Stark Effects on Rigid-Rotor Wavefunctions: A Quantum Description of Dipolar Rotors Trapped in Electric Fields as Pendulum Oscillators

Autor:	Brad Logsdon, Giles Henderson
Rok vydání:	1995
Předmět:	Physics Field (physics) Rotor (electric) General Chemistry Education law.invention Dipole Classical mechanics law Electric field Quantum mechanics Pendulum (mathematics) Rigid rotor Wave function Harmonic oscillator
Zdroj:	Journal of Chemical Education. 72:1021
ISSN:	1938-1328 0021-9584
DOI:	10.1021/ed072p1021
Popis:	Chemists have had few opportunities to study the effects of molecular orientations on reactions. At ordinary temperatures, it is impractical to orient gas phase molecules with electric fields because their rotational kinetic energies are large compared to the interaction energy of molecular dipoles with accessible laboratory fields. This study uses a variational matrix method and computer graphics to illustrate how orientational probability of molecules cooled by supersonic expansions are dramatically influenced by electric fields. These calculations reveal how free rotor wavefunctions evolve into harmonic oscillator type functions as dipolar molecules become trapped by the laboratory field as Stark pendulum oscillators. A supplement to this article that includes computer animated descriptions of the molecular motions described here are available at JCE Internet.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2fac4de5d2cabf220db621cbb7024fd3 https://doi.org/10.1021/ed072p1021 Zobrazit plný text záznamu