Abstract
Abstract We report experimental results of the ground state proton tunneling rate constant k in the absence of radiation to be from 0.03 to 0.35 s −1 at temperatures from 4.2 to 77 K for tetra-4-tertiary butylphthalocyanine tautomers embedded in hexadecane matrices. While a detailed microscopic description of the exact transfer mechanism is not possible from the data obtained so far, we present a model based on a new type of potential barrier and use the semiclassical WKB approximation to calculate transmission data compatible with experiment.
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