Infrared photodissociation of hydrogen-bonded complexes trapped in inert matrices

L. Schriver; A. Schriver; S. Racine; J. P. Perchard

doi:10.1117/12.23099

1 November 1990 Infrared photodissociation of hydrogen-bonded complexes trapped in inert matrices

L. Schriver, A. Schriver, S. Racine, J. P. Perchard

Proceedings Volume 1341, Infrared Technology XVI; (1990) https://doi.org/10.1117/12.23099
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

Vibrational dissociation of hydrogen bonded complexes trapped in inert matrices at 10 K can be induced either upon selective infrared laser excitation or after broad band JR irradiation. Because of the rigidity of the host crystal the photodissociation corresponds to an internal reorganization of the complex, the new non hydrogen bonded form being metatastable and susceptible of a back transformation upon temperature increase or by tunneling. Kinetic measurements of the interconversion between the H-bonded (C) and non H-bonded (U) forms as a function of the temperature and irradiation domain allow conclusions to be drawn about the vibrational modes efficient for inducing the photoprocess and the energy barriers involved in the C &rlarr2; U interconversion. Two kinds of examples will be reported, one relating to hetero dimers of the type B:HJ, where B is a weak or medium strength base, the other to ammonia polymers. Comparison with recent predissociation studies in the gas and in the liquid phases evidences great similarities, in particular mode selectivity, whatever the physical state.

Citation Download Citation

L. Schriver, A. Schriver, S. Racine, and J. P. Perchard "Infrared photodissociation of hydrogen-bonded complexes trapped in inert matrices", Proc. SPIE 1341, Infrared Technology XVI, (1 November 1990); https://doi.org/10.1117/12.23099

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