. Author manuscript; available in PMC: 2014 Oct 2.

Published in final edited form as: J Am Chem Soc. 2012 Jul 26;134(31):13103–13107. doi: 10.1021/ja305280w

Table 1.

Molar absorptivity of o-NB linkers A–E and degraded products at λ=365 nm, 405 nm and 436 nm and k_app at λ=370 nm.

o-NB group	ε₃₆₅ (M⁻¹cm⁻¹)	ε₄₀₅ (M⁻¹cm⁻¹)	ε₄₃₆ (M⁻¹cm⁻¹)	k_app/I₀ × 10⁴(cm²/mW·s)	τ, min
A degraded	3420 ± 165	729 ± 42	55.6 ± 3.8	0.26 ± 0.014	65 ± 3.5
A degraded	1925 ± 22	1269 ± 2	692 ± 2
B degraded	3500 ± 57	845 ± 16	77.8 ± 2.6	3.3 ± 0.022	5.0 ± 0.03
B degraded	2637 ± 32	1610 ± 31	685 ± 9
C degraded	1975 ± 299	86.2 ± 3.8	4.15 ± 0.21	0.42 ± 0.035	40 ± 3.3
C degraded	2201 ± 26	815.3 ± 18.6	515.7 ± 6.7
D degraded	2509 ± 93	161 ± 6	2.65 ± 2.08	8.3 ± 0.14	2.0 ± 0.03
D degraded	4061 ± 234	1608 ± 59	358 ± 16
E degraded	146.7 ± 3.6	4.70 ± 0.26	0.35 ± 0.21	2.6 ± 0.24	6.5 ± 0.6
E degraded	507.7 ± 6.8	166.7 ± 6.1	84.7 ± 4.2