Self-Assembly at the Air-Water Interface. In-Situ Preparation of Thin Films of Metal Ion Grid Architectures

Weissbuch, Isabelle; Baxter, Paul N. W.; Cohen, Sidney; Cohen, Hagai; Kjaer, Kristian; Howes, Paul B.; Als-Nielsen, Jens; Hanan, Garry S.; Schubert, Ulrich S.; Lehn, Jean-Marie; Leiserowitz, Leslie; Lahav, Meir

Abstract:

Oriented crystalline films, 11-20 Å thick, of metal ion complexes of the grid type [Co4L4]8+â8PF6 - and [Ag9L6]9+â9CF3SO3 -, based on various ligands L, were prepared in-situ at the air-aqueous solution interface by the interaction of the free ligand molecules spread onto aqueous solutions containing Co2+ or Ag+ ions. The structure of the complex architectures composed of a 2  2 Co2+ grid coordinated to four ligand molecules and a 3  3 Ag+ grid coordinated to six ligand molecules as well as their molecular organization in thin films were characterized by grazing incidence synchrotron X-ray diffraction (GIXD) and specular X-ray reflectivity (XR) measurements performed at the air-aqueous solution interface and by UV, X-ray photoelectron spectroscopy (XPS), and scanning force microscopy (SFM) after film transfer onto various solid supports. The results open perspectives toward an implementation of the air-water interface for the self-assembly and subsequent deposition of organized arrays of complex inorganic architectures onto solid support.

Year:

1998

Type of Publication:

Article

Journal:

Journal of the American Chemical Society

Volume:

120

Pages:

4850 – 4860