Microwave-assisted silylation of graphite oxide and iron(III) porphyrin intercalation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Monika E Lipinska (Autor) Outra; Joao P Novais (Autor) Outra; Susana L H Rebelo (Autor) Outra; Belen Bachiller Baeza (Autor) Outra; Inmaculada Rodriguez Ramos (Autor) Outra; Antonio Guerrero Ruiz (Autor) Outra; Cristina Freire (Autor) FCUP

Revista

Título: Polyhedron

Vol. 81

Páginas: 475-484

ISSN: 0277-5387

Editora: Elsevier

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 4 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-009-R3J

DOI: 10.1016/j.poly.2014.07.003

Abstract (EN): The hybrid material graphite oxide (GO) intercalated with an iron(III) porphyrin was obtained upon a silylation reaction of GO with 3-bromotrimethoxypropylsilane (BrTMS) followed by metalloporphyrin immobilization. Diverse reaction conditions and microwave versus conventional heating were tested. The materials were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), thermogravimetry (TGA) and temperature programmed desorption (TPD). Microwave-assisted synthesis allowed functionalization reactions of 1 h instead of 24 h (conventional heating) with equivalent or improved yields on both silylation and metalloporphyrin immobilization reactions. The immobilizations performed in anhydrous solvent and absence of other exfoliation agents led to an increase on the GO interlayer distance of 0.14 nm, in a total space of 7 angstrom that match the metalloporphyrin thickness.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10