Photochromic Properties of β-Cyclodextrin Dimer Linked by Dithienylethene
- Received Date: 2006-04-23
Abstract: A fi-cyclodextrin dimer tethered by photoswitchable dithienylethene moieties was synthesized as a potentially tunable receptor. The dimer exhibits pronounced photochromic properties. Irradiation of the dimer in open form with UV light at 254 nm resulted in immediate photocyclization to the pink closed form; the colorless open form could be regenerated by irradiation with visible light of wavelength >460 nm. The reaction kinetics of the forward photoprocess were also studied. To investigate the binding ability of the dimer in open and closed forms, a fluorescence titration was performed. It was found that the stability constant for the binding of TSPP (meso-tetrakis (4-sulfonatophenyl)porphyrin) by the closed form of the dimer is a factor of 5 higher than that of the open form.
|Citation:||Hui-yuan Hu, Zhi-ping Zhang, Xiang-ming Meng, Man-zhou Zhu, Qing-xiang Guo. Photochromic Properties of β-Cyclodextrin Dimer Linked by Dithienylethene[J]. Chinese Journal of Chemical Physics , 2007, 20(1): 103-108. doi: 10.1360/cjcp2007.20(1).103.6|