Copper-Based Photosensitisers in Water Reduction: A More Efficient in Situ Formed System and Improved Mechanistic Understanding

Alastair J.J. Lennox, Steffen Fischer, Mark Jurrat, Shu Ping Luo, Nils Rockstroh, Henrik Junge, Ralf Ludwig, Matthias Beller

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

The reduction of water has been achieved through a non-noble-metal-based homogeneous catalyst system that is formed in situ. Optimisation of the ligand quantities increased catalyst turnover numbers compared to preformed complexes. Mechanistic studies confirm a heteroleptic Cu complex as the active photosensitiser (PS) and an in situ formed Fe-phosphido dimer complex as the water reduction catalyst. The in situ method has been used to screen a range of ligands for the active PS, which has led to the identification a number of structural features important to longevity and performance. Cheap ′n′ easy H2: The reduction of water was achieved through a non-noble-metal-based homogeneous catalyst system that is formed in situ. Mechanistic studies confirm a heteroleptic Cu complex as the active photosensitiser (PS) and an in situ formed Fe-phosphido dimer complex as the water reduction catalyst (see scheme). The in situ method was used to screen a range of ligands for the active PS, which led to the identification of a number of structural features important to longevity and performance.

Original languageEnglish
Pages (from-to)1233-1238
Number of pages6
JournalChemistry - A European Journal
Volume22
Issue number4
DOIs
StatePublished - 22 Jan 2016
Externally publishedYes

Keywords

  • copper
  • homogeneous catalysis
  • photocatalysis
  • reaction mechanisms
  • reduction

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