Molecular dynamics of tert-butyl chloride confined in CPG studied by NMR.
The molecular dynamics of tert-butyl chloride (TBC) confined to Controlled Pore Glass matrices of 25 and 7.5 nm were investigated by measuring NMR linewidths, lineshapes, and 1H and 2H spin--lattice relaxation times. The behaviour of confined TBC can be explained assuming that the guest molecules form two distinct phases; the surface-affected phase, composed of molecules located at the pore surface, and the bulk-like phase located at the centre of the pores. The bulk-like component of confined TBC, at the temperatures corresponding to the phase III, is characterized by two dynamically different subphases.
Wasyluk
Lidia
L
Department of Macromolecular Physics, Adam Mickiewicz University, ul. Umultowska 85, 61-614 Poznań, Poland. lidia@hoth.amu.edu.pl
Peplińska
Barbara
B
Jurga
Stefan
S