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arXiv · 2208.05231

Spin crossover self-assembled monolayer of a Co(II) terpyridine derivative functionalized with carboxylic acid groups

Victor Garcia-Lopez·Niccolo Giaconi·Lorenzo Poggini·Amelie Juhin·Brunetto Cortigiani·Javier Herrero-Martin·Matteo Mannini·Miguel Clemente-Leon·Eugenio Coronado
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Abstract

The deposition of a monolayer by direct self-assembly from solution of an active spin-crossover (SCO) complex via chemisorption has been achieved starting from the perchlorate salt of Co(II) bis(4-(4-carboxyphenyl)-2,2:6,2-terpyridine). MALDI-TOF MS, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) confirm the presence of an intact monolayer of SCO molecules grafted through carboxylate groups to the Ag surface. Three different spectroscopic techniques (Raman, XPS and X-ray Absorption spectroscopy, XAS) evidence a thermal spin transition of such monolayer of molecules. To our knowledge, this is the first example of an active SCO assembly in direct contact with a surface obtained by wet chemistry.

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Victor Garcia-Lopez, Niccolo Giaconi, Lorenzo Poggini, Amelie Juhin, Brunetto Cortigiani, Javier Herrero-Martin, Matteo Mannini, Miguel Clemente-Leon, Eugenio Coronado. 2022-08-10. Spin crossover self-assembled monolayer of a Co(II) terpyridine derivative functionalized with carboxylic acid groups. https://arxiv.org/abs/2208.05231

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