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ToolsBucci, Alberto, Savini, Ariana, Rocchigiani, Luca, Zuccaccia, Cristiano, Rizzato, Silvia, Albinati, Alberto, Llobet, Antoni and Macchioni, Alceo (2012) Organometallic iridium catalysts based on pyridinecarboxylate ligands for the oxidative splitting of water. Organometallics, 31 (23). pp. 8071-8074. ISSN 0276-7333
Full text not available from this repository.Abstract
Organometallic compounds [Cp*Ir(κ2-N,O)X] (κ2-N,O = 2-pyridinecarboxylic acid, ion(−1) (1), 2,4-pyridinedicarboxylic acid, ion(−1) (2), 2,6-pyridinedicarboxylic acid, ion(−1) (3); X– = Cl– ( a ), NO3– (b)) and [Ir(κ3-N,O,O)(1-κ-4,5-η2-C8H13)(MeOH)] (κ3-N,O,O = 2,6-pyridinedicarboxylic acid, ion(−2) (4)) are effective catalysts for the oxidative splitting of water to O2 driven by Ce4+. They show similar TOFLT values (long-term TOF, 2.6–7.4 min–1) while TOFIN values (initial TOF) strongly depend on the catalyst (1 ≫ 2 > 3 > 4), reaching a maximum value of 287 min–1 (4.8 s–1) for 1a , which is the highest TOF value ever reported for an iridium catalyst. Voltammetric measurements indicate that the oxidative processes of compounds 1–4 are located at values substantially less positive than that of [Cp*Ir(bzpy)NO3] (bzpy = 2-benzoylpyridine; ΔE ≈ 0.2–0.3 V), taken as reference catalyst for water oxidation. In particular, compound 3, having a pendant −COOH moiety in close proximity to an iridium coordination site, as shown by the structure determined by single-crystal X-ray diffraction, exhibits several low-potential oxidation processes.
| Item Type: | Article |
|---|---|
| Faculty \ School: | Faculty of Science > School of Chemistry |
| UEA Research Groups: | Faculty of Science > Research Groups > Chemistry of Materials and Catalysis |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 19 Jun 2019 07:30 |
| Last Modified: | 21 Apr 2023 00:04 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/71472 |
| DOI: | 10.1021/om301024s |
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