Synthesis of Ruthenium Tris-Diimine Photosensitizers Substituted by Four Methylphosphonate Anchoring Groups for Dye-Sensitized Photoelectrochemical Cell Applications

Nicolas Queyriaux (1) , Emmanouil Giannoudis (1) , Jean-François Lefebvre (1, 2) , Vincent Artero (1) , Murielle Chavarot-Kerlidou (1)

1 SolHyCat - Solar fuels, hydrogen and catalysis
2 DPM

The design and synthesis of ruthenium tris-diimine photosensitizers appropriately functionalized to be (i) anchored onto transparent conductive oxides (TCO) and (ii) covalently coupled with a water-splitting catalyst represents an important target for solar fuel production in dye-sensitized photoelectrochemical cells (DS-PECs). In this study, two different synthetic routes to prepare heteroleptic [Ru(4,4 '-(CH2PO3Et2)(2)-bpy)(2)((NN)-N-<^>)](PF6)(2) complexes are evaluated, the scope and limitations of the organometallic pathway involving half-sandwich eta(6)-arene ruthenium complexes as synthetic intermediates being especially studied. The spectroscopic and electrochemical characterization of a series of novel structures varying by the nature of the third diimine (NN)-N-<^> ligand is reported.

Mots clés: Anchoring groups; Photosensitizers; Ruthenium; Photoelectrochemistry

Domaines: Chimie inorganique

Nicolas Queyriaux, Emmanouil Giannoudis, Jean-François Lefebvre, Vincent Artero, Murielle Chavarot-Kerlidou. Synthesis of Ruthenium Tris-Diimine Photosensitizers Substituted by Four Methylphosphonate Anchoring Groups for Dye-Sensitized Photoelectrochemical Cell Applications. European Journal of Inorganic Chemistry, 2019, 2019 (15 Spécial Issue), pp.2154-2161. ⟨10.1002/ejic.201900151⟩. ⟨hal-02152654⟩