. 2015 Mar 18;21(19):7256–7263. doi: 10.1002/chem.201405635

Table 1.

Experimental nitrogen K-edge NEXAFS resonance and IP energies from Figure 2 along with the term value δ_C–N

Nitrogen [eV]	Non-ionic β-PABA	Anionic pH 11	Cationic pH 1	Non-ionic methanol
IP	403.60	402.90	405.20	403.47
1π^*	400.58	401.22	–	400.68
3π^*	402.30	402.14	–	401.98
1σ^*_N–H	405.11	404.15	405.20	403.66
2σ^*_C–N	409.09	408.30	408.36	408.66
Δπ^*	1.72	0.92	–	1.30
δ_C–N (σ^*_C–N−IP)	5.49	5.40	3.16	5.19