*4.3. Preparation of Fluorescent Glutathione Responsive* β*-cyclodextrin-Based Nanosponges*

Fluorescent GSH-responsive nanosponges were obtained by adding 6-coumarin (0.1 mg/mL) to the aforementioned aqueous GSH-NS nanosuspensions (previously described) (10 mg/mL) under stirring for 24 h at room temperature in the dark.
