| Abstract
| - 5,11,17,23-Tetra-tert-butyl-25,27-di{[(2‘-amino-4‘-methylthio)butyryl]aminoethoxy}-26,28-dihydroxycalix[4]arene (L) and its mono- and binuclear palladium(II) complexes (PdLCl2 and Pd2LCl4) were synthesized.Their monolayers at the air−water interface were investigated by film balance measurements (compression/expansion experiments, area relaxation experiments, viscosity measurements) and Brewster anglemicroscopy. The monolayer of L is inclined to form domains and multilayers, while the monolayer of PdLCl2demonstrates good reversibility and high collapse pressure. The monolayer formed by Pd2LCl4 exhibitsextraordinary cohesiveness, stability, and robustness. Its extraordinary properties are likely due to theintermolecular cross-linkage of precursor complex of Pd2LCl4 via strong chloride bridges. This providesan example of improving mechanical properties of film through intermolecular metal complexing.
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