Synthesis and Crystal Structure of Sm Cu7.73In3.27: a New 3D Framework Based on [Cu5In4M4]（M=Cu/In） Cluster

A new intermetallic compound, SmC u7.73In3.27, has been synthesized by solid-state reaction of the corresponding pure elements at high temperature, and structurally characterized by single-crystal X-ray diffraction study. SmC u7.73In3.27 crystallizes in tetragonal space group P4/mbm with a = 8.6213(4), c = 10.2538(9), V = 762.13(8) A3, Z = 4, Mr = 1018.90, Dc = 8.880 g/cm3, μ =38.244 mm-1, F(000) = 1789, and the final R = 0.0374 and w R = 0.0836 for 514 observed reflections with I 2σ(I). The structure of SmC u7.69In3.31 belongs to a new structure type and features a three-dimensional(3D) [Cu5In2M4](M = Cu/In) framework composed of [Cu5In4M4] clusters interconnected via sharing In atoms as well as Cu–In and In–In bonds. The Sm atoms are located in the one-dimensional(1D) tunnels along the c-axis. The structural relationship of the title compound with other similar Sm-Cu-In phases was also studied. Band structure calculations based on Density Functional Theory(DFT) method indicate that SmC u7.69In3.31 is metallic.     

一种用于测定尼古丁的新型压电石英晶体传感器的研制

本文将含有四苯硼钠的聚氯乙烯(PVC)敏感膜涂渍在压电石英晶体(PQC)表面,制成尼古丁传感器,该传感器在pH 5.0~7.5的范围内,对1.0×10-6~1.0×10-2mol/L的尼古丁水溶液有很好的线性响应,检出限为8.0×10-7mol/L。本法较紫外分光光度法有更宽的线性范围和更低的检出限。