Asymmetric heterobimetallic mixed-valence complex trans-[(SO3)Co(cyclam)(NCS)Ru(NH3)4(NCS)](BF4): Synthesis and characterization

Silva, Maria Aparecida S.; Paulo, Tércio F.; Pinheiro, Solange de Oliveira; Batista, Alzir A.; Ellena, Javier; Sousa, Eduardo Henrique Silva; Lopes, Luiz Gonzaga de França; Diógenes, Izaura C.N.

doi:10.1016/j.poly.2011.05.019

Cited by 2 publications

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“…As a consequence, the synthesis and characterization of several linear systems based on coordination complexes have been reported lately. 10,[17][18][19] Focusing on the production of molecular wires, many synthetic approaches have tried to prepare oligonuclear transition metal complexes with different degrees of electronic coupling between their constituents; hence, their design relies on the known properties of binuclear complexes.…”

Section: Introductionmentioning

confidence: 99%

Mixed-valence state of symmetric diruthenium complexes: synthesis, characterization, and electron transfer investigation

Pinheiro¹,

Paulo²,

Abreu³

et al. 2012

Dalton Trans.

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Complexes of the type {[( pyS)Ru(NH 3 ) 4 ] 2 -μ-L}n , where pyS = 4-mercaptopyridine, L = 4,4′-dithiodipyridine ( pySSpy), pyrazine ( pz) and 1,4-dicyanobenzene (DCB), and n = +4 and +5 for fully reduced and mixed-valence complexes, respectively, were synthesized and characterized. Electrochemical data showed that there is electron communication between the metal centers with comproportionation constants of 33.2, 1.30 × 10 8 and 5.56 × 10 5 for L = pySSpy, pz and DCB, respectively. It was also observed that the electronic coupling between the metal centers is affected by the π-back-bonding interaction toward the pyS ligand. Raman spectroscopy showed a dependence of the intensity of the vibrational modes on the exciting radiations giving support to the assignments of the electronic transitions. The degree of electron communication between the metal centers through the bridging ligands suggests that these systems can be molecular wire materials.

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Section: Introductionmentioning

confidence: 99%