Preparation of a novel organic derivative of the layered perovskite bearing HLaNb{sub 2}O{sub 7}.nH{sub 2}O interlayer surface trifluoroacetate groups
- Department of Applied Chemistry, School of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo 169-8555 (Japan)
Trifluoroacetate (TFA, CF{sub 3}COO) groups have been successfully bound to the interlayer surface of a protonated form of Dion-Jacobson-type layered perovskite, HLaNb{sub 2}O{sub 7}.nH{sub 2}O (HLaNb), via a reaction between its n-propoxy derivative and trifluoroacetic acid (TFAH, CF{sub 3}COOH). The interlayer distance increases approximately to 1.8 nm upon treatment with TFAH, and varies in the range from {approx}1.7 to {approx}2.0 nm depending on the amount of water adsorbed in the interlayer space. The high stability of the guest species upon dispersal in organic solvents and the change in the infrared (IR) spectrum profile with respect to that of TFAH indicate that the guest species are TFA groups bound to the surface of perovskite-like slabs of HLaNb. The interlayer distance indicates that the TFA groups possess a bilayer arrangement, and a unidentate type of coordination is proposed based on consideration on the coordination geometry.
- OSTI ID:
- 20891667
- Journal Information:
- Materials Research Bulletin, Vol. 41, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2005.10.004; PII: S0025-5408(05)00379-X; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
Preparation and neutron diffraction study of Dion-Jacobson type oxynitrides LiLaTa{sub 2}O{sub 7−3x}N{sub 2x} (x = 0.09, 0.29)
Development and application of a method for analyzing trifluoroacetic acid in environmental samples