Table 4.
Cage-escape yields (ϕCE) for the indicated photosensitizer/aryl diazonium combinations recorded in argon-purged acetonitrile.
| ϕCE | [Ru(bpy)3]2+a | [Os(bpy)3]2+ | [Ir(ppy)3] | [Ir((dFCF3)ppy)2(dtb)]+ | [Ir(ppy)2(dtb)]+ |
|---|---|---|---|---|---|
| MeO | 38%b | 18% | 61% | 44% | 43% |
| Br | N.D | 61% | 100% | 100% | 100% |
| COOEt | 74% | 89% | N.D | 89% | 100% |
| NO2 | 98% | 97% | N.D | 100% | 100% |
a
a cage escape yield of 45% was determined for [Ru(bpy)3]2+ using 4-ethylbenzene diazonium tetrafluoroborate.
b
a value of 39% was determined in acetonitrile containing 0.1M TBABF4.
An error of 10% is assumed on each value. N.D = Not determined