Abstract
After a short description of the various methods of producing temperature jumps in aqueous solutions attention is focussed on the laser temperature jump techniques which have been built so far. It is shown that the iodine laser, which is described in this paper, having an emission wavelength of 1.315 μm, an energy output of 1–20 Joule, and characteristic pulse lengths of 2.4 μs or 3 ns is the most versatile arrangement for the direct heating of water. Its application in a T-jump experiment has already been realized and is described in this publication. The system was tested by investigating the dissociation-association reaction of water using a conductance bridge and the protonation-deprotonation reaction of the pH indicator dyes tropoeolin O and Phenolphthalein using a spectral photometric detection system. Due to the advantageous wavelength of the laser shock waves and different relaxation amplitudes inside the measuring cell could be completely avoided. Measurements at the same very short heating time over the complete conductivity range of water are possible.
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Holzwarth, J.F. (1979). Laser Temperature Jump. In: Gettins, W.J., Wyn-Jones, E. (eds) Techniques and Applications of Fast Reactions in Solution. NATO Advanced Study Institutes Series, vol 50. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9490-4_7
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DOI: https://doi.org/10.1007/978-94-009-9490-4_7
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