Novel Heteroleptic Ruthenium(II) Complexes with 2,2'- Bipyridines Containing a Series of Electron-Donor and Electron-Acceptor Substituents in 4,4'-Positions: Syntheses, Characterization, and Application as Sensitizers for ZnO Nanowire-Based Solar Cells.

Autor: Salomón FF; INQUINOA (UNT- CONICET), Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, (T4000INI) San Miguel de Tucumán, Argentina., Vega NC; INQUINOA (UNT- CONICET), Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, (T4000INI) San Miguel de Tucumán, Argentina., Parella T; Servei de RMN, Universitat Autonóma de Barcelona, Bellaterra E-08193, Barcelona, Spain., Morán Vieyra FE; INBIONATEC (UNSE-CONICET), Universidad Nacional de Santiago del Estero, RN 9, Km 1125, (4206) Santiago del Estero, Argentina., Borsarelli CD; INBIONATEC (UNSE-CONICET), Universidad Nacional de Santiago del Estero, RN 9, Km 1125, (4206) Santiago del Estero, Argentina., Longo C; Institute of Chemistry, University of Campinas, UNICAMP, C. Postal 6154, 13083-970 Campinas, Sao Paulo, Brazil., Cattaneo M; INQUINOA (UNT- CONICET), Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, (T4000INI) San Miguel de Tucumán, Argentina., Katz NE; INQUINOA (UNT- CONICET), Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, (T4000INI) San Miguel de Tucumán, Argentina.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2020 Apr 02; Vol. 5 (14), pp. 8097-8107. Date of Electronic Publication: 2020 Apr 02 (Print Publication: 2020).
DOI: 10.1021/acsomega.0c00243
Abstrakt: A novel series of complexes of the formula [Ru(4,4'-X 2 -bpy) 2 (Mebpy-CN)](PF 6 ) 2 (X = -CH 3 , -OCH 3 , -N(CH 3 ) 2 ; Mebpy-CN = 4-methyl-2,2'-bipyridine-4'-carbonitrile) have been synthesized and characterized by spectroscopic, electrochemical, and photophysical techniques. Inclusion of the electron-withdrawing substituent -CN at one bpy ligand and different electron-donor groups -X at the 4,4'-positions of the other two bpy ligands produce a fine tuning of physicochemical properties. Redox potentials, electronic absorption maxima, and emission maxima correlate well with Hammett's σ p parameters of X. Quantum mechanical calculations are consistent with experimental data. All the complexes can be anchored through the nitrile moiety of Mebpy-CN over ZnO nanowires in dye-sensitized solar cells that exhibit an improvement of light to electrical energy conversion efficiency as the electronic asymmetry increases in the series.
Competing Interests: The authors declare no competing financial interest.
(Copyright © 2020 American Chemical Society.)
Databáze: MEDLINE
Externí odkaz: