With both cages producing feasibly energetically accessible 30 calculated relative energies across the different isomer conformations, the photoisomerization behaviour was explored using UV-Vis spectroscopy (Fig. ). In each case, the cages were dissolved in dry dichloroethane (DCE) with concentrations of ca. 30 µM with respect to the azobenzene unit for both cages. Each system was irradiated with light from the initial EEE solution (dark state) to a Z-rich photostationary state (PSS). ACC-1 was irradiated with both 340 nm and 365 nm light, achieving a conversion of 77% and 75% to ZZZ-ACC-1 respectively. Conversion back to the EEE-rich solution was also successful using 405 nm and 450 nm light, which produced 94% of EEE-ACC-1. Irradiation of ACC-2 with 365 nm light gave a PSS of only 54% ZZZ-ACC-2, whilst irradiation with 450 nm light produced a 97% EEE-ACC-2 solution. The previously reported reduced variant of ACC-2 also shows higher conversion to ZZZ with a reported value of 87%, showing how the varied flexibility and electronic effects between imine and amine bonds plays an important role in the photoisomerization of cage molecules. ACC-1 exhibited the longer thermal half-life of the two cages at 110 ± 10 hours in dry DCE at 25 °C as measured by UV-Vis (Fig. -10), compared to 6.0 ± 0.1 hours for ACC-2 (Fig. ). (30 µM). The percentage of the cis-isomer present at the PSS of each irradiation wavelengths is shown, and the "pure" fully cis spectrum overlaid (dashed line).