Novel microporous lanthanide silicates with tobermorite-like structure

Artur Ferreira; Duarte Ananias; Luís D Carlos; Cláudia M Morais; João Rocha

doi:10.1021/ja036988p

Novel microporous lanthanide silicates with tobermorite-like structure

J Am Chem Soc. 2003 Nov 26;125(47):14573-9. doi: 10.1021/ja036988p.

Authors

Artur Ferreira¹, Duarte Ananias, Luís D Carlos, Cláudia M Morais, João Rocha

Affiliation

¹ Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.

PMID: 14624607
DOI: 10.1021/ja036988p

Abstract

The synthesis and structural characterization of microporous lanthanide silicates (Na(1.08)K(0.5)Ln(1.14)Si(3)O(8.5).1.78H(2)O, Ln = Eu, Tb, Sm, Ce) are reported. The structure of these solids is closely related with the structure of hydrated calcium silicate minerals known as tobermorites and was solved by powder X-ray diffraction ab initio (direct) methods and further characterized by chemical analysis, thermogravimetry, scanning electron microscopy, (23)Na and (29)Si MAS NMR and luminescence spectroscopy. These materials combine microporosity with interesting photoluminescence properties, and their structural flexibility allows fine-tuning of luminescence properties, by introducing a second type of lanthanide ion in the framework. Thus, they may find applications in new types of sensors.