GUEST-HOST INTERACTIONS IN LAYERED INTERCALATION COMPOUNDS STUDIED BYNMR

Solid state H-1, H-2 and Nb-96 NMR methods have provided a probe of gu est-host bonding and of the electric and magnetic environment of these nuclei in layered intercalation compounds of the type Kx(H2O)y[NbS2]. Structural changes have been studied as a function of the degree of i ntercalation x. Niobium nuclei have been used to detect environmental effects caused by the intercalant. Properties of the host lattice have been investigated by nuclear probes of the guest molecules. Three int ercalation structures have been observed as a function of x, which wer e attributed to local staging. Electronic properties of the host have been found to be closely related to the chemical shift anisotropy of g uest nuclei.