Abstract
Systematic solvent screening using high-throughput solvothermal syntheses with bismuth nitrate pentahydrate and 1,2,4,5-tetrakis-(4-carboxyphenyl)benzene (H4TCPB) led to three new porous Bi-metal–organic frameworks [Bi2(H2TCPB)(TCPB)(H2O)2]·xH2O (CAU-31), (NH2(CH3)2)[Bi(TCPB)(H2O)]·xH2O (CAU-32), and [Bi4(O)2(OH)2(H2TCPB)(TCPB)(H2O)2]·xH2O (CAU-33). Compounds CAU-31, -32, and -33 were synthesized in CH3OH, CH3OH/DMF, and DMF/toluene, respectively. The crystal structures were determined using electron diffraction and single-crystal X-ray diffraction in combination with the Rietveld method. The structures of CAU-31 and CAU-32 are composed of isolated Bi3+ ions as the inorganic building unit (IBU), which are connected by the linker ions to form a layered structure with inclined interpenetration and a three-dimensional anionic network, respectively. The IBU of CAU-33 consists of infinite bismuth-oxo rods forming a three-dimensional network by connection of the organic linkers. For CAU-33 structural flexibilit...
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