Table 3.
Emission, singlet oxygen generation and energy upconversion data of the Pt(II) complexes recorded in deaerated DCM.
|
Compound |
λ em [a]/nm |
Φ P [b]/% |
Φ Δ [c]/% |
Φ UC [d]/% |
|---|---|---|---|---|
|
[Pt(L1)(acac)] |
623 |
21.9 |
38 |
5.9 |
|
[Pt(L2)(acac)] |
614 |
32.1 |
54 |
12.1 |
|
[Pt(L3)(acac)] |
608 |
37.1 |
39 |
14.1 |
|
[Pt(L4)(acac)] |
606 |
34.3 |
30 |
9.5 |
|
[Pt(L5)(acac)] |
610 |
27.1 |
58 |
8.5 |
[a] maximal phosphorescence emission wavelength; [b] phosphorescence quantum yields in N2, λ ex=440 nm; [c] Singlet oxygen quantum yield. [Ru(bpy)3]2+ (Φ Δ= 0.57 in DCM) as the standard, λ ex=440 nm. [d] TTA upconversion quantum yield in deoxygenated DCM. [Ru(dmb)3]2+ (Φ P=0.073 in deoxygenated acetonitrile; dmb=4,4′‐dimethyl‐2,2′‐bipyridine) as the reference, λ ex=473 nm.