Using polarized muons as ultrasensitive spin labels in free radical chemistry |
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Authors: | Iain McKenzie Emil Roduner |
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Institution: | 1. ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, UK 2. Institut für Physikalische Chemie, Universit?t Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
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Abstract: | In a chemical sense, the positive muon is a light proton. It is obtained at the ports of accelerators in beams with a spin
polarization of 100%, which makes it a highly sensitive probe of matter. The muonium atom is a light hydrogen isotope, nine
times lighter than H, with a muon as its nucleus. It reacts the same way as H, and by addition to double bonds it is implemented
in free radicals in which the muon serves as a fully polarized spin label. It is reviewed here how the muon can be used to
obtain information about muonium and radical reaction rates, radical structure, dynamics, and local environments. It can even
tell us what a fragrance molecule does in a shampoo. |
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Keywords: | Muon Free radical chemistry Spin labels Kinetics and dynamics |
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