Deuterium Effect on the Pressure Coefficient of the Tunneling Rate in the Acridine−Fluorene Solid-State Photoreactive System

We report the pressure effect on the intermolecular deuterium transfer tunneling rate in the acridine-doped fluorene crystal at 77, 150, and 200 K. Similar to the hydrogen transfer, the tunneling rate is exponentially enhanced by pressure. The pressure slope for this exponential enhancement, however...

Full description

Saved in:
Bibliographic Details
Published in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 1999-01, Vol.103 (3), p.344-348
Main Authors: Chan, I. Y, Hallock, A. J, Prass, B, Stehlik, D
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report the pressure effect on the intermolecular deuterium transfer tunneling rate in the acridine-doped fluorene crystal at 77, 150, and 200 K. Similar to the hydrogen transfer, the tunneling rate is exponentially enhanced by pressure. The pressure slope for this exponential enhancement, however, is found to be more temperature dependent for deuterium than for hydrogen tunneling. The ratio of the pressure coefficients for H and D stands at 2.6 at 77 K, gradually decreasing with increasing temperature until it becomes essentially unity at room temperature. An intuitive model based on the mass dependence of the tunneling distance is presented to rationalize these observations.
ISSN:1089-5639
1520-5215
DOI:10.1021/jp983560h