On the observation of photo-excitation effects in molecules using muon spin spectroscopy
Source abstract
Abstract
Wang et al. reported changes in the muonium (Mu) addition rate at different sites in 6,13-bis(tri(isopropyl)-silylethynyl)-pentacene (TIPS-Pn) in CH2Cl2 when it was photo-excited compared with the ground electronic state1. To make this claim, one must demonstrate that (1) there is a change in the overall reaction rate of Mu with TIPS-Pn, and (2) there is a change in the relative yield of each muoniated radical formed by Mu addition to TIPS-Pn. Our independent analysis of the transverse-field muon spin rotation (TF-μSR) and avoided level crossing μSR (ALC-μSR) spectra in ref. 1 indicates that there is no statistically significant effect of photo-excitation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Muon and positron interactions and applications · Advanced NMR Techniques and Applications · Atomic and Subatomic Physics Research
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References (5)
Show source-provided references
1. Wang, K. et al. Temporal mapping of photochemical reactions and molecular excited states with carbon specificity. Nat. Mater. 16, 467–473 (2017).10.1038/nmat4816 ↗
2. Walker, D. C. Muon and Muonium Chemistry (Cambridge Univ. Press, 1983).10.1017/CBO9780511721717 ↗
3. Roduner, E. The Positive Muon as a Probe in Free Radical Chemistry: Potential and Limitations of the μSR Techniques Vol. 49 (Springer, 1988).10.1007/978-3-642-51720-4 ↗
4. Holzschuh, E., Kündig, W. & Patterson, B. D. Direct measurement of the muonium hyperfine frequencies in quartz. Helv. Phys. Acta 54, 552–560 (1981).
5. Lord, J. S. et al. Design and commissioning of a high magnetic field muon spin relaxation spectrometer at the ISIS pulsed neutron and muon source. Rev. Sci. Instrum. 82, 073904 (2011).10.1063/1.3608114 ↗