Synthesis, Crystal Structure, Luminescence Property and DFT Calculations of a New Coordination Compound Containing 8-Aminoquinoline Ligand

A new luminescent compound, Zn(8-aminoql)2(SCN)2 (1, 8-aminoql = 8-amino quinoline), has been synthesized and its structure was characterized by IR, elemental analysis and X-ray single-crystal diffraction. Compound 1 belongs to the orthorhombic system, space group Pbca with a = 8.503(2), b = 14.427(4), c = 31.922(8), V = 3916.0(18)3 , Z = 8, C20H16N6S2Zn, Mr = 469.88, D c = 1.594 Mg/m3 , μ = 1.488 mm-1 , F(000) = 1920, T = 296(2) K, the final R = 0.0293 and wR = 0.0645 for all 2763 observed reflections (Ⅰ > 2σ(Ⅰ)). Compound 1 displays a 3D supramolecular architecture formed by N H···S hydrogen bonds and π···π aromatic packing interactions. Photoluminescence studies reveal that it displays obvious fluorescent emission band (λ ex = 320 nm) at 533 nm in the solid state at room temperature. The emission bands possess a broad asymmetric feature, which can be assigned to ligand-to-ligand charge transfer transitions based on DFT calculations.     

分散固相萃取-超高效液相色谱-串联质谱法同时测定蔬菜中10种新烟碱类农药残留

基于分散固相萃取前处理技术,建立了超高效液相色谱-串联质谱(UPLC-MS/MS)同时测定蔬菜中10种新烟碱类农药的检测方法。样品经乙腈提取,NaCl盐析后,提取液经50 mg C₁₈、 50 mg GCB和200 mg PSA净化,在电喷雾正离子多反应监测模式下测定,外标法定量。结果表明,10种农药在0.1～10.0μg/L范围内均呈良好的线性关系,相关系数(r)均大于0.9955,方法检出限为0.5μg/kg,方法定量限为1.0μg/kg。在1, 5和20μg/kg添加水平下,10种农药的平均回收率为73.5%～119.1%,相对标准偏差在0.60%～11%之间。该方法适用于蔬菜中10种新烟碱类农药的批量快速检测。     

饮用水中氯酸盐、亚氯酸盐的离子色谱测定方法

建立了饮用水中微量氯酸盐以及亚氯酸盐的离子色谱测定方法。结果表明,亚氯酸盐和氯酸盐在0～0.50 mg/L范围内线性良好,精密度高,亚氯酸盐r2=0.999 8,样品加标平均回收率91.5%～99.4%,相对标准偏差(RSD)0.64%～1.78%,检出限为3.98μg/L;氯酸盐r2=0.999 6,样品加标平均回收率94.7%～101.6%,相对标准偏差(RSD)0.94%～1.35%,检出限为4.65μg/L;方法操作简单、快速、准确、灵敏度高、干扰少,适用于饮水消毒副产物亚氯酸盐和氯酸盐的检测。