Table 1 Experimental data determined by UV-Vis absorption spectroscopy and by global analysis of the transient absorption spectra.

Compound	UV-Vis spectroscopy			Transient absorption spectroscopy
Compound	S₀ → S_n (λ_main) [nm]	ΔE (S₀ → S_n) [cm⁻¹]	S₀ → S_2/3 (λ_weak) [nm]	τ₁ [ps]	τ₂ [ps]	τ₃ (Ar) [μs]	τ₃ (O₂) [ns]
*Tr[4]**	268	1987	368	1.4	117.2	6.0	87.1
*Tr[6]**	310	1989	443	1.8	429.9	7.9	45.8
*Tr[8]**	347	1957	495	2.2	487.1	4.3	59.4
*Tr[10]**	376	1894	508	2.3	751.8	7.7	54.3
Glu[4]	242	1968	347	n.d.	n.d.	n.d.	n.d.
Glu[6]	292	1985	430	8.8	307.3	n.d.	n.d.
Glu[8]	334	1907	487	4.4	391.8	n.d.	n.d.
Glu[10]	367	1822	523	3.2	469.6	n.d.	n.d.
Glu[12]	393	1803	564	2.7	1106.4	n.d.	n.d.

Data determined for Tr*[n] with n = 4–10 (in hexane) and Glu[n] with n = 4–12 (in DCM), as well as the time constants τ₁ (S_n → S₁), τ₂ (S₁ → T₁), and τ₃ (T₁ → S₀) obtained by global analysis of the transient absorption data using a convolution of the instrument response function and three exponential functions (n.d. not determined). Source data are provided in the Source Data file.

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