PL05. A. Macchioni – Organoiridium Complexes as Catalysts Relevant to the Photosynthesis of Solar Fuels

Effectenbeurszaal, ground floor July 13, 2017 09:00 - 09:50

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Prof. Dr. Alceo Macchioni

Macchioni, A.; Bucci, A.; Fagiolari, L.; Menendez R., G.; Zuccaccia, C.
Department of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di Sotto 8, 06123 – Perugia, Italy

The photosynthesis of solar fuels from abundant raw materials is considered one of the most promising strategies to sustain the increasing worldwide level of energy consumption of our society [1]. Inspiration for constructing an efficient photosynthetic apparatus has traditionally derived from Nature, who has developed two catalytic pools that offer viable kinetic pathways to both the oxidation of water (oxygen evolving complex) and generation of NAD(P)H [NAD(P)+ ferredoxin reductase]; NAD(P)H is successively used to reduce CO2 in light-independent reactions.

Figure 1 Water oxidation (SO = Sacrificial Oxidant) and NAD+/NADH transformations mediated by iridium organometallic complexes.

Many organometallic complexes have been successfully exploited to independently catalyze water oxidation (WO) [2], hydrogenation of NAD+, and dehydrogenation of NADH [3]. In this contribution, our results aimed at developing homogeneous [2] and heterogenized [4] WOCs, as well as single organoiridium complexes, which can efficiently catalyze both WO and NAD+/NADH transformations, are reported (Figure 1).

[1] Armaroli, N. and Balzani, V., Chem. Eur. J. 22 (2016), 32.
[2] Menendez Rodriguez, G., Bucci, A., Hutchinson, R., Bellachioma, G., Zuccaccia, C., Giovagnoli, S., Idriss, H. and Macchioni, A., ACS Energy Lett. 2 (2017) 105.
[3] Ganesan, V., Sivanesan, D. and Yoon, S., Inorg. Chem. 56 (2017) 1366.
[4] Pastori, G., Wahab, K., Bucci, A., Bellachioma, G., Zuccaccia, C., Llorca, J., Idriss, H. and Macchioni, A., Chem. Eur. J. 22 (2016) 13459.