechanochemical polymerization is presented as a versatile tool, enabling the generation of highly porous polymers within short reaction times, with a minimal use of chlorinated cross‐linker and with the possibility of a post polymerization modification.

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A mechanochemically synthesized porous organic polymer derived CQD/chitosan–graphene composite film electrode for electrochemiluminescence determination of dopamine

Abstract: CQDs were obtained from a POP derived porous carbon via nitric acid oxidation. CQDs/CG composite film with special properties were fabricated and used for ECL detection of DA in human body fluids.

Cited by 26 publications

References 38 publications

Efficient White Electrochemiluminescent Emission From Carbon Quantum Dot Films

Efficient White Electrochemiluminescent Emission From Carbon Quantum Dot Films

The mechanochemical synthesis of polymers

The mechanochemical Friedel‐Crafts polymerization as a solvent‐free cross‐linking approach toward microporous polymers

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