有机硒桥联环糊精对染料分子的尺寸和形状识别  

Size and Shape Recognition of Dye Molecules by Organoselenium-bridged Bis(β-cyclodextrin)s

作　　者：陈湧[1] 李莉[1] 刘育[1] 

机构地区：[1]南开大学化学学院,天津300071

出　　处：《高等学校化学学报》2002年第6期1091-1093,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 9972 0 2 9;2 9992 5 90 -8)资助

摘　　要：The inclusion complexation behavior of 6,6′ trimethylenediseleno bridged bis(β cyclodextrin)(1) and 6,6′ ( o phenylenediseleno) bridged bis( β cyclodextrin)(2) with dye molecules was investigated by means of fluorescence and ultraviolet spectrometric titrations at 25℃ in phosphate buffer solution( pH 7.20 ). The results obtained indicated that bis( β cyclodextrin)s could not only significantly enhance the original binding ability of parent β cyclodextrin, but also be used to recognize the structural difference of guest molecules through the cooperative binding of the closely located two cyclodextrin cavities. This phenomenon was discussed from the viewpoint of size fit concept and multiple recognition mechanism between the host and guest.The inclusion complexation behavior of 6,6′ trimethylenediseleno bridged bis(β cyclodextrin)(1) and 6,6′ ( o phenylenediseleno) bridged bis( β cyclodextrin)(2) with dye molecules was investigated by means of fluorescence and ultraviolet spectrometric titrations at 25℃ in phosphate buffer solution( pH 7.20 ). The results obtained indicated that bis( β cyclodextrin)s could not only significantly enhance the original binding ability of parent β cyclodextrin, but also be used to recognize the structural difference of guest molecules through the cooperative binding of the closely located two cyclodextrin cavities. This phenomenon was discussed from the viewpoint of size fit concept and multiple recognition mechanism between the host and guest.

关 键 词：有机硒 染料分子 尺寸 形状 桥联环糊精 超分子配合物 协同键合 多重识别 

分 类 号：O641.3[理学—物理化学] TQ610.1[理学—化学]