Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
National Quality Supervision and Inspection Center for Incense Products (Fujian), Quanzhou, 362600, Fujian, China.
Mikrochim Acta. 2019 Dec 18;187(1):66. doi: 10.1007/s00604-019-4056-7.
Manganese(II)-doped zinc sulfide nanocrystals (Mn:ZnS NCs) with dual-emission fluorescence (peaks at 445 nm and 590 nm under 330 nm excitation), good water stability and low toxicity were synthesized by hot injection. The fluorescence intensity of both emission bands of the nanocrystals can change rapidly by the content of gaseous and dissolved oxygen. The process is fully reversible. Compared with the maximum intensity of Mn:ZnS sensing film in 100% nitrogen, the emission of the blue emission decreases by 72% in the presence of 100% oxygen, and the yellow emission by 32%. Response is linear in the presence of 3% to 12% of oxygen percentage in gas. For water-dissolved oxygen, the linear response occurs between 0.54 and 11.4 mg·L. Graphical abstractMn-doped ZnS NCs with dual-emission fluorescence were synthesized by hot-injection method. The reversible and rapid sensing characteristics of Mn-doped ZnS NCs to oxygen were studied, and the possible sensing mechanism was investigated.
通过热注射法合成了具有双发射荧光（在 330nm 激发下，峰值位于 445nm 和 590nm）、良好的水分稳定性和低毒性的锰（II）掺杂的硫化锌纳米晶体（Mn:ZnS NCs）。纳米晶体的两个发射带的荧光强度可以通过气态和溶解氧的含量快速变化。该过程是完全可逆的。与 100%氮气中 Mn:ZnS 传感膜的最大强度相比，在 100%氧气存在下，蓝色发射减少了 72%，黄色发射减少了 32%。在气体中存在 3%至 12%的氧气百分比时，响应呈线性。对于水中溶解的氧气，在 0.54 至 11.4mg·L 之间呈线性响应。
图摘要
通过热注射法合成了具有双发射荧光的 Mn 掺杂 ZnS NCs。研究了 Mn 掺杂 ZnS NCs 对氧气的可逆和快速传感特性，并探讨了可能的传感机制。
