fullerenes of similar overall structure. Among the higher adducts, anionic derivatives have a higher antioxidant activity than comparable cationic compounds. To achieve sufficient water solubility without the aid of a surfactant or co-solvent at least three charges on the addends are required. Significantly, anionic in contrast to cationic fullerene adducts bind with high affinity to cytochrome C.
Synthesis and Orthogonal Functionalization of [60]Fullerene<i>e</i>,<i>e</i>,<i>e-</i>Trisadducts with Two Spherically Defined Addend Zones
作者:Florian Beuerle、Andreas Hirsch
DOI:10.1002/chem.200900329
日期:2009.7.27
of 13–15. As a consequence of the template‐directed synthesis, all e,e,e‐trisadducts were formed as in/out isomers exclusively and contain two spherically well‐definedaddendzones with equatorial and polar orientation, respectively. By variation of the outer malonate termini of the tethers, selective functionalization of the equatorial addendzone could be achieved, thus leading to fine‐tuning of intermolecular
e,e,e-三加合物13和15是通过三脚架丙二酸酯10和12与C 60的高度区域选择性三重环丙烷化反应制得的。产率和区域选择性取决于丙二单元连接到的焦点苯芯系绳的长度和结构13 - 15。模板定向合成的结果是,所有e,e,e三价合物都按进/出形式形成异构体,并且分别包含两个球形的定义明确的加合物区域,分别具有赤道和极性方向。通过改变系绳的外部丙二酸末端,可以实现赤道附加区的选择性功能化,从而导致分子间相互作用(如溶解度或聚集现象)的微调。在去除了14和15中的焦点苯部分后,可以实现极性附加区的选择性官能化。通过1 H NMR光谱分析可以观察到极性加成区中极性取代基的强大分子内氢键网络。通过两个加成区的正交官能化,富勒烯衍生物44 – 48可以作为一个单一的进/出异构体进行合成,从而大大增强了e,e,e- trisadducts作为超分子体系结构的基础。
Polymer brush on surface with tunable hydrophilicity using SAM formation of zwitterionic 4-vinylpyridine-based polymer
作者:P. Murugan、P. Ramar、Asit Baran Mandal、Debasis Samanta
DOI:10.1039/c7nj02971c
日期:——
A zwitterionic vinylpyridine-based polymeric SAM was assembled on different surfaces to obtain tunable hydrophilicity.