无机铵型ZSM系高硅沸石的合成

在不添加晶种的条件下,以无定形硅酸铝、氢氧化铵和氢氧化钠为原料,研究了原料组成及晶化温度和晶化时间等对高硅沸石合成的影响,得到了硅铝比为30—70的无机铵型ZSM系高硅沸石。     

CIO^——鲁米诺流动注射-抑制化学发光法测定银杏黄酮

基于在碱性条件下，银杏黄酮对CIO^--鲁米诺体系有显著的抑制作用，结合反相流动注射技术，建立了流动注射．抑制化学发光测定银杏提取物中的银杏黄酮。银杏黄酮质量浓度在0．4～14．0μg/ML范围与相对发光强度呈线性关系，检出限为0．06μg/ML，采样频率为120次／h，对10．0μg／ML的银杏黄酮平行测定11次，其RSD为1．2％，回收率为98、0％～104％。该方法可用于银杏黄酮制剂的测定。     

ClO--鲁米诺流动注射-抑制化学发光法测定银杏黄酮

基于在碱性条件下,银杏黄酮对ClO--鲁米诺体系有显著的抑制作用,结合反相流动注射技术,建立了流动注射-抑制化学发光测定银杏提取物中的银杏黄酮.银杏黄酮质量浓度在0.4～14.0 μg/mL范围与相对发光强度呈线性关系,检出限为0.06 μg/mL,采样频率为120次/h,对10.0 μg/mL的银杏黄酮平行测定11次,其RSD为1.2%,回收率为98.0%～104%.该方法可用于银杏黄酮制剂的测定.     

飞秒激光诱导铝等离子体时间分辨光谱研究

在大气环境下利用中心波长800nm、脉宽为30fs的激光聚焦在铝靶上,测定了激光诱导铝等离子体中铝原子的时间分辨发射谱。在局部热平衡条件近似下,根据实验测定的谱线相对强度得到了等离子体的电子温度;研究了激光脉冲能量对等离子体电子温度的影响和等离子体电子温度的时间演化特性。同时,实验发现了394.4nm和396.1nm两条铝原子谱线存在较强的自吸收效应,实验结果表明随着激光脉冲能量的减少和延时的增加,自吸收现象逐渐消失。     

In Situ Synthesis,Structural Characterization and Catalytic Properties of a 2D Cu(Ⅰ)-cyanide Coordination Polymer

A new Cu(Ⅰ) coordination polymer(CP) formulated as [Cu_2(L)(CN)_2]_n(1, L =1,1?-bis(5,6-dimethylbenzimidazole)methane) was synthesized, in which the cyanide anions were generated in situ by the cleavage of C–C bond of acetonitrile under hydrothermal conditions. CP 1 was characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. It crystallizes in the orthorhombic system, Pccn space group, with a = 10.314(3), b = 20.966(7), c =9.432(3) ?, V = 2039.5(11) ?~3, Z = 4, C_(21) H_(20) Cu_2 N_6, M_r = 483.51, D_c = 1.575 g×cm~(-3), μ = 2.105 mm~(-1) and F(000) = 984, the final R = 0.0608 and wR = 0.1942 for 1226 observed reflections with Ⅰ 2s(Ⅰ)for the CP 1. The CP 1 possesses a 2D {63} layer structure which is composed of Cu(Ⅰ) centers bridged by L and CN– ligands. The thermal stability and luminescence properties of CP 1 are discussed in detail. The complex also displays a remarkable activity for the degradation of methyl orange by hydrogen peroxide in a Fenton-like process.