Figure 2.

A) Structure of 1. B) Energy level diagram of a p-type NiO photocathode sensitized with 1, in presence of [Co(NH₃)₅Cl]Cl₂ as sacrificial electron acceptor (SEA) in solution. C) UV-vis (dashed line) and normalized fluorescence (solid line, excitation at 420 nm) spectra of 1 measured in MeCN at a concentration of 5 μM. D) Cyclic voltammogram of compound 1 (1 mM) recorded at a scan rate of 100 mV·s⁻¹ on a glassy carbon electrode in CH₃CN containing 0,1 M nBu₄NPF₆ as supporting electrolyte.