Multinuclear Magnetic Resonance Studies on Aqueous Suspensions of Synthetic Saponites

Interaction of a Zwitterionic Surfactant with Synthetic Clays in Aqueous Suspensions: A Multinuclear Magnetic Resonance Study

“…100 kHz), the 23 Na NMR spectrum of laponite suspensions exhibits one single line accounting for 40% of the total intensity (18). This observation has been also confirmed with other clays (25). Thus, only the central line (m = ±1/2 transition) is observed.…”

Interaction of Poly(ethylene glycol) Monoalkyl Ethers with Synthetic Saponites in Aqueous Suspensions: A Multinuclear Magnetic Resonance Study

“…Previously, we have used NMR methods to describe the behavior of molecules and cationic species at the clay−liquid interface. − More recently, we have applied these techniques to aqueous suspensions of synthetic saponites with different layer charges …”

A Multinuclear Magnetic Resonance Study of Synthetic Clays Suspended in Water and in Dodecyldimethylamine Oxide Solutions

“…Sodium counterions of the investigated clays dispersed in water are only partly NMR visible. The central line (narrow component) is only observed (19,25), as the signal accounts for ca. 40% of the intensity (22,24).…”