Synthesis of the SCO CP-dBCP nanocomposite particles in SV-15: 50 mg S85V15 154 and 6.7 mg (15 µmol) [FeL(MeOH)2] were dissolved in 20 mL THF in a 50 mL Schlenk flask. The solution was refluxed for 2 h. After cooling, 5.9 mg (37.5 µmol, 2.5 eq) 4,4'-bipyridine were added and the solution refluxed again for 1 h. After a short cool down to RT, 6.7 mg (15 µmol) [FeL(MeOH)2] and 5.9 mg (37.5 µmol, 2.5 eq) 4,4'bipyridine were added simultaneously and the solution was refluxed again for 1 h. The simultaneous addition of the reactants and the subsequent reflux of the solution were repeated up to three more times (samples 1a to 1d). Consecutively, the solvent was removed by cold distillation and the resulting dark brown polymeric solid was dried in vacuo. For sample 1e the amount of 4,4'-bipyridine for each cycle was reduced to 3.5 mg (22.5 µmol, 1.5 Eq). were dissolved in 20 mL THF in a 50 mL Schlenk flask. The solution was refluxed for 2 h. After cooling, 12.9 mg (82.5 µmol, 2.5 eq) 4,4'-bipyridine were added and the solution refluxed again for 1 h. After a short cool down to RT, 14.8 mg (33 µmol) [FeL(MeOH)2] and 12.9 mg (82.5 µmol, 2.5 eq) 4,4'bipyridine were added simultaneously and the solution was refluxed again for 1 h. The simultaneous addition of the reactants and the subsequent reflux of the solution were repeated three more times (samples 3a to 3d). Consecutively, the solvent was removed by cold distillation and the resulting dark brown polymeric solid was dried in vacuo. For sample 3e the amount of 4,4'-bipyridine for each cycle was reduced to 7.8 mg (50 µmol, 1.5 Eq). [FeL(MeOH)2] were dissolved in 20 mL THF in a 50 mL Schlenk flask. The solution was refluxed for 2 h. After cooling, 15.6 mg (100 µmol, 2.5 eq) 4,4'-bipyridine were added and the solution refluxed again for 1 h. After a short cool down to RT, 17.9 mg (40 µmol) [FeL(MeOH)2] and 15.6 mg (100 µmol, 2.5 eq) 4,4'bipyridine were added simultaneously and the solution was refluxed again for 1 h. The simultaneous addition of the reactants and the subsequent reflux of the solution were repeated three more times (samples 4a -4d). Consecutively, the solvent was removed by cold distillation and the resulting dark brown polymeric solid was dried in vacuo. For sample 4e the amount of 4,4'-bipyridine for each cycle was reduced to 9.4 mg (60 µmol, 1.5 Eq). [FeL(MeOH)2] were dissolved in 20 mL THF in a 50 mL Schlenk flask. The solution was refluxed for 2 h. After cooling, 25.4 mg (162.5 µmol, 2.5 eq) 4,4'-bipyridine were added and the solution refluxed again for 1 h. After a short cool down to RT, 29 mg (65 µmol) [FeL(MeOH)2] and 25.4 mg (162.5 µmol, 2.5 eq) 4,4'bipyridine were added simultaneously and the solution was refluxed again for 1 h. The simultaneous addition of the reactants and the subsequent reflux of the solution were repeated three more times (samples 5a -5d). Consecutively, the solvent was removed by cold distillation and the resulting dark brown polymeric solid was dried in vacuo. For sample 6e the amount of 4,4'-bipyridine for each cycle was reduced to 15.2 mg (97.5 µmol, 1.5 Eq).