Chen Shuoran, Chen Fuming, Han Pengju, Ye Changqing, Huang Suqin, Xu Lei, Wang Xiaomei, Song Yanlin
Research Centre for Green Printing Nanophotonic Materials, Jiangsu Key Laboratory for Environmental Functional Materials, Institute of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology Suzhou 215009 P. R. China
Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 P. R. China.
RSC Adv. 2019 Nov 8;9(62):36410-36415. doi: 10.1039/c9ra06524e. eCollection 2019 Nov 4.
A ratiometric fluorescent sensor for the detection of Fe ions is achieved based on triplet-triplet annihilation upconversion (TTA-UC) luminescence. A new anthracene derivative (named as DHTPA) is designed and synthesized and reveals similar optical properties to 9,10-diphenylanthracene (DPA) and is used as a stimuli responsive annihilator in a TTA-UC system due to its complexation ability. As a result, the UC emission can be significantly quenched by Fe ions, while the phosphorescence (PL) emission of sensitizer palladium(ii) octaetylporphyrin (PdOEP) remains nearly constant, which makes the PL signal an appropriate internal reference for the UC signal. The UC and ratio signals ( / ) both reveal a good linear relationship with Fe ion concentration, which for the first time makes the TTA-UC system a perfect ratiometric sensor for Fe ion detection. This sensing method will open a novel avenue to achieve ratiometric sensors in chemical and biological fields.
基于三重态-三重态湮灭上转换（TTA-UC）发光实现了一种用于检测铁离子的比率荧光传感器。设计并合成了一种新型蒽衍生物（命名为DHTPA），它显示出与9,10-二苯基蒽（DPA）相似的光学性质，并且由于其络合能力而被用作TTA-UC系统中的刺激响应湮灭剂。结果，铁离子可显著淬灭上转换发射，而敏化剂钯（II）八乙基卟啉（PdOEP）的磷光（PL）发射几乎保持不变，这使得PL信号成为上转换信号的合适内部参考。上转换和比率信号（/）均与铁离子浓度呈现良好的线性关系，这首次使TTA-UC系统成为用于铁离子检测的完美比率传感器。这种传感方法将为在化学和生物领域实现比率传感器开辟一条新途径。
