Cis - And trans -9,10-di(1 H -imidazol-1-yl)-anthracene based coordination polymers of Zn II and Cd II: Synthesis, crystal structures and luminescence properties

Serhii I. Vasylevskyi, Khrystyna Regeta, Albert Ruggi, Stéphane Petoud, Claude Piguet, Katharina M. Fromm

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

New functional coordination polymers based on the semi-flexible 9,10-di(1H-imidazol-1-yl)-anthracene ligand (L) with Zn II and Cd II , namely {[Zn(μ 2 -L) 2 ](ClO 4 ) 2 ·m(MeOH)·n(DCM)} n (1), {[Zn(μ 2 -L) 2 ](BF 4 ) 2 ·m(MeOH)·n(DCM)} n (2), {[Zn(μ 2 -L) 2 (p-Tos) 2 ]·m(DCM)·n(MeOH)} n (3), {[Cd(μ 2 -L) 2 (p-Tos) 2 ]·m(DCM)} n (4) {[Cd(μ 2 -L) 2 (p-Tos) 2 ]·m(MeOH)·n(Dioxane)} n (5) and {[Zn(μ 2 -L) 2 (CF 3 CO 2 ) 2 ]·2(Dioxane)} n (6), were obtained. Dissolving L in polar solvent mixtures MeOH-DCM (4:1) or MeOH-dioxane (1:1) with Zn II and Cd II salts resulted in the formation of complexes 1, 2, and 5 adopting a cis-conformation of the imidazole groups with respect to anthracene. In less polar mixtures of solvents such as MeOH-DCM (1:4) trans-L is observed, leading to the coordination polymers 3-4 with Zn II and Cd II . In an intermediate solvent mixture such as MeOH-dioxane (1:4), the cis- and trans-conformation coexist as exemplified in complex 6 with Zn II . In the solid state, complexes 1-5 assemble as supramolecular 2-D coordination polymers with a (4,4) topology, while 6 forms a tridimensional porous network with a cds topology. All compounds reveal strong blue emission in the solid state at room temperature.

Original languageEnglish
Pages (from-to)596-607
Number of pages12
JournalDalton Transactions
Volume47
Issue number2
DOIs
Publication statusPublished - 1 Jan 2018

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