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Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

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3.7 References 76<br />

4. Experimental methods<br />

In this section we consider experimental techniques for determining rate coefficients.<br />

We’ll get to faster reactions as we go down the list.<br />

Special techniques used in quantum state-resolved reaction dynamics, photodissociation,<br />

or transition state spectroscopy (molecular beams, state specific detection, photofragment<br />

translational spectroscopy, photofragment imaging, other pump-probe techniques,<br />

fluorescence up-conversion, fs-CARS, fs-DFWM) will be considered later (in advanced<br />

courses), but we’ll briefly touch photochemistry and “femtochemistry”.<br />

4.1 End product analysis<br />

• firststepforsettingupreactionmechanisms,<br />

• all convenient analytical techniques (HPLC, GC, GC-MS, MS, UV, FTIR, . . . ),<br />

• Problem: No “direct” kinetic information because of lack of time resolution.<br />

I<br />

Figure 4.1: FTIR spectrometer for kinetic studies of photolysis-induced reactions.

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