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Niobium Oxide Mesophases Obtained by Self‐Assembly of an Aqueous Soluble Niobium Complex Precursor and Organic Templates
Author(s) -
Bizeto Marcos A.,
Constantino Vera R. L.
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200600529
Subject(s) - mesophase , chemistry , niobium , niobium oxide , oxide , micelle , bromide , hydrolysis , inorganic chemistry , lamellar structure , aqueous solution , self assembly , chemical engineering , organic chemistry , crystallography , phase (matter) , engineering
In this paper the use of triammonium trioxalato(oxido)niobate {(NH 4 ) 3 [NbO(C 2 O 4 ) 3 ]} as an inorganic precursor to assemble organized hybrid niobium oxide mesophases using n ‐octylamine (OCT) and cetyltrimethylammonium (CTA) bromide as structure‐directing agents is described for the first time. The niobium complex is water‐soluble and its hydrolysis at controlled pH and in the presence of organic templates leads to the formation of hybrid mesophases. A lamellar mesophase is produced by a neutral route based on the interaction of hydrolyzed units with the octylamine micelles. On the other hand, a hexagonal ( p 6 m ) mesophase is obtained when hydrolyzed species interact with CTA micelles through a charge‐matching route (ionic route). This is the first time that such an ionic route has been described for the production of organized niobium oxide hybrids.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)