Synthesis, structural and magnetic characterization of a copper(II) complex of 2,6-di(1H-imidazol-2-yl) pyridine and its application in copper-mediated polymerization catalysis

Autor(es)

Ratier de Arruda, Eduardo Guimaraes ; de Farias, Marcelo Alexandre ; Venturinelli Jannuzzi, Sergio Augusto ; Gonsales, Stella de Almeida ; Timm, Ronaldo Adriano ; Sharma, Surender ; Zoppellaro, Giorgio ; Kubota, Lauro Tatsuo ; Knobel, Marcelo ; Barboza Formiga, Andre Luiz

• Tipo de documento: Artigo Científico
• Fonte: Inorganica Chimica Acta; v. 466, p. 456-463, SEP 2017.
• Citações Web of Science: 6

Resumo

The 2,6-di(1H-imidazol-2-yl) pyridine (H(2)dimpy) ligand is synthesized and suggested as an alternative ligand for copper mediated catalysis. A Cu(II) complex was obtained with this ligand and characterized via ESI-MS, FT-IR, UV-vis and the structure was confirmed by single crystal XRD. The crystal showed the {[}Cu-2(H(2)dimpy)(2)(mu-Cl)(2)] (PF6)(2)] center dot 2H(2)O dimeric complex, in which Cu(II) is in a distorted square-pyramidal geometry (tau = 0.301). Ferromagnetic coupling with J = -11.1 cm(-1) was confirmed by experiment and corroborated by density functional calculations. In order to evaluate the applicability of H(2)dimpy in atom transfer radical polymerization (ATRP), polystyrene was produced in DMF solution at low polydispersity (1.3) while maintaining the livingness of the polymer chain. The good performance of the H(2)dimpy compared to a standard ligand for ATRP (5,5'-dimethyl-2,2'-dipyridyl) indicates that it is suitable for this reaction. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados
• Beneficiário: Lauro Tatsuo Kubota
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/12773-1 - Desenvolvimento de sensores baseados em grafeno e seus derivados, decorados com nanopartículas de ouro e porfirinas
• Beneficiário: Ronaldo Adriano Timm
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado