Figure 3 (a) 1H NMR spectra of EDTA-CDs and UPy-CDs (solvent: CD3OD). (b) Thermogravimetric analysis differential curves of EDTA-CDs, UPy-NCO, UPy-CDs and the physical mixture of UPy-NCO and EDTA-CDs (heating rate : 5 oC min -1 under N2 atmosphere. (c) FT-IR spectra of EDTA-CDs, UPy-NCO, UPy-CDs. (d) UPy-CDs of FT-IR under differential temperature.