Table 1.
Photophysical properties of the dinuclear complexes and coordination polymers under ambient conditions.
| Formula | τobs/ms | Φff a/ % | Φππ* b/ % | ηsens / % | ∆E/cm−1 | A/s−1 | |
|---|---|---|---|---|---|---|---|
| Tb-dinuclear | [Tb2(tmh)6 (4,4’-bpy)] | 0.15 ± 0.01 | 20 ± 5 | 14 ± 2 | 72 | 1.6 × 103 | 1.1 × 107 |
| Dy-dinuclear | [Dy2(tmh)6 (4,4’-bpy)] | 0.025 ± 0.001 | 6 ± 5 | 6 ± 2 | 99 | 3.5 × 103 | 3.2 × 109 |
| Tb-polymer | [Tb(tmh)3 (4,4’-bpy)]n | 0.60 ± 0.02 | 64 ± 5 | 64 ± 2 | 99 | — | — |
| Dy-polymer | [Dy(tmh)3 (4,4’-bpy)]n | 0.025 ± 0.001 | 7 ± 5 | 7 ± 2 | 99 | 2.9 × 103 | 2.5 × 108 |
aMeasured using an integrating sphere (Tb(III) complexes: λex = 484 nm (5D4 ← 7F6); Dy(III) complexes: λex = 455 nm (4I15/2 ← 6H15/2)). bMeasured using an integrating sphere (λex = 360 nm). ηsens = Φππ* × Φff−1 × 100. Arrhenius equation: ln (1/τobs – 1/τ200K) = ln (kET) = ln (A) – (∆E/kBT), where kB is the Boltzmann constant, ∆E is the activation energy, and A is the frequency factor. Ambient temperature: 23 °C.