Fourier transform-infrared (FT-IR) Spectroscopic Study of Proton Transport in H-bonded solids

Paul J. Wooldridge; J. Paul Devlin

doi:10.1117/12.970867

20 December 1985 Fourier transform-infrared (FT-IR) Spectroscopic Study of Proton Transport in H-bonded solids

Paul J. Wooldridge, J. Paul Devlin

Proceedings Volume 0553, Fourier and Computerized Infrared Spectroscopy; (1985) https://doi.org/10.1117/12.970867
Event: 1985 International Conference on Fourier and Computerized Infrared Spectroscopy, 1985, Ottawa, Canada

Abstract

The equilibrium proton concentration in pure cubic ice is sufficiently low at T<125K that the proton hopping step required for the conversion of isolated D20 molecules to neighbor coupled HOD molecules ((HOD)2) is extremely slow. Thus no isotopic exchange is observed. However, it is shown in the present study that cubic ice is subject to photoionization by the uv radiation of a mercury resonance lamp. At low temperatures, the mobile protons that are formed are immediately immobilized in shallow traps after producing only a very limited conversion of D20 to (HOD)2. Above 110K these shallowly trapped protons are released at a significant rate, establishing a psuedoequilibrium concentration of mobile protons that sustains the reaction D20 + H2O "f; (HOD)2 allowing equilibrium to be established. The kinetics for this proton transfer reaction has been followed by monitoring the concentration of D20, (HOD)2 and isolated HOD using FT-IR methods.

Citation Download Citation

Paul J. Wooldridge and J. Paul Devlin "Fourier transform-infrared (FT-IR) Spectroscopic Study of Proton Transport in H-bonded solids", Proc. SPIE 0553, Fourier and Computerized Infrared Spectroscopy, (20 December 1985); https://doi.org/10.1117/12.970867

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