Fig. 5. (a) The isothermal titration calorimetry (ITC) data for sequential injections (10 μL per injection) of Br^– solution (5 mM) into Tet-1 solution (0.125 mM). (b) The apparent reaction heat obtained from the integration of calorimetric traces. (c) The fluorescence of DSA ⊂ Tet-1 species with the addition of 10 equiv. of different template ions (PF₆^–, Br^– and I^–, cyan column) followed by titration of 20 equiv. of AgCF₃SO₃ (red column) to the aforementioned solution (F₀ corresponds to the fluorescence of DSA ⊂ Tet-1). (d) The reversible Br^–/Ag⁺ controlled uptake and release of DSA monitored by fluorescence.