Polythreading of Infinite 1D Chains into Different Structural Motifs: Two Poly(pseudo-rotaxane) Architectures Constructed by Concomitant Coordinative and Hydrogen Bonds

Two new compounds, [Co(4,4‘-bipy)(H2O)4]·(H2bptc)·2H2O (1) and [Ni(4,4‘-bipy)(H2O)4]·0.5(btc)·H2O (2) (4,4‘-bipy = 4,4‘-bipyridine, H4bptc = 3,3‘,4,4‘-biphenyltetracarboxylate acid, H4btc = 1,2,4,5-benzenetetracarboxylate acid), have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG analysis, and single-crystal X-ray diffraction. X-ray structural analysis revealed that two different structural motifs (1D covalent zigzag chain and 1D hydrogen-bonded ladder for 1 and 1D linear chain and 2D hydrogen-bonded sheet for 2) can be found within their crystal structures, and most intriguingly, they coexist in such a way that 1D covalently bonded chains of composition [M(4,4‘-bipy)(H2O)4]2+ (M = Co or Ni) thread into the hydrogen-bonded 1D ladders or 2D sheets formed by uncoordinated carboxylate anions and lattice water molecules, giving rise to overall entangled architectures with unusual poly(pseudo-rotaxane)-type arrangements. Thermal stability of the two compounds was also studied in this paper

Polythreading of Infinite 1D Chains into Different Structural Motifs: Two Poly(pseudo-rotaxane) Architectures Constructed by Concomitant Coordinative and Hydrogen Bonds

Two new compounds, [Co(4,4‘-bipy)(H2O)4]·(H2bptc)·2H2O (1) and [Ni(4,4‘-bipy)(H2O)4]·0.5(btc)·H2O (2) (4,4‘-bipy = 4,4‘-bipyridine, H4bptc = 3,3‘,4,4‘-biphenyltetracarboxylate acid, H4btc = 1,2,4,5-benzenetetracarboxylate acid), have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG analysis, and single-crystal X-ray diffraction. X-ray structural analysis revealed that two different structural motifs (1D covalent zigzag chain and 1D hydrogen-bonded ladder for 1 and 1D linear chain and 2D hydrogen-bonded sheet for 2) can be found within their crystal structures, and most intriguingly, they coexist in such a way that 1D covalently bonded chains of composition [M(4,4‘-bipy)(H2O)4]2+ (M = Co or Ni) thread into the hydrogen-bonded 1D ladders or 2D sheets formed by uncoordinated carboxylate anions and lattice water molecules, giving rise to overall entangled architectures with unusual poly(pseudo-rotaxane)-type arrangements. Thermal stability of the two compounds was also studied in this paper

Polythreading of Infinite 1D Chains into Different Structural Motifs: Two Poly(pseudo-rotaxane) Architectures Constructed by Concomitant Coordinative and Hydrogen Bonds

Two new compounds, [Co(4,4‘-bipy)(H2O)4]·(H2bptc)·2H2O (1) and [Ni(4,4‘-bipy)(H2O)4]·0.5(btc)·H2O (2) (4,4‘-bipy = 4,4‘-bipyridine, H4bptc = 3,3‘,4,4‘-biphenyltetracarboxylate acid, H4btc = 1,2,4,5-benzenetetracarboxylate acid), have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG analysis, and single-crystal X-ray diffraction. X-ray structural analysis revealed that two different structural motifs (1D covalent zigzag chain and 1D hydrogen-bonded ladder for 1 and 1D linear chain and 2D hydrogen-bonded sheet for 2) can be found within their crystal structures, and most intriguingly, they coexist in such a way that 1D covalently bonded chains of composition [M(4,4‘-bipy)(H2O)4]2+ (M = Co or Ni) thread into the hydrogen-bonded 1D ladders or 2D sheets formed by uncoordinated carboxylate anions and lattice water molecules, giving rise to overall entangled architectures with unusual poly(pseudo-rotaxane)-type arrangements. Thermal stability of the two compounds was also studied in this paper

Chiral Self-Threading Frameworks Based on Polyoxometalate Building Blocks Comprising Unprecedented Tri-Flexure Helix

Two enantiomeric chiral 3D frameworks were constructed by using an achiral ligand, nickel cations, and polyoxometalate ions as building blocks, which not only comprise unusual triflexural helical motifs but also represent the first 3D self-threading examples

A Series of Three-Dimensional Lanthanide Coordination Polymers with Rutile and Unprecedented Rutile-Related Topologies

The complexes of formulas Ln(pydc)(Hpydc) (Ln = Sm (1), Eu (2), Gd (3); H2pydc = pyridine-2,5-dicarboxylic acid) and Ln(pydc)(bc)(H2O) (Ln = Sm (4), Gd (5); Hbc = benzenecarboxylic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG analysis, and single-crystal X-ray diffraction. Compounds 1−3 are isomorphous and crystallize in the orthorhombic system, space group Pbcn. Their final three-dimensional racemic frameworks can be considered as being constructed by helix-linked scalelike sheets. Compounds 4 and 5 are isostructural and crystallize in the monoclinic system, space group P21/c. pydc ligands bridge dinuclear lanthanide centers to form the three-dimensional frameworks featuring hexagonal channels along the a-axis that are occupied by one-end-coordinated bc ligands. From the topological point of view, the five three-dimensional nets are binodal with six- and three-connected nodes, the former of which exhibit a rutile-related (4.62)2(42·69·84) topology that is unprecedented within coordination frames, and the latter two species display a distorted rutile (4.62)2(42·610·83) topology. Furthermore, the luminescent properties of 2 were studied

A Series of Three-Dimensional Lanthanide Coordination Polymers with Rutile and Unprecedented Rutile-Related Topologies

The complexes of formulas Ln(pydc)(Hpydc) (Ln = Sm (1), Eu (2), Gd (3); H2pydc = pyridine-2,5-dicarboxylic acid) and Ln(pydc)(bc)(H2O) (Ln = Sm (4), Gd (5); Hbc = benzenecarboxylic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG analysis, and single-crystal X-ray diffraction. Compounds 1−3 are isomorphous and crystallize in the orthorhombic system, space group Pbcn. Their final three-dimensional racemic frameworks can be considered as being constructed by helix-linked scalelike sheets. Compounds 4 and 5 are isostructural and crystallize in the monoclinic system, space group P21/c. pydc ligands bridge dinuclear lanthanide centers to form the three-dimensional frameworks featuring hexagonal channels along the a-axis that are occupied by one-end-coordinated bc ligands. From the topological point of view, the five three-dimensional nets are binodal with six- and three-connected nodes, the former of which exhibit a rutile-related (4.62)2(42·69·84) topology that is unprecedented within coordination frames, and the latter two species display a distorted rutile (4.62)2(42·610·83) topology. Furthermore, the luminescent properties of 2 were studied

Supramolecular Self-Assembly of Zigzag Coordination Polymer Chains: A Fascinating Three-Dimensional Polycatenated Network Featuring an Uneven “Density of Catenations” and a Three-Dimensional Porous Network

Reaction of ZnII or CdII nitrate with mixed ligands biphenylethene-4,4‘-dicarboxylate (bpea) and 1,10-phenanthroline (phen) under the same conditions affords two zigzag polymer chains [Zn(bpea)(phen)] (1) and [Cd(bpea)(phen)(H2O)]·H2O (2). The zigzag chains in 1 propagate in two non-coplanar directions (rotated by 73°) that are assembled by supramolecular forces into an intriguing three-dimensional (3D) polycatenated network featuring an uneven “density of catenation” for an individual interlocked component. In 2, however, all the zigzag chains extend in the same direction and are linked to one another by supramolecular forces into a 3D porous network featuring rectangular channels. Thermal stability of the two compounds also was studied in this paper

Supramolecular Self-Assembly of Zigzag Coordination Polymer Chains: A Fascinating Three-Dimensional Polycatenated Network Featuring an Uneven “Density of Catenations” and a Three-Dimensional Porous Network

Reaction of ZnII or CdII nitrate with mixed ligands biphenylethene-4,4‘-dicarboxylate (bpea) and 1,10-phenanthroline (phen) under the same conditions affords two zigzag polymer chains [Zn(bpea)(phen)] (1) and [Cd(bpea)(phen)(H2O)]·H2O (2). The zigzag chains in 1 propagate in two non-coplanar directions (rotated by 73°) that are assembled by supramolecular forces into an intriguing three-dimensional (3D) polycatenated network featuring an uneven “density of catenation” for an individual interlocked component. In 2, however, all the zigzag chains extend in the same direction and are linked to one another by supramolecular forces into a 3D porous network featuring rectangular channels. Thermal stability of the two compounds also was studied in this paper

Supramolecular Self-Assembly of Zigzag Coordination Polymer Chains: A Fascinating Three-Dimensional Polycatenated Network Featuring an Uneven “Density of Catenations” and a Three-Dimensional Porous Network

Reaction of ZnII or CdII nitrate with mixed ligands biphenylethene-4,4‘-dicarboxylate (bpea) and 1,10-phenanthroline (phen) under the same conditions affords two zigzag polymer chains [Zn(bpea)(phen)] (1) and [Cd(bpea)(phen)(H2O)]·H2O (2). The zigzag chains in 1 propagate in two non-coplanar directions (rotated by 73°) that are assembled by supramolecular forces into an intriguing three-dimensional (3D) polycatenated network featuring an uneven “density of catenation” for an individual interlocked component. In 2, however, all the zigzag chains extend in the same direction and are linked to one another by supramolecular forces into a 3D porous network featuring rectangular channels. Thermal stability of the two compounds also was studied in this paper

A Series of Three-Dimensional Lanthanide Coordination Polymers with Rutile and Unprecedented Rutile-Related Topologies

The complexes of formulas Ln(pydc)(Hpydc) (Ln = Sm (1), Eu (2), Gd (3); H2pydc = pyridine-2,5-dicarboxylic acid) and Ln(pydc)(bc)(H2O) (Ln = Sm (4), Gd (5); Hbc = benzenecarboxylic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG analysis, and single-crystal X-ray diffraction. Compounds 1−3 are isomorphous and crystallize in the orthorhombic system, space group Pbcn. Their final three-dimensional racemic frameworks can be considered as being constructed by helix-linked scalelike sheets. Compounds 4 and 5 are isostructural and crystallize in the monoclinic system, space group P21/c. pydc ligands bridge dinuclear lanthanide centers to form the three-dimensional frameworks featuring hexagonal channels along the a-axis that are occupied by one-end-coordinated bc ligands. From the topological point of view, the five three-dimensional nets are binodal with six- and three-connected nodes, the former of which exhibit a rutile-related (4.62)2(42·69·84) topology that is unprecedented within coordination frames, and the latter two species display a distorted rutile (4.62)2(42·610·83) topology. Furthermore, the luminescent properties of 2 were studied