Investigations into variations in local cationic environment in layered oxide series InGaO3(ZnO)(m) (m=1-4)

TitleInvestigations into variations in local cationic environment in layered oxide series InGaO3(ZnO)(m) (m=1-4)
Publication TypeJournal Article
Year of Publication2014
AuthorsNarendranath, SB, Yadav, AKumar, Ajithkumar, TG, Bhattacharyya, D, Jha, SNath, Dey, KK, Raja, T, R. Devi, N
JournalDalton Transactions
Volume43
Issue5
Pagination2120-2126
Date PublishedNOV
ISSN1477-9226
Abstract

Layered oxides of the series InGaO3(ZnO)(m) (m = 1-4) are interesting due to their structural anisotropy. Here, we report a comprehensive study of their structural details, focusing on the local cationic environment in bulk powder samples by MASNMR and EXAFS, which is hitherto not attempted. It is found that the Ga geometry varies gradually from pure pentacoordinated to a mixture of penta and tetracoordinated with increasing amounts of tetracoordination as we move across the series, contrary to previous reports suggesting exclusively trigonal bipyramidal coordination in all the compounds. A similar observation is also made in the case of Zn and structural evolution involving the dissolution of Ga in a ZnO4 tetrahedral network in a sandwich layer can be discerned, as the insulating ZnO layer size increases.

DOI10.1039/c3dt52011k
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

4.27

Divison category: 
Catalysis and Inorganic Chemistry
Central NMR Facility