[Ni(phen)2(3,5-DMBA)](m-MBA)2(H2O)2配合物的合成、晶体结构及电化学分析

The title complex of nickel (II) with 3,5-dimethylbenzoic acid, m-methylbenzoic acid and 1,10- phenanthroline was synthesized and characterized. Crystal data for this complex: triclinic, space group P1, a=1.198 5(2) nm, b=1.315 3(2) nm, c=1.531 8(3) nm, α=92.602(3)°, β=103.292(3)°, γ=114.849(3)°, V=2.104 7(6) nm³, D_c=1.361 g·cm^-3, Z=2, F(000)=902, final GooF=1.071, R₁=0.067 2, wR₂=0.155 5. The crystal structure shows that the nickel ion is coordinated with four nitrogen atoms of two 1,10-phenanthroline molecules and two oxygen atoms of one 3,5-dimethyl benzoic acid molecule, forming a distorted octahedral coordination geometry. The cyclic voltametric behavior of the complex was also investigated. CCDC: 286966.     

一类拟线性薛定谔方程的多解性

该文研究了强制位势下拟线性薛定谔方程的多解性问题.首先利用变量代换,将拟线性方程转化成半线性方程,然后借助喷泉定理,得到了该方程的无穷多个高能量解.     

QuEChERS/超高效液相色谱-串联质谱法测定禽蛋中90种禁用药物残留

建立了禽蛋中90种禁用药物的QuEChERS/超高效液相色谱-三重四极杆串联质谱(UPLC-QqQ-MS)检测方法。样品以0.2%甲酸-乙腈水溶液(3∶1，体积比)超声提取，加入25 mg Na₂EDTA螯合基质中的金属离子，用EMR-lipid填料净化后采用ACQUITY UPLC HSS T3柱(2.1 mm×100 mm,1.8μm)分离，正离子模式以0.1%甲酸水-甲醇为流动相，负离子模式以水-乙腈为流动相进行梯度分离，以多反应监测(MRM)方式扫描，标准曲线内标法定量。结果表明：目标物在各自质量浓度范围内呈良好的线性关系，相关系数(r²)不小于0.99，检出限(LOD)和定量下限分别为0.05～1μg/kg和0.1～3μg/kg，鸡蛋的回收率为60.8%～111%，相对标准偏差为1.6%～18%,106件实际样品共检出7种药物。该方法操作简捷、准确性高，可实现禽蛋中违禁药物残留的高通量快速检测。