Synthesis,Crystal Structure and Spectral Property of a Water-bridged Co(Ⅱ) Coordination Polymer with 3-Flavonoxylacetic Acid Ligand

A new cobalt complex with flavonoid carboxylate ligand was synthesized and characterized. X-ray diffraction data revealed that the compound crystallizes in the monoclinic crystal system, space group P2_1/c with a = 7.936(3), b = 21.475(7), c = 20.010(7) ?, β = 102.856(14)o, V = 3325(2) ?~3, Z = 4, C_(34)H_(32)CoO_(15), M_r = 739.53, D_c = 1.477 g/cm~3, F(000) = 1532, μ = 0.591 mm~(-1), R = 0.1123 and w R = 0.1419. In the crystal structure, the Co(Ⅱ) shows 6 coordination geometry, and the flavonoid ligand coordinated with the Co(Ⅱ) ion in a monodentate mode. Hydrogen bonding interactions and π-π stacking interactions lead to the three-dimensional stacking of crystal and increase its stability. Moreover, the thermal stability and luminescent properties of the complex are also investigated. The fluorescence of the complex shows a great reduction of the intensity than that of the ligand.     

层状二硫化钼纳米材料的研究进展

二硫化钼由于具有合适的层间间距、间隙可调、较高的机械强度、比较稳定的化学性质等,引起了国内外科研人员的高度重视,成为下一代光电子器件的理想材料.它被广泛应用于各种领域,如太阳能电池、光电探测器、场效应晶体管、传感器、存储器等.本文综述了二硫化钼的最新进展,主要包括二硫化钼的晶体结构、能带结构和光学性质,介绍了二硫化钼的制备方法,总结了表征二硫化钼结构的方法,归纳了层状二硫化钼在光电子器件以及微电子器件等领域的制备与应用,最后提出了该研究领域的挑战与机遇.