Methyl Ester Functionalized Phenalenyl Arene- and Bipyridine-Ruthenium-Based Complexes for Electroactive Langmuir-Blodgett Films

Wahl, Isis Mani, Westphal, Eduard, Leyser Da Costa Gouveia, Tiago, Santana, Francielli Sousa, Hughes, David L., Ribeiro, Ronny R., Piccoli, Leonardo Henrique Ribeiro and Winnischofer, Herbert (2019) Methyl Ester Functionalized Phenalenyl Arene- and Bipyridine-Ruthenium-Based Complexes for Electroactive Langmuir-Blodgett Films. Inorganic Chemistry, 58 (13). pp. 8408-8418. ISSN 0020-1669

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Abstract

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.

Item Type: Article
Uncontrolled Keywords: physical and theoretical chemistry,inorganic chemistry ,/dk/atira/pure/subjectarea/asjc/1600/1606
Faculty \ School: Faculty of Science > School of Chemistry
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Depositing User: LivePure Connector
Date Deposited: 23 Aug 2019 11:30
Last Modified: 14 Jul 2020 23:40
URI: https://ueaeprints.uea.ac.uk/id/eprint/72040
DOI: 10.1021/acs.inorgchem.9b00530

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