Understanding the roles of variable Pd(II)/Pd(0) ratio supported on conjugated poly-azobenzene network: From characteristic alteration in properties to their cooperation towards visible-light-induced selective hydrogenation

Ipsita Nath, Jeet Chakraborty, Gaoke Zhang, Cheng Chen, Somboon Chaemchuen, Jihae Park, Serge Zhuiykov, Taejun Han, Francis Verpoort

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Selective hydrogenation of organic functionalities at environmentally benign conditions using visible light is of great industrial and economic significance. Herein we report visible-light-induced rapid, almost quantitative and selective hydrogenation of olefins to respective mono-reduced products using cooperative performance of Pd(0) nanoparticles (NPs) and Pd(II) ions evenly distributed on a newly synthesized conjugated mesoporous poly-azobenzene network. Role of variable Pd(0)/Pd(II) ratio on the properties of polymeric networks and their overall catalytic abilities is critically investigated. This is the first proposed example of cooperative hydrogenation by simultaneous activation of H2 and unsaturated substrates using Mott-Schottky heterojunction between Pd NPs and the semiconducting polymer, with the help of Pd(II)-site-mediated η-coordination. A control over selective mono-reduction of diene with identical double bonds was also obtained. The catalytic activity retained for other non-olefinic functionalities as well.

Original languageEnglish
Pages (from-to)120-128
Number of pages9
JournalJournal of Catalysis
Volume385
DOIs
Publication statusPublished - May 2020

Keywords

  • Azobenzene
  • Cooperative mechanism
  • Mott-Schottky interface
  • Porous organic polymer
  • Selective hydrogenation
  • Visible light
  • η-coordination

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Understanding the roles of variable Pd(II)/Pd(0) ratio supported on conjugated poly-azobenzene network: From characteristic alteration in properties to their cooperation towards visible-light-induced selective hydrogenation'. Together they form a unique fingerprint.

  • Cite this