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Anion Separation with Metal–Organic Frameworks
Author(s) -
Custelcean Radu,
Moyer Bruce A.
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700018
Subject(s) - chemistry , hydrogen bond , selectivity , van der waals force , solvation , lewis acids and bases , metal organic framework , ion , metal ions in aqueous solution , surface modification , hofmeister series , inorganic chemistry , computational chemistry , combinatorial chemistry , molecule , organic chemistry , catalysis , adsorption
The application of metal–organic frameworks (MOFs) to anion separations with a special emphasis on anion selectivity is reviewed. The coordination frameworks are classified on the basis of the main interactions to the included anion, from weak and non‐specific van der Waals forces to more specific interactions such as coordination to Lewis acid metal centers or hydrogen bonding. The importance of anion solvation phenomena to the observed anion selectivities is highlighted, and strategies for reversing the Hofmeister bias that favors large, less hydrophilic anions, and for obtaining peak selectivities based on shape recognition are delineated. Functionalization of the anion‐binding sites in MOFs with strong and directional hydrogen‐bonding groups that are complementary to the included anion, combined with organizational rigidity of the coordination framework, appears to be the most promising approach for achieving non‐Hofmeister selectivity.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)