Photolytic water oxidation catalyzed by a molecular carbene iridium complex

Files in This Item:
File Description SizeFormat 
DD13_manuscript_final.pdf1.02 MBAdobe PDFDownload
Title: Photolytic water oxidation catalyzed by a molecular carbene iridium complex
Authors: Petronilho, Ana
Rahman, Mahfujur
Woods, James A.
Al-Sayyed, Haris
Müller-Bunz, Helge
MacElroy, J. M. Don
Bernhard, Stefan
Albrecht, Martin
Permanent link: http://hdl.handle.net/10197/6606
Date: 10-Oct-2012
Abstract: The complex IrCl2(Cp*)(trz) (trz = triazolylidene), 2, was prepared from readily available 1,3-dimethyl-4-phenyl-1,2,3-triazolium salt. Under basic conditions, the C-bound phenyl group readily cyclometalates, while under acidic conditions, cyclometalation is reversed. The sensitivity of the Caryl–Ir bond but not the Ctrz–Ir bond towards acidolysis provided a basis for using 2 as a catalyst in CeIV-mediated water oxidation. The catalytic activity is characterized by a robust catalytic cycle, affording excellent turnover numbers (TON > 20 000). Under cerium-free conditions and in the presence of hematite as a photoelectrode, light-induced activity was observed. The photoelectrochemical reaction is strongly pH-dependent, which requires pH adjustments when running multiple cycle experiments to regenerate the catalytic activity. Analogous chelating complexes display better stability and higher catalytic activity than the monodentate complex 2.
Funding Details: European Research Council
Science Foundation Ireland
Type of material: Journal Article
Publisher: Royal Society of Chemistry
Copyright (published version): 2012 The Royal Society of Chemistry
Keywords: CatalysisWater oxidationSustainable energy sources
DOI: 10.1039/C2DT30403A
Language: en
Status of Item: Peer reviewed
Appears in Collections:Solar Energy Conversion (SEC) Cluster Research Collection
Chemical and Bioprocess Engineering Research Collection
Chemistry Research Collection

Show full item record

SCOPUSTM   
Citations 5

73
Last Week
0
Last month
checked on Aug 9, 2018

Page view(s) 50

51
checked on May 25, 2018

Download(s) 50

129
checked on May 25, 2018

Google ScholarTM

Check

Altmetric


This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.