A monolayer complex of Cu-2(OH)(3)C12H25SO4 directly precipitated from an aqueous SDS solution

A layered complex with the chemical composition of Cu-2(OH)(3)C12H25OSO3 wa s obtained through direct precipitation from a sodium dodecyl sulfate micel lar solution of Cu(II) at a nearly neutral condition (pH approximate to 6.8 ). From the XRD, C-13 CPMAS NMR, and the spin probe ESR observations, a mod ified botallackite structure with a monolayer alkyl phase was proposed for the complex. Magnetic susceptibility measurements for the complex showed th at there exist at least two exchange couplings: one is positive, and its ma gnitude is larger than that of the other, which is negative (J approximate to -8 K). Although the cupric ions of the complex are paramagnetic, most of those are ESR silent and only the ESR signals from defects could be observ ed even at 298 K. A spin clustering model has been employed to explain the magnetic properties of the complex.