A simple pyrene-based triazole receptor has been synthesised and shown to self-assemble in the presence of ZnCl(2) in an exclusively 2:1 ratio, whereas a mixture of 2:1 and 1:1 ratios are observed for other Zn(2+) salts. The pyrene units are syn in orientation; this is supported by a strong excimer signal observed at 410 nm in the presence of ZnCl(2) in acetonitrile. DFT calculations and 2D NMR support the proposed structure.
An anthracene molecular probe has been synthesised and shown to target mephedrone, a stimulant drug from the cathinone class of new psychoactive substances (NPS). A protocol has been developed to detect mephedrone via the probe using NMR spectroscopy in a simulated street sample containing two of the most common cutting agents, benzocaine and caffeine.
Aluminium and titanium halides have been shown to react with 38hydroxy-A6-steroids, and their acetates, to give the corresponding halides in good yields. Reaction of androst-5-ene-38 : 17S-diol with aluminium chloride caused selective replacement of the 3f~hydroxyl group. A new preparation of aluminium iodide is described. l Noms and Sturgis,
A Pyrene-Based Fluorescent Sensor for Zn 2+ Ions: A Molecular "Butterfly". -The title compound (III) self-assembles in the presence of ZnCl2 in an exclusively 2:1 ratio. -(MANANDHAR, E.; BROOME, J. H.; MYRICK, J.; LAGRONE, W.; CRAGG, P. J.; WALLACE*, K. J.; Chem. Commun. (Cambridge) 47 (2011) 31, 8796-8798, http://dx.doi.org/10.1039/c1cc13286e ; Dep. Chem. Biochem., Univ. South. Miss., Hattiesburg, MS 39406, USA; Eng.) -M. Paetzel 49-125
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