We report for the first time on attempts to probe the spin cross over transition in [Fe(HB(Pz)3)2] molecular spin crossover complex using photoemission spectroscopy. We exploited temperature dependent X-ray photoemission, inverse photoemission and X-ray absorption spectroscopy to study this transition. Powder as well as thin films were employed for this study. The recorded spectra indicate a seemingly opposite trend in multiplet splitting and density of occupied states as the samples are driven (by increasing temperature) towards the transition from a low spin state to a high spin state. There are indications that the surface is far more temperature sensitive than the bulk. This evidence comes from comparing the magnetometric studies, which are the least surface sensitive to X-ray photoemission, inverse photoemission, and X-ray absorption spectroscopy, which are all surface sensitive.

Photoemission and x-ray absorption studies on [Fe(HB(Pz)3)2] molecular spin crossover complex

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