Os(VI)O2/K Metal–Organic Frameworks: Infinite Chain, Grid, and Porous Networks

• Published in: Crystal growth & design 2014-06, Vol.14 (6), p.2703-2708
• Main Authors: Eckshtain-Levi, Meital, Yufit, Dmitry, Shimon, Linda J. W, Kirillov, Alexander M, Benisvy, Laurent
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Organic compounds; Other materials; Physics; Porous materials; granular materials; Specific materials; Structure of solids and liquids; crystallography; Structure of specific crystalline solids
• ISSN: 1528-7483; 1528-7505
• DOI: 10.1021/cg4016178

The design of multianionic chelating ligands as new organic linker for producing metal–organic frameworks (MOFs) is discussed. Three potentially polyanionic pro-ligands, 3,5-di-tert-butyl-2-hydroxy-N-(2-hydroxyethyl)benzamide (1LH3), bis(2-aminoethyl)-5-(tert-butyl)-2-hydroxyisophthalate (2aLH3), and 5-(tert-butyl)-2-hydroxy-N1,N3-bis(1-hydroxy-2-methylpropan-2-yl)isophthalamide (2bLH3), were synthesized and found to coordinate the osmyl ion in trianionic NO2 fashion through the N-amidate, O-phenolate, and O-alcoholate donor atoms. The X-ray crystal structures of three dioxo-Os(VI) complexes: [Os2O4(1L)2(OH)K2(H2O)(C3H6O)] (Os 1 ), [OsO2(2aL3–)(MeOH)4(MeO)K2] (Os 2a ), and [OsO2(2bL)(H2O)(C3H6O)K] (Os 2b ) reveal that the osmyl moiety and the ligand establish distinctive interactions with the potassium ions, yielding unprecedented infinite network from stepladder chain (in Os 2b ) and 2D-grid (in Os 1 ) to 3D-porous H-bonding network (in Os 2a ).