Download or read book Synthesis and Self-assembly of Star-shape Giant Molecules Based on Hydrophilic Polyhedral Oligomeric Silsesquioxane (POSS) written by Gaoyan Mu and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemical and physical properties of materials are determined not only by composition but also hierarchical structures. Hierarchical structures are formed by "bottom up" method, self-assembly of nano-scale building blocks into supramolecular assemblies via secondary interactions.1 In recent years, a series of functionalized POSS were utilized as "nanoatoms" to synthesize well-defined giant molecules. As a kind of giant molecules, giant surfactants are focused in my work. To investigate the fundamental principles of self-assembly, the giant surfactants with precise molecular structures have been synthesized by clicking "nanoatoms" to flexible polymer tails with controlled molecular weight. Because the self-assemblies of giant surfactants are sensitive to topological structures, a series of "giant surfactant" with multi-heads or multi-tails have been synthesized.2 In my work, the APOSS based star-shape giant molecules with or without polystyrene (PS) tails were precisely synthesized via "living" radical polymerization and "click chemistry". The chemical structure of the product was confirmed by 1H NMR spectrum, 13C NMR spectrum, GPC spectra, FT-IR spectra and MALDI-TOF mass spectra. After the self-assembly of samples in solution, the structures formed were investigated by transmission electron microscopy (TEM), static light scattering (SLS) and dynamic light scattering (DLS).