Synthesis and Optical Properties of 6-Substituted-β-cyclodextrin Derivatives
作者:Ruiyun Guo、Mahuya Bagui、Yongge Wei、Zhonghua Peng
DOI:10.2174/157017809790442899
日期:2009.12.1
β-Cyclodextrin derivatives with varying lengths of π-conjugated arms have been synthesized. Their structures have been confirmed by 1H NMR, elemental analysis, mass spectrometry and X-ray crystal structure determination. Their self-inclusion properties are evaluated using Circular Dichroism, 1D and 2D 1H NMR measurements. It is found that, when the length of the π-conjugated arm is extended from 4 to 5 and to 6, the self-inclusion of the π-conjugated arm to the CD ring is enhanced. The effect of the self-inclusion on the optical properties of the CD-linked π-conjugated systems has been explored. Stronger inclusion leads to enhanced excitation-energy transfer.
我们合成了具有不同长度π-共轭臂的β-环糊精衍生物。它们的结构已通过 1H NMR、元素分析、质谱分析和 X 射线晶体结构测定得到证实。利用圆二色性、一维和二维 1H NMR 测量评估了它们的自包容特性。研究发现,当π-共轭臂的长度从 4 延长到 5 或 6 时,π-共轭臂对 CD 环的自包容作用增强。我们探讨了自包容对 CD 连接的 π 共轭体系的光学特性的影响。更强的自包容会增强激发-能量转移。