Facile preparation of ultrafine Pd nanoparticles anchored on covalent triazine frameworks catalysts for efficient N-alkylation

Hanghang Zhu; Wei David Wang; Feng Li; Xun Sun; Boyang Li; Qiang Song; Jinfang Kou; Kexin Ma; Xuanguang Ren; Zhengping Dong

doi:10.1016/j.jcis.2021.08.059

Facile preparation of ultrafine Pd nanoparticles anchored on covalent triazine frameworks catalysts for efficient N-alkylation

J Colloid Interface Sci. 2022 Jan 15;606(Pt 2):1340-1351. doi: 10.1016/j.jcis.2021.08.059. Epub 2021 Aug 13.

Authors

Hanghang Zhu¹, Wei David Wang², Feng Li³, Xun Sun⁴, Boyang Li¹, Qiang Song¹, Jinfang Kou¹, Kexin Ma¹, Xuanguang Ren¹, Zhengping Dong⁵

Affiliations

¹ State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
² State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China. Electronic address: ww@lzu.edu.cn.
³ State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, PR China.
⁴ Shandong Applied Research Center of Gold Nanotechnology (Au-SDARC), School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, PR China.
⁵ State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China. Electronic address: dongzhp@lzu.edu.cn.

PMID: 34500150
DOI: 10.1016/j.jcis.2021.08.059

Abstract

The fabrication of stable and efficient catalysts for green and economic catalytic transformation is significant. Here, highly stable covalent triazine frameworks (CTF-1) were used as the supporting material for anchoring ultrafine Pd nanoparticles (NPs) via a facile impregnation process and a one-pot calcination-reduction strategy. The widespread dispersion of ultrafine Pd NPs was a result of the abundant high nitrogen-content triazine groups of CTF-1 that endowed the catalyst Pd@CTF-1 with high catalytic activity. The catalytic performance of Pd@CTF-1 was demonstrated by the one-pot N-alkylation of benzaldehyde with aniline (or nitrobenzene) under mild reaction conditions, and Pd@CTF-1 exhibited a wide range of general applicability for N-alkylation reactions. The reaction mechanism for the N-alkylation reaction was also studied in detail. In addition, the Pd@CTF-1 catalyst exhibited high thermal and chemical stability, maintaining good catalytic efficiency after multiple reaction cycles. This study provides new insights for the fabrication of organic supporting materials with highly dispersed active catalytic sites that can lead to excellent catalytic performance for efficient, economical, and green reactions.

Keywords: Anilines; Benzaldehyde; Covalent triazine frameworks; N-alkylation; Ultrafine Pd nanoparticles.