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One-pot Synthesis of Active Copper-Containing Carbon Dots With Laccase-Like Activities

One-pot Synthesis of Active Copper-Containing Carbon Dots With Laccase-Like Activities

Xiangling Ren, Jing Liu, Jun Ren, Fangqiong Tang, Xianwei Meng

Nanoscale. 2015 Dec 14;7(46):19641-6.

PMID: 26548709

Abstract:

Herein, an effective strategy for designing a new type of nanozyme, blue fluorescent laccase mimics, is reported. Active copper-containing carbon dots (Cu-CDs) were synthesized through a simple, nontoxic and one-pot hydrothermal method, which showed favorable photoluminescence properties and good photostability under high-salt conditions or in a broad pH range (3.0-13.5). The Cu-CDs possessed intrinsic laccase-like activities and could catalyze the oxidation of the laccase substrate p-phenylenediamine (PPD) to produce a typical color change from colorless to brown. Poly(methacrylic acid sodium salt) (PMAA) not only was used as the carbon source and reducing agent, but also provided carboxyl groups to assist flocculation between Cu-CDs and polyacrylamide, which facilitated the removal of PPD. Importantly, the intrinsic fluorescence of the as-prepared Cu-CDs could indicate the presence of hydroquinone, one of the substrates of laccases, based on laccase mimics and fluorescence quenching.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP25086628	Poly(methacrylic acid sodium salt)		25086-62-8	Price

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