Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, China.
Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, China; Institute of Applied Chemistry, China West Normal University, Nanchong 637002, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Jan 15;225:117519. doi: 10.1016/j.saa.2019.117519. Epub 2019 Sep 7.
Poly(sodium-p-styrenesulfonate)-enhanced and D-penicillamine stabilized Ag nanoclusters (PSS-DPA-AgNCs) were prepared using one-step ultraviolet irradiation combined with microwave heating method, and the effects of the AgNCs photo-luminescence performance based on different types of polyelectrolytes and energy suppliers were studied detailedly. The as-prepared AgNCs can be used as a viable fluorescent probe for monitoring indirectly iron(II) lactate hydrate (ILH) and ammonium ferric citrate (AFC), respectively. The fluorescence (FL) quenching of PSS-DPA-AgNCs by Fe (it is obtained from oxidized ILH/ionized AFC) mainly derives from a dynamic quenching process. Excellent linear relationships exist between the FL quenching degree of the AgNCs and the concentrations of ILH/AFC in the range of 0.17-6.00/0.067-3.33 μmol·L, and corresponding limit of detection (at 3σ/slope) is 12.4/6.04 nmol·L. Moreover, the AgNCs probe was extended to the assays of ILH in tablets, solid beverage or ILH additive and AFC in two kinds of edible salts or syrup with satisfactory results compared with the standard 1, 10-phenanthroline method. In addition, the AgNCs probe reveals a good temperature sensing capability.
采用一步紫外光辐照联合微波加热法制备了聚（苯乙烯磺酸钠）-增强和 D-青霉胺稳定的 Ag 纳米团簇（PSS-DPA-AgNCs），详细研究了不同类型的聚电解质和能量供体对 AgNCs 光致发光性能的影响。所制备的 AgNCs 可分别作为监测水合乳酸亚铁（ILH）和柠檬酸铁铵（AFC）的荧光探针。AgNCs 的荧光（FL）猝灭主要源于 Fe（由氧化 ILH/离子化 AFC 得到）与 PSS-DPA-AgNCs 之间的动态猝灭过程。AgNCs 的 FL 猝灭程度与 ILH/AFC 的浓度在 0.17-6.00/0.067-3.33 μmol·L 范围内存在良好的线性关系，相应的检测限（3σ/slope）为 12.4/6.04 nmol·L。此外，将 AgNCs 探针扩展到片剂、固体饮料或 ILH 添加剂中 ILH 的测定以及两种食用盐或糖浆中 AFC 的测定，与标准的 1,10-菲啰啉法相比，结果令人满意。此外，AgNCs 探针还表现出良好的温度传感能力。
