“…The 13 C-NMR spectrum (Figure 6; for the assignment of the carbon atoms see Figure S3) shows signals which belong to the bz-PMO (133 ppm) [35], the APTES linker (10 ppm, C-12; 22 ppm C-1; 36 ppm C-10) [53,94,97] and also to the azobenzene molecules (169 ppm C-1 , 164 ppm C-5/-6 , 152 ppm C-2, 127 ppm C-7/-4, 122 ppm C-8/-9 and 114 ppm C-3). The appearance of all these signals confirms the successful covalent anchorage of the molecular switch.…”