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Photochromic Properties of β-Cyclodextrin Dimer Linked by Dithienylethene
Hui-yuan Hu ,Zhi-ping Zhang ,Xiang-ming Meng ,Man-zhou Zhu* ,Qing-xiang Guo*
Author NameAffiliation
Hui-yuan Hu Department of Chemistry, University of Science and Technology of China, Hefei 230026, China 
Zhi-ping Zhang Department of Chemistry, University of Science and Technology of China, Hefei 230026, China 
Xiang-ming Meng Department of Chemistry, University of Science and Technology of China, Hefei 230026, China 
Man-zhou Zhu* Department of Chemistry, University of Science and Technology of China, Hefei 230026, China 
Qing-xiang Guo* Department of Chemistry, University of Science and Technology of China, Hefei 230026, China 
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.
Key words:  β-cyclodextrin dimer, Photochromic properties, Fluorescence spectroscopy
FundProject:
二噻吩乙烯桥连-环糊精二聚体光致变色性质
胡惠媛,张志平,孟祥明,朱满洲*,郭庆祥*
摘要:
合成了以可光控的二噻吩乙烯分子为桥连单元的β-环糊精二聚体作为潜在的可调受体化合物.该化合物显示了显著的光致变色特性,即以254 nm的紫外光照射,开环体会立即发生光环化反应生成粉红色的闭环体;而有色的闭环体用大于460 nm的可见光照射后又会发生开环反应.同时还研究了正向光环化反应的反应动力学.此外,还以四苯磺基卟啉(TSPP)为客体化合物进行了荧光滴定,研究开/闭环体之间包合能力的差异,发现闭环体对TSPP的包合稳定常数是开环体的5倍.
关键词:  β-环糊精二聚体,光致变色,荧光谱图
DOI:10.1360/cjcp2007.20(1).103.6
分类号: