A stimuli responsive triplet–triplet annihilation upconversion system and its application as a ratiometric sensor for Fe3+ ions. Issue 62 (8th November 2019)

• Record Type: Journal Article
• Authors: Chen, Shuoran; Chen, Fuming; Han, Pengju; Ye, Changqing; Huang, Suqin; Xu, Lei; Wang, Xiaomei; Song, Yanlin
• Is Part Of: RSC advances. Volume 9:Issue 62(2019)
• Page Start: 36410
• Page End: 36415
• Publication Date: 2019-11-08
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra06524e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A ratiometric fluorescent sensor for detection of Fe 3+ is achieved based on a triplet–triplet annihilation upconversion (TTA-UC) system with a responsive annihilator. Abstract : A ratiometric fluorescent sensor for the detection of Fe 3+ 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 3+ 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 ( I UC / I PL ) both reveal a good linear relationship with Fe 3+ ion concentration, which for the first time makes the TTA-UC system a perfect ratiometric sensor for Fe 3+ ion detection. This sensing method will open a novel avenue to achieve ratiometric sensors in chemical and biological fields.