J. Mater. Sci. Technol. ›› 2026, Vol. 264: 211-218.DOI: 10.1016/j.jmst.2025.10.067

Previous Articles     Next Articles

Laccase-mimicking selective catalysis of phenolic substrates by chiral manganese dioxide nanoparticles

Zhihao Mua,b,1, En Yanga,b,1, Wanning Chena,b, Mustafa Zeba,b, Yuan Zhaoc, Yinzhi Zhangd, Jian Zhue, Wei Maa,b,*   

  1. aState Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China;
    bSchool of Food Science and Technology, Jiangnan University, Wuxi 214122, China;
    cSchool of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China;
    dJiangnan University Analysis and Testing Center, Jiangnan University, Wuxi 214122, China;
    eSchool of Materials Science and Engineering, Nankai University, Tianjin 300071, China
  • Received:2025-07-08 Revised:2025-10-19 Accepted:2025-10-20 Published:2026-09-10 Online:2026-09-02
  • Contact: *E-mail addresses: mw@jiangnan.edu.cn , mawei209@126.com (W. Ma) .
  • About author:1 These authors contributed equally to this work.

Abstract: Laccase-mimicking materials have garnered significant attention due to their potential to overcome the limitations of catalytic activity in natural enzymes. In this study, chiral manganese dioxide (MnO2) nanoparticles in the 4-valent manganese form were synthesized using manganese sulfate and potassium permanganate as raw materials, with chiral amino acids serving as ligands under hydrothermal conditions. When using 2,4-dichlorophenol as the substrate, D-phenylalanine (Phe)-MnO2 and L-glutamate-MnO2 exhibited maximum reaction rates of 0.0469 and 0.0406 mM/min, respectively. The laccase-mimicking activity of these two materials significantly exceeded that of natural laccase. When using 3,4-Dihydroxyphenylalanine (DOPA) as a chiral substrate, the phenylalanine-modified MnO2 nanozymes demonstrated superior stereoselectivity. Specifically, D-Phe-MnO2 nanozymes showed the highest oxidation capacity for L-DOPA (Km: 0.0397 mM), while L-Phe-MnO2 nanozymes exhibited the strongest capacity for D-DOPA (Km: 0.0413 mM). The incorporation of chiral ligands enhanced the catalytic performance and introduced selective catalytic activity. These findings open new avenues for designing enzyme-mimicking materials that are highly effective for asymmetric catalysis, with promising applications for sustainable catalysis and chiral synthesis.

Key words: Chirality, MnO2 NPs, Laccase-mimicking, Selective catalysis