Metal–Organic Cages with {SiW9Ni4} Polyoxotungstate Nodes

Qing Chang, Xiangyu Meng, Wenjun Ruan, Yeqin Feng, Rui Li, Jiayu Zhu, Yong Ding*, Hongjin Lv, Wei Wang, Guanying Chen, Xikui Fang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

A tritopic, Ni-substituted Keggin cluster, {SiW9Ni4}, assembles with rigid dicarboxylate linkers to give rise to a set of discrete, POM2nL3n-type structures (POM={SiW9Ni4}) with defined interior voids. The outcome of coordination-driven self-assemblies of these polyhedral cages—from fused dimers to trigonal prisms—was found to be sensitive to bend angles of the ditopic ligands, which vary from 122° to 180°. These polyoxotungstate-based metal–organic polyhedra, when coupled with [Ru(bpy)3]Cl2 as a photosensitizer and triethanolamine as the electron donor, serve as highly effective catalysts for CO2 reduction, with turnover numbers up to 328 and CO selectivity as high as 96.2 %. The inner cavities of such cage structures, if functionalized or of sufficient size to encapsulate targeted guest molecules, could present a new strategy towards functional materials for potential applications.

Original languageEnglish
Article numbere202117637
JournalAngewandte Chemie - International Edition
Volume61
Issue number19
DOIs
Publication statusPublished - 2 May 2022

Keywords

  • CO Photoreduction
  • Metal–Organic Polyhedra
  • Nickel
  • Polyoxometalates
  • Self-Assembly

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