Table 1.

Spectral Characteristics of dyes Cy-7, IR-780 and 6a–o. All optical properties of the dyes were measured in ethanol.

Dye	λmax (nm)	λemission (nm)	Stokes Shift (nm)	ε (L·mol−1·cm−1)	Φ (%)	Molecular Brightness (M−1·cm−1)
Cy-7	753	775	22	200,000	28	56,000
IR-780	779	799	20	274,000	8.0	20,800
6a	759	774	15	265,700	31	82,000
6b	765	780	15	261,000	34	88,700
6c	767	783	16	275,600	35	96,500
6d	782	802	20	249,500	10	25,000
6e	798	810	12	255,400	16	40,900
6f	760	781	21	263,900	39	102,300
6g	769	785	16	286,600	38	109,300
6h	770	786	16	282,900	42	119,200
6i	786	804	18	143,500	12	17,200
6j	797	810	13	231,800	17	39,400
6k	763	780	17	198,500	45	89,300
6l	772	787	15	123,400	47	58,000
6m	773	788	15	239,200	48	113,600
6n	789	805	16	249,900	11	27,100
6o	800	812	12	226,600	17	38,500