Methyl ester functionalized phenalenyl arene- and bipyridine-ruthenium-based complexes for electroactive Langmuir-Blodgett films

Isis Mani Wahl, Eduard Westphal, Tiago Leyser Da Costa Gouveia, Francielli Sousa Santana, David L. Hughes, Ronny R. Ribeiro, Leonardo Henrique Ribeiro Piccoli, Herbert Winnischofer

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
10 Downloads (Pure)


We report the synthesis of a new phenalenyl ligand, functionalized with a methyl ester electron withdrawing group, named 9-hydroxy-1-oxo-1H-phenalen-5-methyl carboxylate (L), and the generated complexes [Ru(bpy)2L]PF6 and [(η6-C6H6)Ru(L)Cl]. Compounds were characterized by spectroscopic and X-ray diffraction methods, and their electrochemical behavior was investigated via cyclic voltammetry and UV-vis spectroelectrochemistry. The one-electron oxidized compounds have an unpaired electron located in the phenalenyl ring, as supported by theoretical calculations (DFT) and EPR results. Langmuir-Blodgett (LB) films deposited by [Ru(bpy)2L]2+/3+ species mixed with stearic acid are electroactive, showing a quasi-reversible wave with E1/2Film1 = 0.74 V and E1/2Film2 = 0.81, which are promising systems that allow access to immobilized open-shell species in the film.

Original languageEnglish
Pages (from-to)8408-8418
Number of pages11
JournalInorganic Chemistry
Issue number13
Early online date19 Jun 2019
Publication statusPublished - 1 Jul 2019

Cite this