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. Author manuscript; available in PMC: 2019 May 23.
Published in final edited form as: Angew Chem Int Ed Engl. 2018 Dec 20;58(5):1334–1339. doi: 10.1002/anie.201810522

Figure 2.

Figure 2

X-band ESR measurement (black line) and ESR spectrum fit (dashed red line) after 5 min UV-light irradiation at 77 K of a single 4.0±0.2 µl bead of a frozen solution containing PA:GW55 1:9 (v/v) (A); [1-13C]PA:GW55 1:9 (v/v) (B); [2-13C]PA:GW55 1:9 (v/v) (C); TriPA:GW55 1:9 (v/v) (D). GW55 is an abbreviation for the solvent composition glycerol:water 50:50 (v/v). In the insert the structural formula of the radical precursor is shown.