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Chemistry. 2000 Feb 18;6(4):725-34. doi: 10.1002/(sici)1521-3765(20000218)6:4<725::aid-chem725>3.0.co;2-e.

Oriented crystalline monolayers and bilayers of 2 x 2 silver(I) grid architectures at the air-solution interface: their assembly and crystal structure elucidation.

Chemistry (Weinheim an der Bergstrasse, Germany)

Weissbuch, Baxter, Kuzmenko, Cohen, Cohen, Kjaer, Howes, Als-Nielsen, Lehn, Leiserowitz, Lahav

Affiliations

  1. Department of Materials and Interfaces, The Weizmann Institute of Science, Rehovot, Israel. [email protected]

PMID: 10807183 DOI: 10.1002/(sici)1521-3765(20000218)6:4<725::aid-chem725>3.0.co;2-e

Abstract

Oriented crystalline monolayers, approximately 14 A thick, of a 2 x 2 Ag+ grid complex, self-assembled at the air-solution interface starting from an water-insoluble ligand 3,6-bis[2-(6-phenylpyridine)]pyridazine spread on silver-ion-containing solutions, were examined by grazing-incidence X-ray diffraction and specular X-ray reflectivity using synchrotron radiation. The monolayer structure was refined, including a determination of the positions of the counter-ions, with the SHELX-97 computer program. The monolayers were transferred from the interface onto various solid supports and visualized by scanning force microscopy, and characterized by X-ray photoelectron spectroscopy in terms of molecular structure. On surface compression, the initial self-assembled monolayer undergoes a transition to a crystalline bilayer in which the two layers, almost retaining the original arrangement, are in registry. Such a phase transition is of relevance to the understanding of crystal nucleation.

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