Development of novel pillared clays for the encapsulation of inorganic complexes

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Pires, J (Author) Other; Francisco, J (Author) Other; Carvalho, A (Author) Other; de Carvalho, MB (Author) Other; Silva, AR (Author) Other; Freire, C (Author) FCUP; de Castro, B (Author) FCUP

Journal

Title: Langmuir

Vol. 20

Pages: 2861-2866

ISSN: 0743-7463

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 18 Citations

Scopus - 17 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-000-B55

DOI: 10.1021/la0357209

Abstract (EN): Several pillared clays were prepared by using a polyalcohol (ethylene glycol or poly(vinyl alcohol)) or a poly(ethylene oxide) surfactant as an interlayer gallery template and an aluminum oligomer species as the pillaring agent. The use of polyalcohols or nonionic surfactants, such as Tergitol, gave materials which, in general, presented larger basal spacing than those found for the solids prepared by a similar procedure but without additives. The initial positive effect in the expansion of the clay interlayers was not totally retained after calcination of the materials; most probably, at the end, the basal spacing is still ruled by the intercalating aluminum species. The pillared clay with the largest basal spacing and specific surface area was used to encapsulate copper(II) complexes with pentadentate N3O2 Schiff base ligands derived from copper(II) acetylacetonate by in situ synthesis. The characterization made (X-ray diffraction, X-ray photoelectron spectroscopy, FTIR spectroscopy, chemical analysis, and low-temperature N-2 adsorption) provided evidence that copper(II) complexes with pentadentate N3O2 Schiff base ligands were efficiently entrapped within the lower dimension pores of the pillared clay and that they interact strongly with the pillared clay matrix.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6