Solution‐phase synthesis of single‐crystal ZnO disks and rings was achieved in high yield at low temperature (70–90 °C) by using an anionic surfactant as a template. The reaction can be controlled by means of the growth temperature and the molar ratio of reagents to favor formation of disks or rings. A growth mechanism is proposed on the basis of structural information provided by SEM and TEM.

Die Flüssigphasensynthese von einkristallinen ZnO‐Scheiben und ‐Ringen (siehe Bild) in hohen Ausbeuten gelingt mit anionischen Tensiden als Templaten bei nur 70–90 °C. Über die Wachstumstemperatur und das molare Verhältnis der Reagentien lässt sich die Reaktion so steuern, dass Scheiben oder Ringe bevorzugt erhalten werden. Auf der Grundlage von Strukturinformationen aus SEM und TEM wird ein Wachstumsmechanismus vorgeschlagen.

Tetrathiometalates [WS4]2− are the nodal building blocks in a new kind of heterometallic interpenetrating three‐dimensional cluster coordination polymer (see picture) that has interesting nonlinear optical properties. The polymer exhibits optical self‐focusing behavior and reverse saturable absorption effects.

This communication reports the first example of cyclic ferric clusters with an odd number of iron atoms capped by phosphonate ligands, namely, [Fe9(mu-OH)(7)(mu-O)2(O3PC6H9)8(py)12]. The magnetic studies support a S = 1/2 ground state with an exchange coupling constant of about J approximately equal to -30 K.

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