Photostability of water-soluble inclusion complexes of UV-filters and
curcumin with gamma-cyclodextrin polymer
Thitinun Karpkird*, Raweewan Khunsakorn, Chaiwat Noptheeranuphap and Junya
Jettanasen
Department of Chemistry, Faculty of Science, Kasetsart University
Ngamwongwan Rd, Chatuchak, Bangkok Thailand 10900
Supplementary Materials
1. Gel permeation chromatography (GPC).
2. UV absorption of pure DBM, EHMC and curcumin in ethylene glycol.
3. Effect of addition of pyCD on DBM, EHMC and curcumin UV-Vis absorption.
4. Effect of oxygen on the photostability of DBM-pyCD in water.
1. Gel permeation chromatography (GPC).
Fig. S1. GPC chromatogram of pyCD.
2. UV absorption of pure DBM, EHMC and curcumin in ethylene glycol.
Fig. S2 absorption spectra of (up) 0.01 mM (a) EHMC, (b) DBM and (c) curcumin in
ethylene glycol and (down) 1 mg/mL of (a) EHMC-pyCD, (b) DBM-pyCD and (c)
curcumin-pyCD in water.
3. Effect of addition of pyCD on DBM, EHMC and curcumin UV-Vis absorption
,
Fig. S3. UV-Vis absorption of (a) EHMC, (b) DBM and (c) curcumin in water upon
titration with pyCD.
4. Effect of oxygen on the photostability of DBM-pyCD in water.
The solution of DBM-pyCD 4 mg/mL was prepared in DI water. The DBMpyCD solution was transferred into two quart cuvettes with septum. One cuvette was
purge by nitrogen for 15 min. Two solutions were irradiated by UVA lamp. The UVVis absorption of DBM-pyCD in two cuvettes was measured after irradiation for 5,
15, 30 and 60 min.
Fig. S4. UV-Vis absorption spectra of DBM-pyCD in DI water (a) in the presence of oxygen
and (b) under nitrogen atmosphere. (c) Percent photostability of DBM-pyCD in DI water in
the present of oxygen () and under nitrogen atmosphere ().