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A copper(II)/cobalt(II) organic gel with enhanced peroxidase-like activity for fluorometric determination of hydrogen peroxide and glucose

A bimetallic organic gel was prepared by mixing the bridging ligand 2,4,6-tri(4-carboxyphenyl)-1,3,5-triazine with Cu(II) and Co(II) ions at room temperature. The resulting metal-organic gel (MOG) shows enhanced peroxidase-like activity, most likely due to the synergetic redox cycling between Co(III... Full description

Journal Title: Mikrochimica acta (1966) 2019-02-09, Vol.186 (3), p.168-168
Main Author: Zhao, Ting Ting
Other Authors: Jiang, Zhong Wei , Zhen, Shu Jun , Huang, Cheng Zhi , Li, Yuan Fang
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Vienna: Springer Vienna
ID: ISSN: 0026-3672
Link: https://www.ncbi.nlm.nih.gov/pubmed/30739202
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title: A copper(II)/cobalt(II) organic gel with enhanced peroxidase-like activity for fluorometric determination of hydrogen peroxide and glucose
format: Article
creator:
  • Zhao, Ting Ting
  • Jiang, Zhong Wei
  • Zhen, Shu Jun
  • Huang, Cheng Zhi
  • Li, Yuan Fang
subjects:
  • Analytical Chemistry
  • Characterization and Evaluation of Materials
  • Chemistry
  • Chemistry and Materials Science
  • Microengineering
  • Nanochemistry
  • Nanotechnology
  • Original Paper
ispartof: Mikrochimica acta (1966), 2019-02-09, Vol.186 (3), p.168-168
description: A bimetallic organic gel was prepared by mixing the bridging ligand 2,4,6-tri(4-carboxyphenyl)-1,3,5-triazine with Cu(II) and Co(II) ions at room temperature. The resulting metal-organic gel (MOG) shows enhanced peroxidase-like activity, most likely due to the synergetic redox cycling between Co(III)/Co(II) and Cu(II)/Cu(I) pairs. These accelerate interfacial electron transfer and generation of hydroxy radicals. The MOG can catalyze the reaction of H 2 O 2 with terephthalic acid (TPA), producing a blue fluorescence product with the maximum excitation/emission at 315/446 nm. The enzyme mimic was used to design a fluorometric method for H 2 O 2 that has a 81 nM detection limit. H 2 O 2 is also formed by glucose oxidase-assisted oxidation of glucose by oxygen, and an assay for glucose was worked out based on the above method. It has a 0.33 μM detection limit. This study may open up a new avenue to design and synthesize nanomaterial-based biomimetic catalysts with multiple metal synergistically enhanced catalytic activity for potential applications in biocatalysis, bioassays and nano-biomedicine. Graphical abstracts Schematic presentation of the synergic catalytic effect of Cu(II)/Co(II) bimetallic organic gel promoted by the redox cycle between Co(III)/Co(II) and Cu(II)/Cu(I) pairs. The bimetallic organic gel can catalyze the reaction of H 2 O 2 with terephthalic acid, thereby producing a blue-fluorescent product.
language: eng
source:
identifier: ISSN: 0026-3672
fulltext: no_fulltext
issn:
  • 0026-3672
  • 1436-5073
url: Link


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descriptionA bimetallic organic gel was prepared by mixing the bridging ligand 2,4,6-tri(4-carboxyphenyl)-1,3,5-triazine with Cu(II) and Co(II) ions at room temperature. The resulting metal-organic gel (MOG) shows enhanced peroxidase-like activity, most likely due to the synergetic redox cycling between Co(III)/Co(II) and Cu(II)/Cu(I) pairs. These accelerate interfacial electron transfer and generation of hydroxy radicals. The MOG can catalyze the reaction of H 2 O 2 with terephthalic acid (TPA), producing a blue fluorescence product with the maximum excitation/emission at 315/446 nm. The enzyme mimic was used to design a fluorometric method for H 2 O 2 that has a 81 nM detection limit. H 2 O 2 is also formed by glucose oxidase-assisted oxidation of glucose by oxygen, and an assay for glucose was worked out based on the above method. It has a 0.33 μM detection limit. This study may open up a new avenue to design and synthesize nanomaterial-based biomimetic catalysts with multiple metal synergistically enhanced catalytic activity for potential applications in biocatalysis, bioassays and nano-biomedicine. Graphical abstracts Schematic presentation of the synergic catalytic effect of Cu(II)/Co(II) bimetallic organic gel promoted by the redox cycle between Co(III)/Co(II) and Cu(II)/Cu(I) pairs. The bimetallic organic gel can catalyze the reaction of H 2 O 2 with terephthalic acid, thereby producing a blue-fluorescent product.
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abstractA bimetallic organic gel was prepared by mixing the bridging ligand 2,4,6-tri(4-carboxyphenyl)-1,3,5-triazine with Cu(II) and Co(II) ions at room temperature. The resulting metal-organic gel (MOG) shows enhanced peroxidase-like activity, most likely due to the synergetic redox cycling between Co(III)/Co(II) and Cu(II)/Cu(I) pairs. These accelerate interfacial electron transfer and generation of hydroxy radicals. The MOG can catalyze the reaction of H 2 O 2 with terephthalic acid (TPA), producing a blue fluorescence product with the maximum excitation/emission at 315/446 nm. The enzyme mimic was used to design a fluorometric method for H 2 O 2 that has a 81 nM detection limit. H 2 O 2 is also formed by glucose oxidase-assisted oxidation of glucose by oxygen, and an assay for glucose was worked out based on the above method. It has a 0.33 μM detection limit. This study may open up a new avenue to design and synthesize nanomaterial-based biomimetic catalysts with multiple metal synergistically enhanced catalytic activity for potential applications in biocatalysis, bioassays and nano-biomedicine. Graphical abstracts Schematic presentation of the synergic catalytic effect of Cu(II)/Co(II) bimetallic organic gel promoted by the redox cycle between Co(III)/Co(II) and Cu(II)/Cu(I) pairs. The bimetallic organic gel can catalyze the reaction of H 2 O 2 with terephthalic acid, thereby producing a blue-fluorescent product.
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