Table 3. Proportion of PF and DF constituting the fluorescence of 1a–3a ^a .

Complex	% PF	% DF
1a	99.2	0.81
2a	99.9	0.1
3a	97.1	2.9

^a % PF and % DF are estimated by integrating the emission intensity of degassed CH₂Cl₂ (5 × 10^–5 M) in the spectral region of λ = 350–700 nm over the time range: 0–500 ns and 800 ns to 999 μs, respectively (λ _exc = 355 nm).