Synthesis and Photophysical Properties of Dy^3＋ and Gd^3＋ Polymeric Complexes with Functionalized Polybenzimidazole Containing β-Diketone Side Group

The polymeric ligand PBIa （functionalized polybenzimidazole containing β-diketone side group） was successfully synthesized via the reaction of polybenzimidazole （PBI） with 3-Br-acetylacetone in DM SO solvent using Nail as the deprotonation reagent. Its corresponding polymeric complexes of Dy^3＋ and Gd^3＋ were prepared and characterized by FT-IR, ^1H NMR, molar conductance measurements, and thermal analysis. The photoluminescence properties and the probable mechanism of the Dy and Gd complexes were studied. The measurement and analysis of the thermal properties showed that these were thermal stable.     

ZnS/AuNPs/ITO修饰电极电化学发光法测定水中痕量铜

针对常规方法测定痕量铜有操作繁琐、灵敏度低等问题,建立了采用ZnS/AuNPs/氧化铟锡(ITO)玻璃电极电化学发光法测定痕量铜的新方法。在ITO玻璃表面,用电化学沉积法沉积AuNPs和ZnS,制备了ZnS/AuNPs/ITO电极。考察了该修饰电极的光、电化学行为,并对制备条件进行了优化。结果表明,Cu²⁺能够抑制以AuNPs为载体、ZnS为发光物质的修饰电极电化学发光,相对电化学发光值与Cu²⁺浓度的对数值在1×10^-11~5×10^-8 mol/L范围内呈线性关系,检出限为0.52×10^-11 mol/L。方法用于水样中痕量铜的测定,结果的相对标准偏差(RSD,n=6)不大于1.3%,回收率在97%~105%之间;并与电感耦合等离子体质谱法测定结果基本一致。