Enhanced mimetic enzyme activity of phosphorylated porphyrin nanocomposite induced by localized surface plasmon resonance for colorimetric assay
Analytical Sciences, ISSN: 1348-2246, Vol: 35, Issue: 6, Page: 691-699
2019
- 9Citations
- 10Captures
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Article Description
Plasmon-enhanced light harvesting has been of great interest to enhance the catalytic efficiency of some composites or hybrids. The enhanced peroxidase-like activity of phosphorylated iron(III) porphyrin (TPPFe(III))-based nanocomposite, induced by localized surface plasmon resonance for a colorimetric assay, was developed in this study. Firstly, a phosphate group modification strategy was adopted to synthesize water-soluble iron(III) porphyrin materials. Then, the assynthesized TPPFe(III) was covalently attached to core-shell gold nanorods (GNRs), GNR@AuS/AuAgS, to form TPPFe(III)-GNR@AuS/AuAgS nanocomposite, which shows greatly enhanced peroxidase-like activity compared to TPPFe(III). A mechanism for the enhanced peroxidase-like activity of TPPFe(III)-GNR@AuS/AuAgS was proposed, which results from a synergic effect of hot electrons excited by localized surface plasmon resonance and photogenerated electrons of the TPPFe(III), verified by experiments. Furthermore, a fast colorimetric assay for the detection of HO and glucose was established based on the unique property of TPPFe(III)-GNR@AuS/AuAgS. This colorimetric assay was applied to determine practical human serum samples; satisfactory results demonstrate this method has high accuracy. The present study would not only provide some insights into the mechanism of plasmon-activated enzyme-like reactions, but also offer new strategies for improving the catalytic activity of a mimetic enzyme.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85067180101&origin=inward; http://dx.doi.org/10.2116/analsci.19p004; http://www.ncbi.nlm.nih.gov/pubmed/30853695; https://link.springer.com/10.2116/analsci.19P004; https://dx.doi.org/10.2116/analsci.19p004; https://link.springer.com/article/10.2116/analsci.19P004; https://www.jstage.jst.go.jp/article/analsci/35/6/35_19P004/_article/-char/en/; https://www.jstage.jst.go.jp/article/analsci/35/6/35_19P004/_article/-char/ja/
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