title: A step closer to the binary: the (1)(∞)[Bi6I20](2-) anion.
abstract: A series of crown ether based iodidobismuthates was prepared from dibenzo-18-crown-6 (DB18C6), BiI3 and NaI or KI in acetonitrile (MeCN). The resulting compounds [(DB18C6)Na(MeCN)2]4[Bi6I22]·2MeCN (1), [(DB18C6)Na(MeCN)2]4[Bi8I28]·6MeCN (2), [(DB18C6)Na(MeCN)2]2[Bi6I20]·3MeCN (3) and [(DB18C6)K(MeCN)]4[Bi6I22]·2MeCN (4) have been used to explore the templating effect of different crown ether based cations and the influence of the I/Bi ratio and II interactions on the optical properties of iodidobismuthates. Compound 3 contains the strand-like anion (1)(∞)[Bi6I20](2-), which displays a I/Bi ratio of 3.33, closer to the binary BiI3 than any other iodidobismuthate.
authors.affiliation: Fachbereich Chemie and Wissenschaftliches Zentrum für Materialwissenschaften (WZMW), Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg, Germany. johanna.heine@chemie.uni-marburg.de.
authors.forename: Johanna
authors.initials: J
authors.lastname: Heine