Xiu-Cun Liu

Role of cooperative templates in the self-assembly process of microporous structures: syntheses and characterization of 12 new silver halide/thiocyanate supramolecular polymers

12 new cation-templated complexes, {(BMPB)[AgI3]} (BMPB = 1, 4-bis (methylpyridinium) benzene) (1), {(BPE)2[Ag2I6]} (BPE = 1, 2-bis (pyridinium) ethane) (2), {(BPB)[Ag2I4]} (BPB = 1, 4-bis (pyridinium) butane) (3), {(BPH)[Ag2I4]} (BPH = 1, 7-bis (pyridinium) heptane) (4), {(DIBP)[Ag2I4]} (DIBP = 1, 1′-diisopropyl-4, 4′-bipyridinium) (5), {(BPB)[Ag2Br4]} (6), {(BPP)[Ag2Br4]} (=1, 5-bis (pyridinium) pentane) (7), {(DEBP)[Ag2Br4]} (DEBP = 1, 1′-diethyl-4, 4′-bipyridinium) (8), {(BDMLB)[Ag2Br4]} (BDMLB = 1, 4-bis (dimethylimidazolium) butane) (9), {(BPIB·Br)[Ag(NCS)2]} (BPIB·Br = butane phenanthroline bromide) (10), {(DABP)[Ag4I6]} (DABP = 1, 1′-diamyl-4, 4′-bipyridinium) (11), {(BMLB)[Ag2Br2(NCS)2]} (BMLB = 1, 4-bis (methylimidazolium) butane) (12), have been synthesized via the self-assembly reaction in solution. Owing to the cooperative template effects from organic cations and halide/thiocyanate anion compounds 1–11 contain a mononuclear anion structure [AgI3]2− (1), a dimeric anion [Ag2I6]4− (2), linear chain [Ag2X4]2− (3–10) and a cubane-like based one-dimensional anionic chain [Ag4I6]2− (11) that are enclosed into the different cationic channels formed from the pyridinium, phenanthrolinium and imidazolium. While for 12, the compound possesses an infinite 2D supramolecular polypseudorotaxane penetrated by geminal dicationic groups.

Three novel cation-templated metal thiocyanates with 1-2D polypseudorotaxane frameworks

Three novel cation-templated complexes, {(BPE)3[Ag4Br4(SCN)6]}n (1), {(DEBP) [Cu2(SCN)4]}n (2) and {(DIBP) [Cu2(SCN)4]}n (3) [BPE = 1, 2-bis (pyridinium) ethane; DEBP = 1, 1′-diethyl-4, 4′-bipyridinium dibromide; DIBP = 1, 1′-diisopentyl-4, 4′-bipyridinium], have been synthesized viaself-assembly reaction in solution. Complex 1 possesses a one-dimensional polyrotaxane architecture with the organic cation BPE trapped in it, whereas both compounds 2 and 3 are infinite 2D supramolecular polypseudorotaxane, linked by bridging thiocyanate groups. All compounds were further characterized with IR spectra, thermal analysis, ultraviolet and fluorescence properties.

Self-assembly, Crystal Structure and Fluorescent Property of a Coordination Polymer [(Cu4I6)(BPE)]n

A novel coordination polymer [(Cu 4 I 6 )(BPE)]n(BPE = 1, 2-bis(pyridinium) ethane dication) is obtained and characterized by X-ray crystallography and IR spectroscopy. The complex crystallizes in monoclinic system, space group C2(1)/c with cell parameters of a = 16.5429(19) Å, b = 10.0645(12) Å, c = 11.7139(13) Å, α = 90.00°, β = 99.0910(10)°, γ = 90.00°. In the polymeric framework, [Cu 4 I 6 ]n dimers are bridged together by the two μ 2 -I ligands to constitute an infinite 1D chain with the organic dication BPE trapped in it. Photoluminescence investigation of the complex reveals that a red shift of 67 nm for the complex takes place, compared with the organic dication.

Synthesis, Structure and Fluorescence Properties of a Coordination Polymer [Cu2(SCN)4(BPX)]n with 1D Ladder-Shaped Structure

A coordination polymer, [Cu2(SCN)4(BPX)]n(BPX = 1,4-bis(pyridinium) xylol) was synthesized and characterized by IR spectrum, fluorescence spectrum and single crystal X-ray diffraction. Crystal structure revealed that the title compound crystallized in monoclinic system with space group P2(1)/c, a = 5.7540(7)Å, b = 12.7203(15) Å, c = 17.598(2) Å, β = 94.9940(10)°. Two SCN−ions served as bridging ligands to link two Cu(I) ions, giving rise to an eight-member ring. Furthermore, copper atom and sulfur atom of the eight-member ring bonded sulfur atom and copper atom of adjacent eight-member ring through the formation of Cu-S to form a small four-member ring. Thus, innumerable eight-member rings alternately linked four-member rings each other to form an infinite one-dimensional ladder-shaped structure.

Synthesis and Structure of a HgCl2 Coordination Polymer With 1,4-Bis(benzimidazole-1-yl-methylene)benzene (bbmb)

In this study, solution reaction of mercury dichloride with organic multifunctional ligand 1,4-bis(benzimidazole-1-yl-methylene)benzene generated a 1D polymer [HgCl2 (bbmb)·2H2O ·CH3OH]n 1, and the crystal structure has been determined (C46H60Cl4Hg2N8O10), Mr = 1428.00, a = 14.703(15) Å, b = 17.248(17) Å, c = 14.91(2) Å, β = 114.869(10)°, space group C2/c, Z = 2, and V = 3430(7) Å3. In 1 the tetrahedral coordination of Hg(II) and the conformation of the bbmb ligand make it a wave-shaped structure. Supplemental materials are available for this article. Go to the publishers online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

2,3‐Di‐4‐pyridylbutane‐2,3‐diol

The molecule of the title compound, C14H16N 2O2, lies on a centre of inversion located at the mid-point of the central C-C bond. O-H⋯N hydrogen bonds link adjacent molecules into a layer motif.

Synthesis and Structural Characterization of Cation-Induced Complex: [Cd4(SCN)6(BPB)]n With One-Dimensional Double Helix

In this study, colorless crystals of the title inorganic-organic hybrid compound were obtained from the solution-phase reaction of cadmium thiocyanate with BPB·Br2 in MeOH/DMF(BPB·Br2 = 1,4-bis(pyridinium)butane dibromine). And single-crystal X-ray diffraction analysis revealed that this polymer crystallized in triclinic, space group P–1 with unit cell parameters a = 5.8855(5) Å, b = 9.5996(8) Å, c = 11.4358(9) Å, α = 69.9710(10)°, β = 75.1100 (10)°, γ = 75.8180(10)°. In this compound, each cadmium atom is octahedrally coordinated in 2S4N geometry and doubly bridged infinite one-dimensional double helix cadmium thiocyanate chains act as inorganic moiety with dication discretely surrounded. Supplemental materials are available for this article. Go to the publishers online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Syntheses and Crystal Structures of Five Supramolecular Halides/Pseudohalides ([(ZnCl4)(bppt)], [(CdCl4)(bppt)], [(CdI4)(bppt)], [(HgCl3Br)(bppt)] and [(Ag2Br4)(bppt)]n) Directed by 1,5-bis(pyridinium)pentane Cation

Five supramolecular compounds oriented by bppt[1, 5-bis (pyridinium)pentane cation], [(ZnCl4)(bppt)](1), [CdCl4(bppt)](2), [(CdI4)(bppt)](3), [(HgCl3Br)(bppt)](4), and [(Ag2Br4)(bppt)]n(5) were synthesized and characterized by X-ray crystallography. The crystal structures of 1–4 are mononuclear tetrahalidmetallates and show that they crystallize in monoclinic systems except compound 3, which is in triclinic system. Compound 5 is in monoclinic system, space group P2 (1)/n in which each monovalent Ag atom is tetrahedrally coordinated by four μ2-Br atom ligands to constitute an infinite 1D (Ag2Br4 2−) anion chain with the organic dication bppt2+ ([C15H20N2]2+) trapped in it. Supplemental materials are available for this article. Go to the publishers online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Syntheses, Crystal Structures of Five Supramolecular Halides/Pseudohalides: (BPP)[CdI4], (BPP)[HgBr4], (BPP)[Hg(SCN)Br3], (BPP)[ZnBr0.32Cl0.68(NCS)3], and (BPP)[Fe(CN)6]·2.5H2O Directed by 1,3-bis(pyridinium) Propane Cation

Five supramolecular compounds (BPP)[CdI4] 1, (BPP)[HgBr4] 2, (BPP)[Hg(SCN)Br3] 3, (BPP)[ZnBr0.32Cl0.68(NCS)3] 4, and (BPP)[Fe(CN)6]·2.5H2O 5 (BPP = 1,3-bis(pyridinium) propane) were synthesized and characterized by IR spectrum and X-ray crystallography. The crystal structures of 1–3 show that they all crystallize in monoclinic systems with mononuclear tetrahalidometallate structure. Compound 4 crystallizes in triclinic system, space group P–1 in which three SCN− ions serve as bridging ligands to link one Zn(II) ions, giving rise to a approximate tetrahedron. Compound 5 crystallized in a monoclinic system and the Fe2+ center resided in a slightly distorted octahedral environment and was six-coordinated by six SCN− ions.

Three Novel Metal Supramolecular Polymers Directed by 1,2-bis(pyridinium)ethane Cation: Syntheses and Crystal Structures

Three novel supramolecular polymers, [(Cd2Cl3)(H2O)2(N3)3 (bpe)] (bpe = 1,2-bis(pyridinium)ethane)(1), [(ZnCl4)(bpe) (ZnCl3N3)(bpe)](2), and [(CdCl2Br2)(bpe)] (3), were synthesized in polar organic solvents using solvent diffusion method, and the three compounds have been characterized by single-crystal X-ray diffraction and IR spectroscopy. Compound 1 comprises discrete bpe cations and centrosymmetric tetrameric anions in which cadmium(II) centers have two distinct coordination modes (four- and six-coordinated) bridged by end-on azide. The three-dimensional (3-D) organic–inorganic hybrid supramolecular structure is formed by a series of hydrogen bonds (O-H···Cl and O-H···N). Compared with compound 1, the reactants of complex 2 also include sodium azide, bpe2+ and transition metal salt except that ZnCl2 instead of CdCl2, but compound 2 is only a mononuclear complex with two different tetrahedral configuration of Zn centers. The mononuclear compound 3 crystallizes in orthorhombic system with the space group Pnma, and the Cd(I) atom is four-coordinated in a distorted tetrahedral geometry by two terminal Cl and two terminal Br.