European Journal of Inorganic Chemistry

Cover image for Vol. 2016 Issue 30

Editor: Karen Hindson, Deputy Editor: Preeti Vashi

Impact Factor: 2.686

ISI Journal Citation Reports © Ranking: 2015: 12/46 (Chemistry Inorganic & Nuclear)

Online ISSN: 1099-0682

Associated Title(s): Angewandte Chemie International Edition, Chemistry - A European Journal, Chemistry – An Asian Journal, ChemistryOpen, ChemCatChem, Zeitschrift für anorganische und allgemeine Chemie

2007_10/2007Anion Separation with Metal–Organic Frameworks (Eur. J. Inorg. Chem. 10/2007)

The cover picture shows the concept of selective anion separation using metal–organic frameworks. Functionalization of the coordination polymers with hydrogen-bonding groups for specific anion binding and recognition results in highly selective separations by direct anion exchange or competitive crystallization processes. The diagram in the lower-left corner depicts a qualitative model for anion separation selectivity, captured in three orthogonal concepts: complementarity (strength and number of anion-binding interactions), organizational rigidity of the framework, and softness (or degree of covalency for anion binding). The solvation-controlled (Hofmeister) selectivity that is normally observed in anion separations can be reversed (anti-Hofmeister) or completely replaced by peak selectivity (non-Hofmeister) when rigid, structurally constrained frameworks having a sufficient number of complementary anion-binding groups are employed, or when the anion is bound with a strong degree of covalency (soft–soft interactions). The background shows a structurally rigid metal–organic framework functionalized with –COOH anion-binding groups that exhibit peak selectivity for the Cl(H2O)4 anionic cluster. Details are presented in the Microreview by R. Custelcean and B. A. Moyer on p. 1321 ff.

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