Self-Assembling Depsipeptide Dendrimers and Dendritic Fullerenes with New cis- and trans-Symmetric Hamilton Receptor Functionalized Zn-Porphyrins: Synthesis, Photophysical Properties and Cooperativity Phenomena
作者:Katja Maurer、Bruno Grimm、Florian Wessendorf、Kristine Hartnagel、Dirk M. Guldi、Andreas Hirsch
DOI:10.1002/ejoc.201000233
日期:2010.9
Two novel supramolecular building blocks, namely cis- and trans-symmetric zinc-porphyrins bearing Hamilton receptors as their focal points (10 and 15), were self-assembled with (i) first-, second- and third-generation depsipeptide cyanurates (21-23); (ii) second-generation dendrofullerene (24), and (iii) cyanuric acid substituted fullerene (20), and probed in a series of photophysical investigations
两种新型超分子结构单元,即以汉密尔顿受体为焦点的顺式和反式对称锌卟啉(10 和 15),与(i)第一代、第二代和第三代缩肽氰尿酸盐(21 -23); (ii) 第二代树枝状富勒烯 (24) 和 (iii) 氰尿酸取代的富勒烯 (20),并在一系列光物理研究中进行了探测。重要的是,结合常数 K n 和希尔系数 n H 证实了总体 1:2 化学计量比,表明显着的协同性。作为一般特征,更强的结合从反式对称卟啉异构体演化而来,尽管缩肽配体的空间需求增加意味着结合常数随着每一代而降低。