. Author manuscript; available in PMC: 2008 Jul 8.

Published in final edited form as: Angew Chem Int Ed Engl. 2008;47(13):2394–2397. doi: 10.1002/anie.200704847

Table 1.

Photophysical parameters of phosphine probes.

	ε^[^a^] (M⁻¹cm⁻¹)	λ_abs^[^a^] (nm)	λ_em^[^a,^b^] (nm)	Φ_F^[^a,^b ^c^]
1	6,600 ± 200	505	515	0.00372 ± 0.00005
1-oxide	18,800 ± 300	505	520	0.00521 ± 0.00004
9	44,000 ± 1,000	501	520	0.64 ± 0.02

Measured in phosphate-buffered saline (PBS), pH 7.0.

λ_ex = 470 nm.

Relative quantum yields of fluorescence (Φ_F) measured using fluorescein as the standard.