Table 1.

Spectral properties of the investigated compounds in different solvents (dielectric constant, ε, and refractive index, n) absorption maximum (λ_abs), emission maximum (λ_em), Stokes shift ($\mathsf{\Delta }\tilde{\nu }$). Bold values refer to the main absorption or emission maxima.

		DMA-QP		DMA-QF			DMA-QT
Solvent	f (ε, n) a	λabs/nm	λem/nm	$\mathit{\Delta }\tilde{\mathit{\nu }}/{\mathbf{cm}}^{-1}$	λabs/nm	λem/nm	$\mathit{\Delta }\tilde{\mathit{\nu }}/{\mathbf{cm}}^{-1}$	λabs/nm	λem/nm	$\mathit{\Delta }\tilde{\mathit{\nu }}/{\mathbf{cm}}^{-1}$
Tol	0.02423	368	430	3920	428	484	2700	438, 462 sh	488, 523	1200
Tol/An (50/50 v/v)	0.14278	367	437	4365	433	504	3250	440, 462 sh	496, 528	1480
An	0.22353	371	448	4630	435	523	3570	442, 462 sh	504, 533	1800
EtOAc	0.36011	363	443	4975	431	527	4230	430, 455 sh	496 sh, 521	1820
An/DCE (50/50 v/v)	0.39998	369	452	4980	436	540	4420	440, 462 sh	504, 533	1800
DCE	0.4968	368	458	5340	437	545	4540	437, 462 sh	513 sh, 532	2850
DCE/DMF (50/50 v/v)	0.58324	368	468	5810	437	568	5280	438, 462 sh	536	2990
EtOH	0.6668	367	480	6415	452	612	5780	429, 455 sh	522	2820
AcCN	0.66697	364	451	5300	431	581	5990	432,455 sh	537	3360
DMF	0.71215	368	474	6080	437	579	5610	440, 462 sh	548	3400

^a $f\left(\epsilon ,n\right)=\left(\frac{\epsilon -1}{\epsilon +2}-\frac{n^2-1}{n^2+2}\right)$; ^sh = shoulder.