Cui-Ying Huang

Synthesis, crystal structure and luminescence properties of eight new lanthanide carboxyphosphonates with a 3D framework structure

By using the carboxyphosphonic acid as the ligand, eight new three-dimensional (3D) lanthanide carboxyphosphonates, namely Ln[L(H2O)2]·2H2O (Ln = Ce (1), Pr (2), Nd (3), Sm (4), Eu (5), Gd (6), Y (7), Tb (8); H3L = H2O3PCH2–NC5H9–COOH) have been synthesized under hydrothermal conditions and structurally characterized by X-ray single-crystal diffraction, X-ray powder diffraction, infrared spectroscopy, elemental analysis and thermogravimetric analysis. The eight isomorphous compounds feature a 3D framework structure. In these compounds, the inorganic chains based on LnO8 and CPO3 polyhedra are interconnected through carboxyphosphonate ligands to form a 3D framework structure with a channel system. The result of connections in this manner is the formation of 40- and 24-atom rings that run in the a- and b-axis directions. The luminescence properties of compounds 5 and 8 have also been studied.

Bis(dicyanamido-κN)(di-2-pyridylamine-κ2N,N′)zinc(II)

The title mononuclear ZnII complex, [Zn(C2N3)2(C10H9N3)2], is isostructural with its MnII, CoII and NiII analogues. The ZnII atom lies on a crystallographic twofold rotation axis and is coordinated by two bidentate di-2-pyridylamine ligands and by two dicyanamide ligands in a cis orientation.

CCDC 784630: Experimental Crystal Structure Determination

Related Article: Wei-Nan Wang, Zhen-Gang Sun, Yan-Yu Zhu, Da-Peng Dong, Jing Li, Fei Tong, Cui-Ying Huang, Kai Chen, Chao Li, Cheng-Qi Jiao, Cheng-Lin Wan|2011|CrystEngComm|13|6099|doi:10.1039/c1ce05291h

2-(1,3-Dithian-2-yl­idene)-1-phenyl­butane-1,3-dione

The title compound, C13H12O2S2, belonging to the group of dioxoketene cyclic S,S-acetals, was prepared from the corresponding dione in high yield. In the structure, the C=O and C=C bonds are not coplanar, with O=C—C=C torsion angles of −36.8 (4) and −21.0 (4)°. The dithian ring has a twisted conformation.