Lifetimes of the excited states of KOSiPh₃, 1-Ln^Ph (Ln = Ce, Pr, Gd), 3-Pr^MeCN and 4-Pr^Ph in toluene frozen solutions (77 K).

Sample	λ ex/nm	λ em/nm	τ 1/μs	τ av a/μs
KLPh	276	431	—	1.8 ± 0.1
1-Gd	280	427	—	0.9 ± 0.2
1-Ce	276	410	1.5 ± 0.2	—
1-Pr	277	450	—	5.80 ± 0.2
3-PrMeCN	307	611	3.4 ± 0.2	—
4-PrPh	345	599	—	3.45 ± 0.17

^aBiexponential decay, amplitude average lifetime: τ_av = Σa_iτ_i.