Influence of the Grafting Density on the Self-Assembly in Poly(phenyleneethynylene)-g-poly(3-hexylthiophene) Graft Copolymers
摘要:
Conjugated graft copolymers consisting of a chiral poly(phenyleneethynylene) (PPE) backbone and poly(3-hexylthiophene) side chains (P3HT) with different grafting degrees were synthesized. While PPE was prepared by classical Sonogashira couplings, the end-functionalized P3HT was prepared by a controlled Kumada catalyst transfer poly-condensation (KCTP) allowing the installation of an acetylene end group. After some postpolymerization reactions on the PPE to introduce azide groups, the P3HT was clicked to the PPE through the CuAAC coupling reaction. Subsequently, the (chiral) self-assembly of these materials was studied by means of UV vis and CD spectroscopy, AFM, and DSC. Finally, fluorescence spectroscopy is used to study the quenching of the PPE fluorescence by P3HT.
Cyclophane-type macrocyclic compounds from 21 to 56 members having two fused dihydrofuran rings were synthesized by the manganese(III)-mediated oxidation of terminal dienes with bis(3-oxobutanoate)s containing aromatics. The reaction detail, characterization and reaction pathways are described.
METHOD OF PRODUCING SOLUTION COMPOSITION CONTAINING MONOETHERIFIED PRODUCT, SOLUTION COMPOSITION, AND METHOD OF PRODUCING POLYMERIZABLE COMPOUND
申请人:ZEON CORPORATION
公开号:US20190077738A1
公开(公告)日:2019-03-14
Provided is a method of efficiently producing a solution composition containing a monoetherified product (III) using a hydroquinone compound (I) and a hydroxyl group-containing etherifying agent (II). The method of producing a solution composition includes: a step (1) of reacting a hydroquinone compound (I) and a hydroxyl group-containing etherifying agent (II) in a two-phase system including an alkaline aqueous solution and a hydrophobic ether solvent, and in the absence of a phase transfer catalyst and a hydrophilic organic solvent; and a step (2) of separating and removing an aqueous phase of a two-phase reaction liquid by liquid separation, and washing an organic phase using an aqueous solution containing a neutral inorganic salt and a hydroxide of an alkali metal, or the like.
The title polymers, which were composed of π-conjugated pyrroles and dialkoxybenzene crosslinkers, were prepared by electrochemical polymerization to afford uniform thin films. These films were characterized by cyclic voltammetry (CV), scanning electron microscope (SEM), and redox stability.