No abstract

A simple solution: Simply dissolving three commercially available dyes and two metal salts in a buffer is sufficient to create a sensor which allows the identification of dipeptides with high selectivity by using UV/Vis spectroscopy (see picture for the adaptive behaviour of a dynamic mixture of colored compounds A–H).

Indicator-displacement assays based on the organometallic complex [{Cp*RhCl2}2] (Cp*=pentamethylcyclopentadienyl) and the dye gallocyanine were used to sense amino sugars and aminoglycosides in buffered aqueous solution by conducting UV-visible spectroscopy. The data of three assays at pH 7.0, 8.0, and 9.0 were sufficient to distinguish between the amino sugars galactosamine, glucosamine, mannosamine and the aminoglycosides kanamycin A, kanamycin B, amikacin, apramycin, paromomycin, and streptomycin. Furthermore, the assays were used to characterize mixtures of aminoglycosides and obtain quantitative information about the respective analytes.

The reaction of [ReBr3(CO)3][NEt4]2 with 3‐hydroxy‐1,2,3‐benzotriazine‐4(3H)‐one in the presence of base gave the ionic rhenium complex [ReBr(C7H4N3O2)(CO)3][NEt4] (2) which was crystallographically characterized. A neutral metallamacrocycle 3 was obtained upon abstraction of [NEt4]Br from complex 2. This complex cocrystallizes with an unusual C3‐symmetric [Ag(η2‐benzene)3(OH2)][BF4] complex as evidenced by single‐crystal X‐ray diffraction. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

A multicomponent indicator displacement assay (MIDA) based on an organometallic receptor and three dyes can be used for the identification and quantification of nucleotides in aqueous solution at neutral pH.