Fig. 4

Recycling experiment and stability tests. The quenching ability of Zn-MOF-C-Tb dispersed in DMF in the presence of a Cinchonine and b Cinchonidine with six cycles (the green and blue bars represent the initial luminescence intensity and the intensity with 1 mmol L⁻¹ analytes, respectively) at 544 nm. Numbers above the bars are the ratio of quantitative quenching