Table 1.

Spectroscopic properties of probes 1a and 1b.

Solvent	DCM	CHCl3	ACN	DMSO	DMF	EtOH	MeOH	Water
Probe 1a
λabs (nm)	541	512	478	477	476	488	482	438
λem (nm)	678	667	687	698	694	684	688	687
∆λ (nm)	137	155	209	221	218	196	206	249
ϕfl	0.61	0.29	0.33	0.68	0.40	0.24	0.38	0.01
ε (M−1·cm−1)	47,023	42,456	41,482	41,470	40,700	42,428	39,647	33,162
Probe 1b
λabs (nm)	561	530	487	489	490	501	492	446
λem (nm)	706	688	718	731	724	714	712	718
∆λ (nm)	145	158	231	242	234	213	220	272
ϕfl	0.72	0.47	0.24	0.61	0.48	0.38	0.31	0.005
ε (M−1·cm−1)	48,120	43,442	43,100	49,406	42,100	42,159	40,477	25,670