Issue 4, 2007

Highly efficient supramolecular photocatalysts for CO2 reduction using visible light

Abstract

We report the most efficient homogeneous photocatalyst yet for CO2 reduction using a wide range of visible-light wavelength. We synthesized new Ru(II)–Re(I) binuclear complexes with 1,3-bis(4′-methyl-[2,2′]bipyridinyl-4-yl)-propan-2-ol (bpyC3bpy) as a bridge ligand, specifically [Ru-ReP(OEt)3]3+ and [Ru-Repy]3+ where a P(OEt)3 or pyridine ligand coordinates on the Re site. Their photocatalytic activities were compared with [Ru-ReCl]2+, which has a Cl ligand on the Re site and has recently been reported as a much better photocatalyst (Φ = 0.12, TNCO = 160) than a 1 : 1 mixed system of the corresponding Ru(II) and Re(I) mononuclear complexes. The best photocatalyst was [Ru-ReP(OEt)3]3+, for which Φ = 0.21 and TNCO = 232. A mechanistic study clearly showed that [Ru-ReP(OEt)3]3+ is rapidly converted into the solvento complex [Ru-ReSol]3+, (Sol = DMF or TEOA) which is the actual photocatalyst. Although similar rapid ligand substitution occurs with other supramolecules, the pyridine and Cl anions accelerate the decomposition of the supramolecular photocatalysts.

Graphical abstract: Highly efficient supramolecular photocatalysts for CO2 reduction using visible light

Article information

Article type
Paper
Submitted
15 Sep 2006
Accepted
26 Oct 2006
First published
10 Nov 2006

Photochem. Photobiol. Sci., 2007,6, 454-461

Highly efficient supramolecular photocatalysts for CO2 reduction using visible light

S. Sato, K. Koike, H. Inoue and O. Ishitani, Photochem. Photobiol. Sci., 2007, 6, 454 DOI: 10.1039/B613419J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements