Fig. 5

Emission spectra of Zn-MOF-C-Tb with R/S-2-amino-1-butanol. a, b Zn-MOF-C-Tb dispersed in DMF upon incremental addition of R-2-amino-1-butanol and S-2-amino-1-butanol. c, d Fluorescence intensity changes of Zn-MOF-C-Tb at 544 nm and 344 nm. The solid lines are fitting results