. Author manuscript; available in PMC: 2017 Mar 1.

Published in final edited form as: J Fluoresc. 2011 Jul 12;21(6):2173–2184. doi: 10.1007/s10895-011-0919-y

Table 3.

Absorption and emission maxima and stokes shift of aurones 1–4 in various solvents

		Amide 1			Amine 2			Amine 3			Amine 4
Solvent	E_T30	A_max nm	Em_max nm	Δν cm⁻¹	A_max nm	Em_max nm	Δν cm⁻¹	A_max nm	Em_max nm	Δν cm⁻¹	A_max nm	Em_max nm	Δν cm⁻¹
Dioxane	36	399	446	2640	426	489	3020	472	540	2670	486	546	2260
Ethyl Acetate	38.1	399	446	2640	426	501	3510	472	552	3070	483	552	2590
Acetone	42.2	398	460	3390	429	522	4150	481	575	3400	487	574	3110
DMSO	45.0	401	481	4150	452	548	3880	498	591	3160	510	595	2800
Isopropanol	48.6	395	468	3950	446	542	3970	497	579	2850	513	576	2130
Ethanol	51.9	395	482	4570	441	540	4160	501	580	2720	515	584	2290
Methanol	55.5	395	496	5160	442	542	4120	503	582	2740	518	588	2260
Water	63.1	407	521	5380	430	560	5400	– ^a	–	–	545	612	2010

Amine 3 was insoluble in water