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: | Arruda, Eduardo Guimarães Ratier de, 1990, Jannuzzi, Sergio Augusto Venturinelli, 1987, Gonsales, Stella de Almeida, 1987, Timm, Ronaldo Adriano, Sharma, Surender Kumar, 1976, Kubota, Lauro Tatsuo, 1964, Knobel, Marcelo, 1968, Formiga, André Luiz Barboza, 1978 |
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| Přispěvatelé: | UNIVERSIDADE ESTADUAL DE CAMPINAS |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Repositório da Produção Científica e Intelectual da Unicamp Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP |
| Popis: | Agradecimentos: This work was supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) [Grant Nos. 402627/2012-1, 202911/2014-4 and 131848/2013-5]; the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) [Grant Nos. 2012/12773-1 and 2013/22127-2]; the Instituto Nacional de C,T & I em Materiais Complexos Funcionais (INOMAT); the Nanomaterials and Nanotechnologies for Environment Protection and Sustainable Future (NanoEnviCz) [Grant No. LM2015073]; the Centro Nacional de Processamento de Alto Desempenho em São Paulo (CENAPAD-SP) 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 CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP Fechado |
| Databáze: | OpenAIRE |
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