Photophysical data for M1, M1_CB[7] and M1_CB[8] under ambient.

Compoundsb	Solvent	Ex [nm]	Em [nm]	τ avg. a [ns]	ϕ FL (%)	k r c [nm]	knrd [ns]	k r/knr
M1 solution	H2O	375	537	0.54	0.52	9.6 × 10−3	1.8	5.3 × 10−3
M1_CB[7] solution	H2O	375	547	0.89	3.03	3.4 × 10−2	1.1	3.1 × 10−2
M1_CB[8] solution	H2O	375	590	16.80	24.40	1.5 × 10−2	4.4 × 10−2	3.4 × 10−1
M1 crystal	—	375	533	3.78	0.02	5.3 × 10−5	2.6 × 10−1	2.1 × 10−4
M1_CB[7] crystal	—	375	520	4.60	1.27	2.8 × 10−3	2.1 × 10−1	1.3 × 10−2
M1_CB[8] crystal	—	375	620	17.04	22.32	1.3 × 10−2	4.6 × 10−2	2.8 × 10−1

^aLifetimes were measured using an EPL picosecond pulsed diode laser (375 nm) as a light source.

^bThe absolute photoluminescent quantum yield of M1, M1_CB[7], and M1_CB[8] under ambient (air) were measured using an integrating sphere.

^cThe radiative decay rate constant of fluorescence k_r = ϕ_FL/τ.

^dThe nonradiative decay rate constant of phosphorescence k_nr = τ_avg.⁻¹ – k_r.