Comparison of iridium sensitizers employed in the photoelectrochemical generation of added-value organics Andrea Mantovani a , Edoardo Marchini a , Annagioia Mastrolorenzo b , Paola Manini b , Mirco Natali a a Departiment of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy, b Departiment of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126 Napoli, Italy andrea.mantovani@unife.it The pressing issues of climate change need the development of sustainable technologies. [1] Dye-sensitized photoelectrochemical cells (DSPECs) represent a promising approach to this challenge. In this regard, great attention has been paid in the last years towards the development of photoanodes for the water oxidation to dioxygen. However, this reaction still constitutes a major challenge due to its strict kinetic requirements and strategies have been recently envisioned to replace water oxidation with more favorable reactions. [2] Within this framework, the present study targets the investigation of two different cyclometallated iridium complexes featuring highly positive oxidation potentials as sensitizers onto TiO 2 electrodes for the light-driven oxidation of organics into added-value products. In particular, two different processes have been considered, namely the oxidation of benzyl alcohol to benzaldehyde [3] and a Diels-Alder reaction. [4] The critical role of the sensitizer in the formation of the target products will be examined in details by combining photoelectrochemical measurements and optical spectroscopy. References 1. C. Wang, M. Amiri, R. T. Endean, O. Martinez Perez, S. Varley, B. Rennie, L. Rasu, S. H. Bergens, ACS Appl. Mater. Interfaces 2018 , 10, 24533−24542. 2. M. Natali, A. Sartorel, A. Ruggi, Front. Chem. 2022 , 10, 1-8. 3. G. Di Carlo, C. Albanese, A. Molinari, S. Carli, R. Argazzi, A. Minguzzi, F. Tessore, E. Marchini, S. Caramori, ACS Appl. Mater. Interfaces 2024 , 16, 14864−14882. 4. M. D. Turlington, S. Ahmed, K. S. Schanze, ACS Catal. 2024 , 14, 12512−12517
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