Cholesterol-Armed Cyclens for Helical Metal Complexes Offering Chiral Self-Aggregation and Sensing of Amino Acid Anions in Aqueous Solutions
作者:Satoshi Shinoda、Tsuyoshi Okazaki、Tomoko N. Player、Hitomi Misaki、Kenzi Hori、Hiroshi Tsukube
DOI:10.1021/jo0478297
日期:2005.3.1
and Y3+ complexes in which four chiral cholesterol-functionalized sidearms were bundled and asymmetrically twisted above cyclen−metal complex platforms. Since the resulting helical metal complexes included chiral, hydrophobic cholesterol residues and charged, hydrophilic metal sites as well as asymmetric coordination geometries, they exhibited unique amphiphilic properties and provided chiral self-aggregates
胆固醇武装的Cyclenns作为Na +,Ca 2+和Y 3+络合物的八齿受体,其中四个手性胆固醇官能化的侧臂被捆绑在一起,并在cycln-金属络合物平台上不对称地扭曲。由于所得的螺旋金属络合物包含手性,疏水性胆固醇残基和带电的亲水性金属位点以及不对称配位几何形状,因此它们表现出独特的两亲性质,并在水溶液中具有手性自聚集体。光散射,荧光和TEM表征表明Na +配合物与胆固醇武装的细胞周期蛋白可以在水溶液中产生特别稳定的自聚集,并提供了超分子环境,可有效地感测和检测氨基酸阴离子。各种dansylamino酸衍生物(丹磺酰= 5-(二甲基氨基)-1-萘磺酰)被很好地容纳在helicate聚集体以得到高度增强的荧光信号,这可以通过肉眼在10被检测到- 7摩尔/升水平。通过Langmuir型方程分析了它们的包合行为,表明发生了对映异构体选择性包合。MM / MD计算和圆二色性(CD)研究进一步表明