Table 2. Photochemical (1P and 2P) properties of 13–17, 19 and reference compound DEAC450 in aqueous acetonitrile.

Cpd	ε 455 nm (M–1 cm–1)	Q rel u /Φrefu a	Q rel u b	ε max u c (M–1 cm–1)	λ max 2PA (nm)	δ max u d (GM)
DEAC450	3.2 × 104	1	0.39	13 × 103	890	48
13	3.6 × 104	0.50	0.20	7.8 × 103	950	32
					700	37
14	4.1 × 104	0.21	0.08	4.0 × 103	970	30
					710	36
15	4.1 × 104	0.24	0.09	4.5 × 103	970	25
					700	35
16	3.0 × 104	<0.02	—	—	970	—
					730	—
17	4.6 × 104	0.23	0.09	4.2 × 103	940	13
					730	56
19	4.3 × 104	1.14	0.45	21 × 103	940	64
					730	442

^aRatio of uncaging quantum yield values derived from comparative 1P photolysis experiments in CD₃CN/D₂O (9/1, v/v) at 455 nm.

^bUncaging quantum yield values calculated using Φrefu = 0.39 for DEAC450-[Gly].

^cOne-photon uncaging sensitivity at λ^max.

^dTwo-photon uncaging sensitivity at λmax2PA estimated from comparative 1P photolysis experiments and 2PEF measurements.