Guo-Bi Li

Assembly of a 1D Coordination Polymer through in Situ Formation of a New Ligand by Double C−C Coupling on CHCl3 under Solvothermal Conditions

A rare in situ metal/ligand reaction has been observed during the assembly of a manganese-coordination polymer under solvothermal conditions, which leads to double C-C coupling on CHCl(3) involving cleavage of three C-Cl bonds and the formation of two new C-C bonds at the same carbon center.

Construction of a novel Zn-Ni trinuclear Schiff base and a Ni2+ chemosensor.

A novel Zn-Ni heterotrinuclear Schiff base compound bearing acacen(2-) moieties was constructed through the selective assembly of a chemosensor Schiff base zinc compound with a Ni(2+) ion. Its crystal structure not only clearly explains the binding mode between the chemosensor molecule and the detected metal ion but also represents the first trinuclear complex based on a symmetric acacen(2-) base Schiff base.

Anion effect on the structural diversity of three 1D coordination polymers based on a pyridyl diimide ligand

Three new zinc coordination polymers, namely {[Zn(4-pmntd)Cl2]·H2O}n (1), {[Zn(4-pmntd)(CH3CN)4]·(ClO4)2·H2O}n (2), and {[Zn(4-pmntd)(H2O)4]·(CF3SO3)2·3H2O}n (3) (4-pmntd = N,N′-bis(4-pyridylmethyl)-naphthalene diimide) have been synthesized by reactions of 4-pmntd with ZnCl2, Zn(ClO4)2, and Zn(CF3SO3)2, respectively. Compound 1 is an unusual one-dimensional (1D) single-stranded double helical chain containing tubular channels; 2 is an uncommon 1D zigzag chain arranged in a cross-like fashion to generate a 3D plywood-like array; 3 is a typical 1D zigzag chain arranged in a parallel array containing 1D quadrangle channels to accommodate the counter anions and water molecules. The structural diversity in these compounds is attributed to different coordination abilities, sizes, and geometries of counter anions. The anion exchange property of 3 was investigated.

Structural disorder and transformation in crystal growth: direct observation of ring-opening isomerization in a metal–organic solid solution

The co-crystallization of cyclic and polymeric isomers in the same crystal in varying ratios with the skeleton frameworks packed in a geometrically compatible and energetically similar fashion gives a chance to rationalize ring-opening isomerization in a crystal growth process.

1,4-Bis(1H-benzotriazol-1-yl­methyl)­benzene tetrahydrate

Molecules of the title compound, C20H16N6.4H2O, lie across crystallographic inversion centres. The dihedral angle between each benzotriazole moiety and the central benzene ring is 74.95 (9)°. In the crystal structure, the molecular organization is stabilized by well defined weak C—H⋯π, π–π, O—H⋯O and O—H⋯N intermolecular interactions, leading to the formation of a two-dimensional network.