I am dealing with in-situ battery measurements.
While I am changing the voltage, the white line of TM is changing its position and intensity. 
The change in intensity can be related to the order as pointed out here:
https://pubs.acs.org/doi/10.1021/acsami.0c13161

But what about energy shifts when there is no change in the oxidation state? Any reference where to dig?
Best regards.