1. Dynamics and packing mode of long-chained n-alkane molecules in the nano-channel of MCM-41
- Author
-
Masaharu Okazaki, Sambandam Anandan, and Kazumi Toriyama
- Subjects
Alkane ,chemistry.chemical_classification ,Chemistry ,Stereochemistry ,Spin–lattice relaxation ,General Physics and Astronomy ,chemistry.chemical_element ,Carbon-13 NMR ,Spectral line ,Amorphous solid ,Crystallography ,Nano ,Molecule ,Physics::Chemical Physics ,Physical and Theoretical Chemistry ,Carbon - Abstract
High-resolution solid-state 13C NMR spectra of long-chained n-alkanes included in the nano-channel of MCM-41 have been observed. Each spectrum has two sets of peaks: one from very flexible molecules and the other from molecules with no significant flexibility. These molecules are characterized by carbon spin lattice relaxation times, T1, of 10 s, respectively. This phenomenon is ascribed to phase separation of the alkanes in the nano-channel, i.e., the amorphous and crystalline phases, respectively. The mechanism of this phase separation and the dynamics of these molecules in the nano-channel are discussed.
- Published
- 2005