The blank is measured with the mITO plate and functionalized host. A CV is measured in THF (0.1M TBAPF6) or 0.2 M NaClO4 in H2O for aqueous experiments. Afterwards, the same sample is measured in the related ammonia containing mixture, e.g. 0.1 M NH4PF6 and 0.1 M TBAPF6 in 0.5 M NH3 in THF. After the CV in the ammonia solution, CA at a potential certain potential is measured for a certain time, and afterwards, a CV in both media (with ammonia and without) is measured again to compare the redox peak and catalysts loading before and after CA. For reabsorption, the sample is washed with acetone, dried (N2 stream), and dipped in the guest solution again for 1h. The complete process is repeated several times. The reabsorption ability of the guest to the surface-bound host was tested when washing the samples in between for 40 min with DMSO, followed by 5 min in MeOH. The related absorption of the MLCT between 420 and 560 nm (Figure ) of guest 1 was measured before every CV and after CA and the reabsorbing and washing steps. Recovery of the HG complex on the surface was achieved up to 3 times before a dropping of the absorption peak in the fourth reabsorption cycle (Figure , RG 4, black) was notable. The first and second reabsorption after CV and washing with DMSO are higher (RG1 violet, RG2 green) than the first guest absorption (red, G), which indicates that after DMSO washing, the cavity is empty and can absorb more guest. . With the resulting calibration curves a factor 157 per cm 2 was determined between the FTO and the mITO on FTO layer. This corresponds to a surface area of 392 cm 2 for a geometric area of 2.5 cm 2 and 235 cm 2 for a geometric area of 1.5 cm 2 . For the graphical illustration, the geometric area is shown, for the determination of the catalyst loading per cm 2 the calculated surface area was used. The catalyst loading was calculated via the Peak Analysis module in EC lab. The charge is determined by the integration of the Ru II/III redox peak and given in mC.