Investigation of Complex Formation of Cobalt(II) with Molecular Langmuir Layers of Octadecane-2,4-dione

In this Article, we report the process of keto–enol tautomerism and deprotonation of amphiphilic β-diketone (octadecane-2,4-dione) in Langmuir layers. The complex formation of the Co2+ ions with the monolayer octadecane-2,4-dione depending on the pH and the concentration of the Co2+ in the subphase was investigated. Compression of monolayers of the octadecane-2,4-dione and its complex with Co2+ using the Langmuir–Blodgett (LB) method gives rise to monolayer and multilayer thin films with different packing densities. The morphology and optical properties of the LB films were investigated using atomic force microscopy and UV–vis absorption spectroscopy.