From monomers to geometry-constrained molecules: One step further toward cyanide bridged wires

We report on the synthesis and properties of a family of linear cyanide bridged mixed-valence heptanuclear complexes with the formula: trans-[L 4RuII{(μ-NC)FeIII(NC)4(μ-CN) RuIIL′4(μ-NC)FeIII(CN) 5}2]6- (with L and L′ a para substituted pyridine). We also report on the properties of a related pentan...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2009
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201669_v48_n23_p11226_Albores
http://hdl.handle.net/20.500.12110/paper_00201669_v48_n23_p11226_Albores
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00201669_v48_n23_p11226_Albores
record_format dspace
spelling paper:paper_00201669_v48_n23_p11226_Albores2023-06-08T14:40:37Z From monomers to geometry-constrained molecules: One step further toward cyanide bridged wires We report on the synthesis and properties of a family of linear cyanide bridged mixed-valence heptanuclear complexes with the formula: trans-[L 4RuII{(μ-NC)FeIII(NC)4(μ-CN) RuIIL′4(μ-NC)FeIII(CN) 5}2]6- (with L and L′ a para substituted pyridine). We also report on the properties of a related pentanuclear complex. These oligomers were purified by size exclusion chromatography, characterized by electrospray ionization (ESI) mass spectrometry and elemental analysis, and their linear shape was confirmed by scanning tunneling microscopy (STM). These complexes present a rich electrochemistry associated with the seven redox active centers. The redox potential split of identical fragments indicates that there is considerable communication along the cyanide bridged backbone of the compounds, even for centers more than 3 nm apart. This small attenuation of the interaction at long distances make these cyanide bridged compounds good candidates for molecular wires. Interestingly, the extent of the communication depends on the relative energy of the fragments, as evaluated by their redox potentials, providing a guide for improvement of this interesting property. © 2009 American Chemical Society. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201669_v48_n23_p11226_Albores http://hdl.handle.net/20.500.12110/paper_00201669_v48_n23_p11226_Albores
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We report on the synthesis and properties of a family of linear cyanide bridged mixed-valence heptanuclear complexes with the formula: trans-[L 4RuII{(μ-NC)FeIII(NC)4(μ-CN) RuIIL′4(μ-NC)FeIII(CN) 5}2]6- (with L and L′ a para substituted pyridine). We also report on the properties of a related pentanuclear complex. These oligomers were purified by size exclusion chromatography, characterized by electrospray ionization (ESI) mass spectrometry and elemental analysis, and their linear shape was confirmed by scanning tunneling microscopy (STM). These complexes present a rich electrochemistry associated with the seven redox active centers. The redox potential split of identical fragments indicates that there is considerable communication along the cyanide bridged backbone of the compounds, even for centers more than 3 nm apart. This small attenuation of the interaction at long distances make these cyanide bridged compounds good candidates for molecular wires. Interestingly, the extent of the communication depends on the relative energy of the fragments, as evaluated by their redox potentials, providing a guide for improvement of this interesting property. © 2009 American Chemical Society.
title From monomers to geometry-constrained molecules: One step further toward cyanide bridged wires
spellingShingle From monomers to geometry-constrained molecules: One step further toward cyanide bridged wires
title_short From monomers to geometry-constrained molecules: One step further toward cyanide bridged wires
title_full From monomers to geometry-constrained molecules: One step further toward cyanide bridged wires
title_fullStr From monomers to geometry-constrained molecules: One step further toward cyanide bridged wires
title_full_unstemmed From monomers to geometry-constrained molecules: One step further toward cyanide bridged wires
title_sort from monomers to geometry-constrained molecules: one step further toward cyanide bridged wires
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201669_v48_n23_p11226_Albores
http://hdl.handle.net/20.500.12110/paper_00201669_v48_n23_p11226_Albores
_version_ 1768546191595798528

Ejemplares similares