. 2022 Nov 18;7(48):44170–44179. doi: 10.1021/acsomega.2c05637

Table 3. Spectral Features for the Oxygen K-Edge in the TEY Mode.

peak	photon energy (eV)	NEXAFS spectral feature
A₁	531.88	π* resonances from oxygen double bonded to carbon (C=O)^26,27
A₂	535.10	σ* (O–H)^27,28
A₃	537.43	σ* related to C–OH and C–O–C^26,27
A₄	539.34	σ* related to C=O²⁷