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.
@article{arxiv.2208.05231,
title = {Spin crossover self-assembled monolayer of a Co(II) terpyridine derivative functionalized with carboxylic acid groups},
author = {Victor Garcia-Lopez and Niccolo Giaconi and Lorenzo Poggini and Amelie Juhin and Brunetto Cortigiani and Javier Herrero-Martin and Matteo Mannini and Miguel Clemente-Leon and Eugenio Coronado},
journal= {arXiv preprint arXiv:2208.05231},
year = {2022}
}
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19 pages of main text with 7 figures, 23 pages of supporting information, 42 pages in total