Ratiometric discrimination of Th4+ ions by a fluorogenic quinoline appended phenanthridine sensor and its applications

A new phenanthridine appended quinoline-based chemoreceptor 5-(5-(quinolin-8-yl)thiophen-2-yl)-tetrahydrodibenzo[a,i]phenanthridine (PHQBA) was successfully synthesized and characterized by 1 H, 13 C, and HRMS spectral analyses.