Methoxy-substituted copper complexes as possible redox mediators in dye-sensitized solar cells

Three aromatic diimine ligands and the corresponding homoleptic copper(i) and copper(ii) complexes have been synthesized and characterized. The copper(ii) derivatives are stabilized by an ancillary chlorido ligand. The nature of the chelating ligand seriously impacts the photophysical and electroche...

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Veröffentlicht in:New journal of chemistry Jg. 45; H. 34; S. 15303 - 15311
Hauptverfasser: Giordano, Marco, Volpi, Giorgio, Bonomo, Matteo, Mariani, Paolo, Garino, Claudio, Viscardi, Guido
Format: Journal Article
Sprache:Englisch
Veröffentlicht: CAMBRIDGE Royal Soc Chemistry 14.09.2021
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ISSN:1144-0546, 1369-9261
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Abstract Three aromatic diimine ligands and the corresponding homoleptic copper(i) and copper(ii) complexes have been synthesized and characterized. The copper(ii) derivatives are stabilized by an ancillary chlorido ligand. The nature of the chelating ligand seriously impacts the photophysical and electrochemical properties of the complexes. The substitution of the pendant methyl groups with methoxy influences the coordination geometry of the complexes, resulting in an intramolecular dynamic equilibrium between different coordination modes (i.e. nitrogen and oxygen binding), proved by variable-temperature H-1-NMR measurements. As a proof of concept, the most promising complexes were employed as redox mediators in semi-transparent dye-sensitized solar cells. Once implemented in devices, the nature of the ligand plays a crucial role: the methoxy-substituted derivatives appear upon severe ligand exchange with tert-butylpyridine, resulting in an unexpectedly high open circuit voltage.
AbstractList Three aromatic diimine ligands and the corresponding homoleptic copper(i) and copper(ii) complexes have been synthesized and characterized. The copper(ii) derivatives are stabilized by an ancillary chlorido ligand. The nature of the chelating ligand seriously impacts the photophysical and electrochemical properties of the complexes. The substitution of the pendant methyl groups with methoxy influences the coordination geometry of the complexes, resulting in an intramolecular dynamic equilibrium between different coordination modes (i.e. nitrogen and oxygen binding), proved by variable-temperature H-1-NMR measurements. As a proof of concept, the most promising complexes were employed as redox mediators in semi-transparent dye-sensitized solar cells. Once implemented in devices, the nature of the ligand plays a crucial role: the methoxy-substituted derivatives appear upon severe ligand exchange with tert-butylpyridine, resulting in an unexpectedly high open circuit voltage.
Author Mariani, Paolo
Bonomo, Matteo
Viscardi, Guido
Giordano, Marco
Volpi, Giorgio
Garino, Claudio
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  surname: Viscardi
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  organization: Univ Turin, NIS Interdept Ctr, Dept Chem, Turin, Italy
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Issue 34
Keywords ELECTRON-TRANSFER
TRANSITION-METAL-COMPLEXES
LIGANDS
PHENANTHROLINE
COUPLE
LIGHT
COORDINATION
MODEL COMPLEXES
CHARGE-TRANSFER
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Snippet Three aromatic diimine ligands and the corresponding homoleptic copper(i) and copper(ii) complexes have been synthesized and characterized. The copper(ii)...
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Index Database
StartPage 15303
SubjectTerms Chemistry
Chemistry, Multidisciplinary
Physical Sciences
Science & Technology
Title Methoxy-substituted copper complexes as possible redox mediators in dye-sensitized solar cells
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