Table 5. Fluorescence (ϕ_Fl) and Triplet (ϕ_T) Quantum Yield Values of Compounds 1, 1a–d, 2, and 2a–d in Dichloromethane at Room Temperature.

compound	ϕFl	ϕT
1	0.30	0.17
1a	0.04	0.30
1b	0.07	0.23
1c	0.07	0.16
1d	0.02	0.22
2	0.83	0.27
2a	0.03	0.56
2b	0.03	0.24
2c	0.02	0.26
2d	0.02	0.13