Table 4.

Photophysical properties of functionalized merocyanines.

dye name	% yield (from enol ether)	solvent	QYa	εb	QY × ε	λmax (nm) absorption	λmax (nm) emission
mero60	21	DMSO	0.37	126000	46620	593	620
		MeOH	0.02	133000	2660	591	614
		BuOH	0.16	132000	21120	593	616
		H2O	<0.01	106000	11	595	608
mero61	26	DMSO	0.37	100000	37035	570	595
		MeOH	0.07	167000	11690	565	588
		BuOH	0.17	146000	24820	570	592
		H2O	0.03	131000	3930	565	586
mero62	21	DMSO	0.20	135000	27000	597	615
		MeOH	0.09	140000	12600	590	608
		BuOH	0.18	139000	25020	594	614
		H2O	0.10	36000	3600	585	608
mero87	33	DMSO	0.34	140000	47600	592	620
		MeOH	0.06	107000	6420	588	620
		BuOH	0.21	111000	23310	591	622
		H2O	0.02	81000	1620	592	616
mero60-BME	-	DMSO	0.66	124000	81870	595	618
mero61-BME	-	DMSO	0.55	116000	63800	570	594
mero62-BME	-	DMSO	0.41	142000	58220	596	614
mero87-BME	-	DMSO	0.27	105000	28350	590	620
I-SOc	-	BuOH	0.54	134000	72000	587	618
		OcOH	0.98	125000	123000	587	617
	-	MeOH	0.08	143000	11440	586	615

^aQuantum yield of fluorescence, error ± 10%.

^bMolar extinction coefficient, error ± 10%.

^cValues for I-SO as reported in ref.9 are included for comparison (see Discussion and Conclusions).