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Supramolecular Template-Controlled Synthesis of Well-defined Ladder Organic Polysioxane

Author: LvYinSheng
Tutor: WanYouZhi
School: Beijing University of Chemical Technology
Course: Applied Chemistry
Keywords: Supramolecular self-assembly Superstructure Organic bridging group trapezoidal polysiloxane
CLC: O634.41
Type: Master's thesis
Year: 2008
Downloads: 80
Quote: 0
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Trapezoidal ultra less structure \This article is designed to demonstrate modern characterization means that the monomer molecules in the course of the reaction force in the supramolecular synergistic effect self-assemble into ordered of high tacticity super structure ( LS ) ; synthesized by a regular trapezoid super structure control high tacticity organic bridging group polysiloxane (OLPS), lay the foundation for the further synthesis of real high tacticity of trapezoidal silsesquioxane . The main contents are as follows : 1. Designed and synthesized a monomer molecule M high Tacticity trapezoidal super structure ( LS ) self-assembled to form hydrogen bonds and π-π stacking synergy . Characterization methods 29 Si- NMR of XRD, VPO, fluorescence spectroscopy , and design a series of comparative experiments show that the monomer molecules in solution can self-assemble into the high Tacticity super structure , further Description the high tacticity super structure (LS) is a the synthetic organic bridging group polysiloxane (OLPS) key . Using the stepwise coupling of the regulation of the supramolecular template / polymerization method, synthesized for the first time a high molecular weight , high stereoregularity organic bridging group polymethylsiloxane (OLPS), respectively the use 29 Si -NMR, IR, XRD, VPO polymer characterization . Its 29 < / sup > Si - NMR spectrum representing the main chain Si0 2/ 2 unit peak baseline half peak width less than 0.3ppm , that Si atoms on the polymer main chain skeleton no branches in a very single environment and cross-linking . 3 . Using supramolecular templates regulation gradually coupling / polymerization method , synthesis of high molecular weight , high regularity of organic base trapezoidal poly phenyl siloxane bridge , through the XRD 29 Si -NMR IR, DSC its structural characterization , the 29 < / sup > Si - NMR spectrum representing the main chain Si0 2/ 2 unit peak baseline half peak width less than 0.3ppm , polymerization was no branching and cross-linking phenomenon .

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Elements of the organic polymer > Section IV group elements of organic polymers > Silicone polymer
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