Table 3.
Light-driven hydrogen production with different photosensitizers
| Complexes | Irradiation time, h | H2, mL | Attachment, % | H2 TON* | H2 TOF† |
| 1(bpy) | 60 | 1.0 | 16 | 2,100 | 114 |
| 1(bpyP) | 60 | 16.9 | 82 | 7,000 | 210 |
| 1(bpyCH2P) | 60 | 4.9 | 99 | 1,700 | 84 |
| 1(phenP) | 60 | 3.9 | 72 | 1,800 | 54 |
| 1(bpyC) | 60 | 4.1 | 89 | 1,600 | 84 |
| 4(bpy) | 60 | 2.3 | 11 | 7,100 | 361 |
| 4(bpyP) | 60 | 44.1 | 97 | 15,400 | 547 |
| 4(bpyCH2P) | 60 | 20.6 | 99 | 7,100 | 318 |
| 4(bpyC) | 60 | 11.7 | 87 | 4,600 | 185 |
| 5(phenP) | 60 | 7.3 | 70 | 3,500 | 171 |
| 6 | 60 | 1.6 | 36 | 1,500 | 57 |
| 4(bpyP) | 288 | 115.8 | 97 | 40,300 | — |
General conditions: for attachment, 20 mg of Pt-TiO2 and 2.5 mL of 50 µM solution of photosensitizer in CH3CN or CH2Cl2 were sonicated for 20 min; for H2 generation, 20 mg of dried Pt-TiO2 containing the attached photosensitizer was added to 5 mL of 0.5 M ascorbic acid in H2O at pH 4.0 and irradiated with 530 nm light.
*
Turnovers of H2 are given with respect to photosensitizer attached to Pt-TiO2.
†
The initial turnover frequency (TOF) of H2 is given per mole of photosensitizer per hour.