The low temperature inelastic neutron scattering cross-section of p-tert-butylcalix[4]arene(1:1)toluene shows several bands between 0.16 and 2.55 meV, which are interpreted as due to transitions between tunneling-split librational states of the methyl group belonging to the toluene molecule. The rotational barrier provided by the host lattice is particularly small so that the system approaches the behaviour of a quantum-mechanically free rotor.
An almost free methyl quantum rotor in p-tert-butylcalix [4] arene(1:1)toluene / Caciuffo, ROBERTO GIOVANNI MARIA; Francescangeli, Oriano; S., Melone; M., Prager; F., Ugozzoli; G. D., Andreetti; G., Amoretti; G., Coddens; H., Blank. - In: PHYSICA. B, CONDENSED MATTER. - ISSN 0921-4526. - 180-181:(1992), pp. 691-693. [10.1016/0921-4526(92)90436-V]
An almost free methyl quantum rotor in p-tert-butylcalix [4] arene(1:1)toluene
CACIUFFO, ROBERTO GIOVANNI MARIA;FRANCESCANGELI, ORIANO;
1992-01-01
Abstract
The low temperature inelastic neutron scattering cross-section of p-tert-butylcalix[4]arene(1:1)toluene shows several bands between 0.16 and 2.55 meV, which are interpreted as due to transitions between tunneling-split librational states of the methyl group belonging to the toluene molecule. The rotational barrier provided by the host lattice is particularly small so that the system approaches the behaviour of a quantum-mechanically free rotor.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
