Table 7.

Physico-chemical properties and biological data obtained for compounds 2a–d [103].

	2a	2b	2c	2d
λabs a	521 nm	507 nm	538 nm	507 nm
λem a	563 nm	540 nm	568 nm	542 nm
Φfluo b	0.007	0.002	0.002	0.002

^a In DCM. ^b In DCM with fluorescein (0.1 M NaOH, 0.90) as standard.