Ultra-Fast Molecular Rotors within Porous Organic Cages.
Chemistry
; 23(68): 17217-17221, 2017 Dec 06.
Article
em En
| MEDLINE
| ID: mdl-29053892
ABSTRACT
Using variable temperature 2 H static NMR spectra and 13 C spin-lattice relaxation times (T1 ), we show that two different porous organic cages with tubular architectures are ultra-fast molecular rotors. The central para-phenylene rings that frame the "windows" to the cage voids display very rapid rotational rates of the order of 1.2-8×106 â
Hz at 230â
K with low activation energy barriers in the 12-18â
kJ mol-1 range. These cages act as hosts to iodine guest molecules, which dramatically slows down the rotational rates of the phenylene groups (5-10×104 â
Hz at 230â
K), demonstrating potential use in applications that require molecular capture and release.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Reino Unido