title: Unprecedented Topological Complexity in a Metal-Organic Framework Constructed from Simple Building Units.
abstract: A bismuth-based metal-organic framework (MOF), [Bi(BTC)(H2O)]·2H2O·MeOH denoted CAU-17, was synthesized and found to have an exceptionally complicated structure with helical Bi-O rods cross-linked by 1,3,5-benzenetricarboxylate (BTC(3-)) ligands. Five crystallographically independent 1D channels including two hexagonal channels, two rectangular channels, and one triangular channel have accessible diameters of 9.6, 9.6, 3.6, 3.6, and 3.4 Å, respectively. The structure is further complicated by twinning. Rod-incorporated MOF structures typically have underlying nets with only one unique node and three or four unique edges. In contrast, topological analysis of CAU-17 revealed unprecedented complexity for a MOF structure with 54 unique nodes and 135 edges. The complexity originates from the rod packing and the rods themselves, which are related to aperiodic helices.
authors.affiliation: Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Str. 2, 24118 Kiel, Germany.|Berzelii Center EXSELENT on Porous Materials and Department of Materials and Environmental Chemistry, Stockholm University , Stockholm S-106 91, Sweden.
authors.forename: A Ken
authors.initials: AK
authors.lastname: Inge
authors.affiliation: Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Str. 2, 24118 Kiel, Germany.
authors.forename: Milan
authors.initials: M
authors.lastname: Köppen
authors.affiliation: Berzelii Center EXSELENT on Porous Materials and Department of Materials and Environmental Chemistry, Stockholm University , Stockholm S-106 91, Sweden.
authors.forename: Jie
authors.initials: J
authors.lastname: Su
authors.affiliation: Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Str. 2, 24118 Kiel, Germany.
authors.forename: Mark
authors.initials: M
authors.lastname: Feyand
authors.affiliation: Berzelii Center EXSELENT on Porous Materials and Department of Materials and Environmental Chemistry, Stockholm University , Stockholm S-106 91, Sweden.
authors.forename: Hongyi
authors.initials: H
authors.lastname: Xu
authors.affiliation: Berzelii Center EXSELENT on Porous Materials and Department of Materials and Environmental Chemistry, Stockholm University , Stockholm S-106 91, Sweden.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Zou
authors.affiliation: School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287-1604, United States.
authors.forename: Michael
authors.initials: M
authors.lastname: O'Keeffe
authors.affiliation: Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Str. 2, 24118 Kiel, Germany.
authors.forename: Norbert
authors.initials: N
authors.lastname: Stock