Spin-crossover molecules (SCMs) are coordination compounds based on transition metals which exhibit bistable electronic configurations (high-spin and low-spin states) that can be tuned through external stimuli, such as temperature, pressure or light. This property makes them highly attractive for applications in molecular electronics, spintronics, and energy conversion. In this work, the empirical values that describe the thermodynamical as well as photochemical interactions of a set of different tridentate-ligand SCMs deposited as thin films on highly oriented pyrolitic graphite (HOPG) (and also in the bulk phase) were investigated. For this, two different characterization methods, namely x-ray absorption spectroscopy (XAS) and differential reflectance spectroscopy (DRS) were used. The parameters obtained from the results can be used to describe the different arrangements of SCM in both their high-spin and low-spin state configurations.
