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

Author(s)

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

• Document type: Journal article
• Source: Inorganica Chimica Acta; v. 466, p. 456-463, SEP 2017.
• Web of Science Citations: 6

Abstract

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)

• FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
• Grantee: Lauro Tatsuo Kubota
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 12/12773-1 - Development of sensors based on graphene and its derivatives decorated with gold nanoparticles and porphyrins
• Grantee: Ronaldo Adriano Timm
• Support Opportunities: Scholarships in Brazil - Post-Doctoral