| Autor: |
Wahl IM; Departamento de Química , Universidade Federal do Paraná , 81530-900 , Curitiba - Paraná , Brazil., Westphal E; Departamento Acadêmico de Química e Biologia , Universidade Tecnológica Federal do Paraná , 81280-340 , Curitiba - Paraná , Brazil., Leyser da Costa Gouveia T; Departamento de Química , Universidade Federal do Paraná , 81530-900 , Curitiba - Paraná , Brazil., Santana FS; Departamento de Química , Universidade Federal do Paraná , 81530-900 , Curitiba - Paraná , Brazil., Hughes DL; School of Chemistry , University of East Anglia , Norwich NR4 7TJ , United Kingdom., Ribeiro RR; Departamento de Química , Universidade Federal do Paraná , 81530-900 , Curitiba - Paraná , Brazil., Piccoli LHR; Departamento de Química , Universidade Federal do Paraná , 81530-900 , Curitiba - Paraná , Brazil., Winnischofer H; Departamento de Química , Universidade Federal do Paraná , 81530-900 , Curitiba - Paraná , Brazil. |
| Abstrakt: |
We report the synthesis of a new phenalenyl ligand, functionalized with a methyl ester electron withdrawing group, named 9-hydroxy-1-oxo-1 H-phenalen-5-methyl carboxylate (L), and the generated complexes [Ru(bpy) 2 L]PF 6 and [(η 6 -C 6 H 6 )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) 2 L] 2+/3+ species mixed with stearic acid are electroactive, showing a quasi-reversible wave with E 1/2 Film1 = 0.74 V and E 1/2 Film2 = 0.81, which are promising systems that allow access to immobilized open-shell species in the film. |
