Comparison of relaxation times for [Fe(R-bpy)3]Br2 as a function of solvent.
| Ground state recovery (ps) | ||||
|---|---|---|---|---|
| [Fe(bpy)3]Br2 | [Fe(dmb)3]Br2 | [Fe(5,5′-dmb)3]Br2 | [Fe(dtbbpy)3]Br2 | |
| Water | 675 ± 10 | 860 ± 10 | 635 ± 10 | N/Aa |
| Methanol | 985 ± 20 | 1210 ± 10 | 1010 ± 10 | 1035 ± 10 |
| Acetonitrile | 1015 ± 15 | 1285 ± 10 | 1040 ± 10 | 1055 ± 10 |
| Ethanol | 1015 ± 10 | 1210 ± 10 | 1045 ± 10 | 1125 ± 10 |
| 2-Propanol | 1045 ± 15 | 1225 ± 10 | 1065 ± 10 | 1235 ± 10 |
| 1-Butanol | 1060 ± 20 | 1285 ± 10 | 1130 ± 10 | 1300 ± 10 |
a
[Fe(dtbbpy)3]Br2 is soluble, but not stable in water.