Table 1.

Typical photophysical properties of R in organic solvents and in micelles.

	λmax abs [a] (nm)	λmax em [b] (nm)	η[c]	Lifetime (ns)[d]			δ (GM)	λmax 2PA [g] (nm)	ηδ at 820 nm (GM)
				τ1	τ2	<τ>
In toluene	524	628	0.44			4.08	930[e]	820	409
In THF	524	658	0.27			3.77	520[e]	830	143
In DCM	523	670	0.09			2.06	370[e]	830	30
In DMF	527	674	0.01			---	---	---[h]	---[h]
In micelle 1	534	672	0.07	1.70 (0.54)	4.61 (0.46)	3.70	310[f]		22
In micelle 2	534	671	0.08	1.79 (0.63)	4.36 (0.37)	3.31	400[f]		32

^[a] absorbance maximum;

^[b] emission maximum;

^[c] quantum yield;

^[d] the numbers in the parenthesis of τ₁ and τ₂ are their corresponding A₁ and A₂;

^[e] the maximum of the 2PA cross-sections;

^[f] the 2PA cross-sections at 820 nm;

^[g] the wavelength of the maximum 2PA cross-sections;

^[h] too weak to measure.