Sheng-Li Liu

Hydrothermal syntheses, crystal structures and antibacterial activities of two transition metal complexes with ciprofloxacin

Hydrothermal reactions of ciprofloxacin with Co(OH)2, and with oxalate and Fe(OH)3, yield [Co(Cip)2] · 2H2O (1) and [Fe(H-Cip) · (C2O4)] · (H2Cip) · 5H2O (2), which were characterized by elemental analysis, IR and single crystal diffraction analyses. Compounds 1 and 2 were screened for antibacterial activities against Staphylococcus aureas, Escherichia coli, Candida albicans and Pseudomonas aeruginosa.

Syntheses and crystal structures of Zn(II) and Co(II) complexes with ofloxacin and enoxacin

[Zn(Ofl) · (H2O)] · 2H2O (1) and [Co(Enox)2] · 4H2O (2) were obtained by hydrothermal reactions. The solid-state structures have been characterized by IR spectroscopy and single crystal X-ray diffraction analyses. Complex 1 crystallizes in the triclinic system, space group P 1, with lattice parameters a = 9.2923(5), b = 11.3432(6), c = 17.7722(10) Å, α = 92.839(3), β = 94.826(3), γ = 91.909(3)°, V = 1863.01(18) Å3, Z = 2, D Calcd = 1.494 mg m−3. The coordination environment around Zn2+ is a slightly distorted square pyramid. Complex 2 crystallizes in the triclinic system, space group P2(1)/c, with lattice parameters a = 5.97980(10), b = 21.4183(3), c = 13.1539(2) Å, V = 100.2810(10), Z = 2, D Calcd = 1.526 mg m−3, Co(II) ion is a distorted octahedral geometry.

Crystal structures and antibacterial activities of two enoxacin based compounds

Hydrothermal reactions of Cu(ClO4)2 · 6H2O and Cu(SO4)2 · 5H2O with enoxacin yielded two compounds, (H2-Eno) · ClO4 (1) and [Cu(H-Eno) · (H2O)2 · SO4] · 2H2O (2). Their solid-state structures have been characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction analyses. Compounds 1 and 2 were screened for antibacterial activity against Staphylococcus aureas, Escherichia coli, Pseudomonas aeruginos and Candida albicans.

Syntheses and crystal structure studies of two compounds of quinolones

Two complexes with enoxacin and ciprofloxacin were synthesized and the crystal structures are reported. Compound 1, [Cu(H-Eno) · Cl2] · 3H2O (H-Eno = Enoxacin), crystallizes in the triclinic system, space group P 1, with lattice parameters a = 8.7731(12) Å, b = 9.4976(14) Å, c = 13.2033(19) Å, α = 86.319(7)°, β = 71.912(7)°, γ = 80.604(7)°, V = 1031.6(3) Å3, Z = 2, D c = 1.625 mgm−3. 2, [Mn(Cip)2] · 2H2O (Cip = mono-anion of ciprofloxacin), crystallizes in the monoclinic, space group P2(1)/c, with lattice parameters a = 5.85690(10), b = 21.9490(6), c = 13.4443(3) Å, β = 100.9700(10)°, V = 1696.72(7) Å3, Z = 2, D c = 1.459 mgm−3.

Hydrothermal syntheses, crystal structures and antibacterial activities of two Cu(II) complexes with quinolones

Hydrothermal reactions of ciprofloxacin with Cu(ClO4)2 · 6H2O, and ofloxacin with Cu(CH3COO)2 · 4H2O, yield two metal complexes: [Cu(H-Cip)2] · (ClO4)2 · 6H2O (1) and [Cu(Ofl)2 · H2O] · 2H2O (2), which were characterized by elemental analysis, IR and single crystal diffraction analyses. Compounds 1 and 2 were screened for antibacterial activities against Staphylococcus aureus, Escherichia coli, Candida albicans and pseudomonas aeruginosa.

Syntheses and crystal structure studies of two zinc complexes of enoxacin

Two zinc complexes of enoxacin were synthesized and their crystal structures were determined. Compound 1, [Zn(H-Eno) · Cl2] · 3H2O (H-Eno = Enoxacin), crystallizes in the triclinic system, space group P 1, with lattice parameters a = 8.7731(12), b = 9.4976(14), and c = 13.2033(19) Å, α = 86.319(7)°, β = 71.912(7)°, and γ = 80.604(7)°, V = 1031.6(3) Å3, Z = 2, D Calcd = 1.631 Mg m−3; compound 2, [Zn(H-Eno) · (H2O)2] · 2NO3, also crystallizes in the triclinic system, space group P 1, with lattice parameters a = 8.751(2), b = 9.014(2), and c = 12.594(3) Å, α = 92.277(14)°, β = 109.867(12)°, and γ = 111.469(12)°, V = 854.1(3) Å3, Z = 1, D Calcd = 1.684 Mg m−3.

Three lanthanide coordination polymers with nitrilotriacetic acid: hydrothermal syntheses, crystal structures and fluorescent property

Hydrothermal reactions of Sm2O3, Gd(ClO4)3 · 6H2O and Tb(ClO4)3 · 6H2O with nitrilotriacetic acid, give rise to three lanthanide coordination polymers, {[Sm(NTA)(H2O)2] · H2O} n (1), {[Gd(NTA)(H2O)] · H2O} n (2) and {[Tb(NTA)(H2O)] · H2O} n (3). Their solid-state structures have been characterized by elemental analysis, and IR spectroscopy. X-ray single-crystal diffraction analyses indicated that 2 and 3 are isomorphous three-dimensional coordination polymers with eight-coordinate Gd(III) (or Tb(III)), while 1 forms a two-dimensional coordination polymer containing nine-coordinate Sm(III). The photophysical properties of 3 have been studied with excitation and emission spectra, which exhibit strong green emission.

Double chains-copper(I)-based coordination polymer with strong blue fluorescent emission

A solvothermal reaction of Cu(CN) with triphenylphosphine yielded a double-chain coordination polymer of the formula C20H15Cu2N2P (I). X-ray diffraction study shows that complex I crystallizes in the monoclinic system, space group P21/n, with lattice parameters a = 9.3017(8), b = 12.4273(13), c = 16.0505(15) Å, β = 91.688(6)°, V = 1854.6(3) Å3, Z = 4, and ρcalcd = 1.581 mg m−3. The Cu(I) atoms show difference in the coordination environment. Complex I emits strong blue fluorescence light (λem(max) = 516 nm), when it is excited by the UV light (λexc(max) = 250 nm) in the solid state at room temperature.

A 1D coordination polymer {Pb[C6H4(COO)2][phen]} n with strong blue fluorescent emission

The hydrothermal reaction of 1,3-dicyanobenzene, 1,10-phenanthroline (phen) and Pb(CH3COO)2 yields a new 1D coordination polymer, {Pb[C6H4(COO)2][phen]} n . The 1,3-benzenecarboxylate anion found in the final product was generated in situ during the synthesis by hydrolysis of 1,3-dicyanobenzene. X-ray diffraction shows that complex 1 crystallizes in the triclinic system, space group P 1, a = 7.5442(2) Å, b = 9.7962(3) Å, c = 13.1505(4) Å, α = 69.739(2) Å, β = 80.597(2) Å, γ = 71.377(2) Å, v = 862.48(4) Å3, Z = 2, D c = 2.124 Mg m−3. Complex 1 emits strong blue fluorescent light (λem(max) = 482.4 nm) when excited by UV light in the solid state at room temperature.

Synthesis, crystal structure and magnetic properties of a 1D coordination polymer[Ni(phth)(phen)(H2O)] n · n H2O

A new one-dimensional coordination polymer [Ni(phth)(phen)(H2O)] n  · nH2O was synthesized. The structure was determined by X-ray crystallography revealing that each nickel atom is five-coordinate bridged via phthalate ion to form a zigzag chain. The chains are further linked together via hydrogen-bonding interactions to construct a three dimensional supramolecular network. The magnetic properties of the complex show that there are weak antiferromagnetic interactions between Ni(II) centers.