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. 2024 Feb 13;146(8):5634–5642. doi: 10.1021/jacs.3c14430

Figure 3.

Figure 3

Characterization and photochemical isomerization of motor 1. (a) 19F NMR spectra (376 MHz, 20 °C, CD2Cl2) of (ZSZS)-1, (ESZS)-1, and (ESES)-1. The arrows indicate through-space 1H–19F coupling interactions. (b) X-ray structure of (ESZS)-1. Ellipsoids are set at the 50% probability. (c) UV/vis absorption spectra (left) and difference spectra (right) of (ESES)-1 in CH2Cl2 (4 × 10–5 M, −90 °C) upon irradiation with 455 nm light. The pure isomer (ESES)-1 is shown in orange and the obtained PSS containing (ESES)-1 and (ESZM)-1 in blue. An isosbestic point is maintained at 378 nm.