Abstract
Metal octadecylphosphonate Langmuir–Blodgett (LB) films of a series of divalent and trivalent metals have been prepared and characterized. The films are each shown to be LB analogs of known solid-state metal organophosphonates possessing a two-dimensional ionic–covalent metal phosphonate network. The metal phosphonate lattice crystallizes during the LB deposition process. LB films of octadecylphosphonic acid with Mn 2+, Mg 2+, Co 2+ and Cd 2+ form with the stoichiometry M II(O 3PC 18H 37)H 2O and have metal binding consistent with the analogous M II(O 3PR)H 2O layered solids. The Ca 2+ and Ba 2+ films form structures with stoichiometry M II(HO 3PC 18H 37) 2, and octadecylphosphonate LB films of La 3+, Sm 3+ and Gd 3+ form with stoichiometry M III(HO 3PC 18H 37)(O 3PC 18H 37) and have structures consistent with the analogous M III(HO 3PR)(O 3PR) layered solids.
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