103.POM–Organic–POSS Cocluster: Creating A Dumbbell-Shaped Hybrid Molecule for Programming Hierarchical Supramolecular Nanostructures
writer：Min-Biao Hu, Zhan-Yao Hou, Wei-Qiong Hao, Yu Xiao, Wei Yu, Chi Ma, Li-Jun Ren, Ping Zheng, Wei Wang
keywords：Polyoxometalate， POSS， microphase separation
source：期刊
specific source：Langmuir, 2013, 29 (19), 5714–5722
Issue time：2013年
We report the construction of dumbbell-shaped hybrid molecules for programming their hierarchical supramolecular nanostructures through a synergetic self-assembly. Our first dumbbell-shaped hybrid molecule is a POM−organic−POSS
cocluster produced by covalently coupling a POM cluster and a POSS cluster together through an organic tether. Structural analyses demonstrated a highly ordered lamellar morphology with a 4.9 nm periodicity, indicating a strong thermodynamic force driving a nanoscale phase separation of the POM and POSS blocks. The POM clusters were arranged in an orderly fashion within the POM-containing layer with a 1.38 nm periodicity because of fixed shape and size of the cluster. This investigation provides in-depth understanding of how to construct hierarchical supramolecular nanostructures at a nanoscale less than 5 nm by manipulating and controlling the topological shape of hybrid molecules.