Distinct critical fluctuations and molecular motions manifest in a model biomembrane

摘要

Lattice dynamics in bis-(n-C16H37NH3)(2)SnCI6. where the hydrocarbon part is analogous to lipid membrane. was investigated by means of 200 MHz H-1 nuclear magnetic resonance. As a result. critical fluctuations and molecular dynamics associated With the phase transitions, an order-disorder and a conformational phase transition, were distinguished in a wide temperature range. The dynamical origin of the critical fluctuations, observed in the long-chain compounds but not in the short-chain compounds. by the laboratory frame spin-lattice relaxation measurements. is revealed and discussed in this work. (C) 2004 Elsevier Ltd. All rights reserved.