The underlying mechanism for the enhanced radical trapping effects of nanoparticles surface-functionalized with antioxidants: A kinetic study

Xiaojie Zhang; Zeng He; Yang Liu; Libo Du

doi:10.1016/j.impact.2021.100328

The underlying mechanism for the enhanced radical trapping effects of nanoparticles surface-functionalized with antioxidants: A kinetic study

NanoImpact. 2021 Jul:23:100328. doi: 10.1016/j.impact.2021.100328. Epub 2021 Jun 2.

Authors

Xiaojie Zhang¹, Zeng He², Yang Liu³, Libo Du⁴

Affiliations

¹ State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, No.2, Zhongguancun North 1st St, Haidian District 100190, Beijing, China; Graduate School, University of Chinese Academy of Sciences, No 19 (A), Yuquan Road, Shijingshan District 100049, Beijing, China.
² Hospital of Chengdu Office of People's Government of Tibetan Autonomous Region, No. 20 Ximianqiao Street, 610041 Chengdu, Sichuan, China.
³ State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, No.2, Zhongguancun North 1st St, Haidian District 100190, Beijing, China.
⁴ State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, No.2, Zhongguancun North 1st St, Haidian District 100190, Beijing, China; Graduate School, University of Chinese Academy of Sciences, No 19 (A), Yuquan Road, Shijingshan District 100049, Beijing, China. Electronic address: dulibo@iccas.ac.cn.

PMID: 35559829
DOI: 10.1016/j.impact.2021.100328

Abstract

The enhancement in reactivity of the antioxidant functionalized gold nanoparticles is closely related to the rate constant and activation energy, which were significantly affected by the chain length of the PEG ligands that capped the gold nanoparticles. Meanwile, the enhancement could be attributed to the π-π stacking interaction between the adjacent phenol groups coated on gold nanoparticles' surface.

Keywords: Activation energy; Antioxidant; Catalysis; Chain length; Rate constant; π-π stacking interaction.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Antioxidants / pharmacology
Gold* / pharmacology
Kinetics
Metal Nanoparticles*

Substances

Antioxidants
Gold