New strategies for synthesis and immobilization of methalophtalocyanines onto kaolinite: Preparation, characterization and chemical stability evaluation

Autor(es)

da Silva, Tiago Honorato ; de Souza, Thalita F. M. ; Ribeiro, Anderson Orzari ; Calefi, Paulo Sergio ; Ciuffi, Katia Jorge ; Nassar, Eduardo Jose ; Molina, Eduardo Ferreira ; Hamer, Peter ; de Faria, Emerson Henrique

• Tipo de documento: Artigo Científico
• Fonte: DYES AND PIGMENTS; v. 134, p. 41-50, NOV 2016.
• Citações Web of Science: 4

Resumo

This study presents results concerning the one-step synthesis and immobilization of a metal-lophthalocyanine on kaolinite as support/catalyst. X-ray diffractometry (XRD), nuclear magnetic resonance (NMR) and infrared (FTIR), UV/Visible (UV/Vis) and X-ray photoelectron (XPS) spectroscopies, thermal analyses, textural analyses (BET) and scanning electron microscopy (SEM) aided for the characterization of the materials. The FTIR, XPS and UV/Vis absorption spectra confirmed metallophthalocyanine formation. XRD analysis provided data on the structural disorganization of kaolinite during the synthesis of metallophthalocyanine, corroborated by SEM. NMR revealed that partial dissolution of aluminum from the octahedral kaolinite sheets was possible, which should release Al into the medium and, together with phthalonitrile, promote cyclomerization of the phthalocyanine macrocycle. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 13/19523-3 - Materiais biohíbridos funcionais baseados em argilas lamelares e/ou fibrosas com aplicações multifacetadas
• Beneficiário: Emerson Henrique de Faria
• Linha de fomento: Auxílio à Pesquisa - Regular