Table 3.

Emission solvatochromism of compounds 11.

Compounds	λem [nm] a
	n-Heptane ET(30) = 30.9 a	Toluene ET(30) = 33.9 a	1,4-Dioxane ET(30) = 36.0 a	THF ET(30) = 37.4 a	CHCl3 ET(30) = 39.1 a	DCM ET(30) = 40.7 a
11a	456	487	521	534	573	584
11b	422	431	452	484	495	512

^a Reichardt polarity parameter (kcal mol⁻¹).