A New Series of Fluorescent Indicators for Super Acids
I-Chih Shih, Yu-Shan Yeh, I-Che Wu, You-Hua Chen, Jiun-Yi Shen, Yi-An Chen, Mei-Lin Ho and Pi-Tai Chou
Article first published online: 6 SEP 2014 | DOI: 10.1111/php.12326
A new series of fluorescent indicators are developed for sensing super acids. The fluorescence intensity switches from the nonemissive state (the diprotonated form) to the intense emissive state (the triprotonated form) with pKa as low as −3.16. This super acid indicator with the highly emissive intensity, great chemical stability and excitation/emission wavelengths in the visible region may find potential applications in industry.