Interlayer dynamics of a fatty acid exchanged lithium alumium layered double hydroxide monitored by infrared spectroscopy and pyrene fluorescence

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Langmuir; (United States)

DOI:https://doi.org/10.1021/la00024a048· OSTI ID:6617809

Dutta, P K; Robins, D S ^[1]

---

1. Ohio State Univ., Columbus, OH (United States)

The interlayers of layered metal double hydroxides provide a novel environment for arrangement of molecular species as well as their reactions. In this study, we report on a system which has a dense packing of myristic acid molecules (CH[sub 3](CH[sub 2])[sub 12]COOH) in a Li-Al layered double hydroxide (LiAl[sub 2](OH)[sub 6][sup +]), the acid chains being aligned perpendicular to the metal hydroxide layer. This hydrophobic interlayer space acts as a partition medium for molecules like pyrene, which retain enough mobility to form excimers. The interlayer space is also solvated with ethanol. Upon heating the myristic acid exchanged sample, the interlayers separate making room for the solvent to escape. This leads to realignment of the myristic acid chains. The chains become considerably more rigid in the absence of ethanol and this leads to the stabilization of the expanded interlayer. Resolvation makes the chains mobile and leads rapidly to recovery of the properties of the as-synthesized material. 31 refs., 11 figs.

• OSTI ID: 6617809
• Journal Information: Langmuir; (United States), Vol. 10:12; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
ALUMINIUM HYDROXIDES
INFRARED SPECTRA
LITHIUM HYDROXIDES
ETHANOL
FLUORESCENCE
LAYERS
METHANOL
PYRENE
TETRADECANOIC ACID
X-RAY DIFFRACTION
ALCOHOLS
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
AROMATICS
CARBOXYLIC ACIDS
COHERENT SCATTERING
CONDENSED AROMATICS
DIFFRACTION
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
LITHIUM COMPOUNDS
LUMINESCENCE
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SCATTERING
SPECTRA
400201* - Chemical & Physicochemical Properties
400102 - Chemical & Spectral Procedures
360602 - Other Materials- Structure & Phase Studies