Dendronized triazolyl-containing ferrocenyl polymers as stabilizers of gold nanoparticles for recyclable two-phase reduction of 4-nitrophenol

Fangfei Liu; Xiong Liu; Didier Astruc; Haibin Gu

doi:10.1016/j.jcis.2018.08.062

Dendronized triazolyl-containing ferrocenyl polymers as stabilizers of gold nanoparticles for recyclable two-phase reduction of 4-nitrophenol

J Colloid Interface Sci. 2019 Jan 1:533:161-170. doi: 10.1016/j.jcis.2018.08.062. Epub 2018 Aug 22.

Authors

Fangfei Liu¹, Xiong Liu¹, Didier Astruc², Haibin Gu³

Affiliations

¹ Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China; National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China.
² ISM, UMR CNRS N(o) 5255, Univ. Bordeaux, 33405 Talence Cedex, France. Electronic address: didier.astruc@u-bordeaux.fr.
³ Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China; National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China. Electronic address: guhaibinkong@126.com.

PMID: 30153593
DOI: 10.1016/j.jcis.2018.08.062

Abstract

A series of small-sized (about 2.0 nm) gold nanoparticles (AuNPs) with apparent lattice fringes are synthesized by NaBH₄ reduction of HAuCl₄ in the presence of stabilizing linear or dendronized 1,2,3-triazolyl-containing ferrocenyl polymers. These AuNPs show high catalytic activity for biphasic 4-nitrophenol (4-NP) reduction to 4-aminophenol (4-AP) by NaBH₄. The lower generation G1 dendronized polymers (DPs) is a more efficient stabilizer for AuNP catalytic activity in the reduction of 4-NP than linear G0 polymers or bulky G2 DPs. The G1 DP-stabilized AuNPs are robust and easily recyclable, and the catalyst is recovered and reused at least twenty times with progressive smooth AuNP size increase along with some decrease of catalytic activity.

Keywords: 4-nitrophenol reduction; Biphasic catalysis; Catalysis; Catalyst recycling; Dendrimer; Dendron; Gold nanoparticles; Polymer.