Wei-Nan Wang

Synthesis, structure, surface photovoltage and magnetic properties of a novel 3D homochiral manganese phosphonate with right-handed helical chains

A novel 3D homochiral manganese phosphonate with right-handed helical chains, [enH2]0.5Mn2[(HL)(L)] (1) (H3L = 2-hydroxyphosphonoacetic acid; en = ethylenediamine) has been synthesized by hydrothermal techniques. X-Ray diffraction analysis indicates that compound 1 consists of A channels with right-handed single helical chains, B channels with right-handed double helical chains and C channels with achiral channels that are connected through manganese centers and L3− ligands to form a homochiral coordination polymer. Surface photovoltage spectroscopy (SPS) of compound 1 indicates that it possesses positive SPV response in the range of 300–600 nm and shows p-type semiconductor characteristic. Magnetic susceptibility studies of compounds 1 reveal that there exist weak antiferromagnetic interactions between the manganese centers.

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.

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