Seeking papers on Energy Level Diagrams for LiNO2 and O2

[Adrian Tudini]

TL;DR

Seeking papers on energy levels for LiNO2 (lithium nitrite) and O2 (di-oxygen)

Hi

For a personal project, I am seeking papers or information on the energy level diagrams (where the y-axis is energy (eV)) for Lithium Nitrite (LiNO2) and di-oxygen (O2).

I tried the internet and science direct (www.sciencedirect.com) but to no avail.

Any help in this matter would be greatly appreciated.

Thanks.