Copper acetylacetonate anchored onto amine-functionalised clays

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Clara Pereira (Author) Other; Sonia Patricio (Author) Other; Ana Rosa Silva (Author) REIT; Alexandre L Magalhaes (Author) FCUP; Ana Paula Carvalho (Author) Other; Joao Pires (Author) Other; Cristina Freire (Author) FCUP

Journal

Title: Journal of Colloid and Interface Science

Vol. 316

Pages: 570-579

ISSN: 0021-9797

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 67 Citations

Scopus - 71 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-004-5RH

DOI: 10.1016/j.jcis.2007.07.053

Abstract (EN): Copper (11) acetylacetonate was immobilised directly onto two clays, laponite (Lap) and K10-montmorillonite (K10), and after their amine functionalisation with (3-aminopropyl)triethoxysilane (APTES). All the materials were characterised by nitrogen adsorption isotherms at -196 degrees C, elemental analysis, TG-DSC, XRD, and IR spectroscopy. The K10-based materials were also characterised by XPS. The APTES-functionalised K10 showed higher copper loading than K10, indicating that the clay functionalisation enhanced the complex immobilisation; on the contrary, in Lap-based materials higher metal content was obtained by direct complex anchoring, probably due to the delaminated nature of Lap which induced the particles aggregation on functionalisation with APTES. All the results pointed out that the Cu complex was anchored onto the amine-functionalised clays by Schiff condensation between the amine groups of anchored APTES and the carbonyl groups of the acetylacetonate ligand, whereas direct immobilisation proceeded mostly through interaction between the metal centre and the clay surface hydroxyl groups.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10