It appears you don't have support to open PDFs in this web browser. To view this file, Open with your PDF reader
Abstract
Two new supramolecular photocatalysts containing Ru(II) polypyridine units as light-harvesting photosensitizers and Re(I) polypyridine subunits as catalytic centers have been prepared. The new species, RuRe2A and Ru2ReA, contain catalytic Re(I) subunits coordinated by the preformed CO2TEOA adduct (known to be the effective catalytic subunits; TEOA is triethanolamine) and exhibit quite efficient and selective photoreduction of CO2 to CO, with outstanding TONs of 2368 and 2695 and a selectivity of 99.9% and 98.9%, respectively. Such photocatalytic properties are significantly improved with respect to those of previously studied RuRe2 and Ru2Re parent compounds, containing chloride ligands instead of the CO2TEOA adduct. Comparison between photocatalytic performance of the new species and their parent compounds allows to investigate the effect of the CO2TEOA insertion process as well as the eventual effect of the presence of chloride ions in solution on the photocatalytic processes. The improved photocatalytic properties of RuRe2A and Ru2ReA compared with their parent species are attributed to a combined effect of different distribution of the one-electron reduced form of the supramolecular photocatalysts on the Ru-subunit(s) (leading to decreased CO formation due to a poisoning ligand loss process) and on the Re-subunit(s) and to the presence of chloride ions in solution for RuRe2 and Ru2Re, which could interfere with the CO2TEOA adduct formation, a needed requisite for CO forming catalysis. These results strongly indicate the utility of preparing supramolecular photocatalysts containing preformed adducts.
You have requested "on-the-fly" machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Show full disclaimer
Neither ProQuest nor its licensors make any representations or warranties with respect to the translations. The translations are automatically generated "AS IS" and "AS AVAILABLE" and are not retained in our systems. PROQUEST AND ITS LICENSORS SPECIFICALLY DISCLAIM ANY AND ALL EXPRESS OR IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES FOR AVAILABILITY, ACCURACY, TIMELINESS, COMPLETENESS, NON-INFRINGMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Your use of the translations is subject to all use restrictions contained in your Electronic Products License Agreement and by using the translation functionality you agree to forgo any and all claims against ProQuest or its licensors for your use of the translation functionality and any output derived there from. Hide full disclaimer
Details
1 University of Messina, and Interuniversitary Research Center for Artificial Photosynthesis (Solar Chem, Messina Node), Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, Messina, Italy (GRID:grid.10438.3e) (ISNI:0000 0001 2178 8421)
2 Tokyo Institute of Technology, Department of Chemistry, School of Science, Meguro-Ku, Japan (GRID:grid.32197.3e) (ISNI:0000 0001 2179 2105)
3 National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Chemical Process Technology, Department of Materials and Chemistry, Sendai, Japan (GRID:grid.208504.b) (ISNI:0000 0001 2230 7538)
4 Tokyo Institute of Technology, Department of Chemistry, School of Science, Meguro-Ku, Japan (GRID:grid.32197.3e) (ISNI:0000 0001 2179 2105); Hiroshima University, Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima, Japan (GRID:grid.257022.0) (ISNI:0000 0000 8711 3200)