Bipolar phospholipids (bolalipids) represent an exciting class of amphiphilic molecules as they self-assemble in water to distinct structures of nanoscopic dimensions. Reported here are structural details of helical nanofibers, composed of achiral, symmetrical single-chain bolalipids with phosphocholine headgroups. These nanofibers are used as template for the fixation of gold nanoparticles (AuNPs) without prior functionalization. This realization of a metal array on bolalipid nanofibers is one of the rare examples of one-dimensional AuNP arrangements in solution. The loading and the heat of binding of AuNPs are determined applying transmission electron microscopy and isothermal titration calorimetry.

A basic aluminium chloride with high chlorine content (basicity 1.85) has been crystallized from a concentrated aqueous solution. Its crystal structure has been determined by X-ray structure analysis. The structure contains (Figure 1) with a Keggintype structure.[2] The latter structure is characterized by a particular resonance shift in its 27 Al-NMR spectrum, even in solutions of basic aluminium chlorides, [3] caused by the tetrahedrally coordinated, central aluminium, which is surrounded by 12 other octahedrally coordinated Al atoms. Various crystalline basic aluminium chlorides have been prepared from solutions by Walter-Levy and Breuil.[4] The crystalline phases were characterized by means of X-ray powder analysis and their thermal decomposition was investigated. The powder diagrams of some of these crystalline phases were unambiguously indexed and the lattice constants were determined. This is also the case for a cubic phase prepared at Dow Chemical Co.[5] However, as far as we are aware, results of crystal structure analyses have hitherto not been reported.In this paper, we report on a structure analysis of the most chlorine-rich of the basic aluminium chlorides described by Walter-Levy and Breuil.[4] [6] These authors obtained the salt as a crystalline precipitate that formed after several days following dilution and storage of concentrated basic aluminium chloride solutions. Suitable monocrystals for our structure analysis were obtained serendipitously, in the course of studies on the colloid structures of basic aluminium chlorides. Colloid solutions with an Al:Cl ratio in

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