Toshiki Aoki
Niigata University
Japan
Title: Application of the Products by Highly Selective Photocyclicaromatization of cis-cisoidal poly(substituted phenylacetylene)
Biography
Biography: Toshiki Aoki
Abstract
We have already reported a petit top-down preparation method for self-supporting su-pramolecular polymeric membranes1) by a novel highly selective photocyclicaromatization (SCAT), althoguh supramolecular polymeric materials are usually prepared by bottom-up methods. The SCAT reaction converted π-conjugated polymers from phenylacetylene having two hydroxyl groups to exclusively yield a 1,3,5-trisubstituted benzene derivative whose structures were confirmed by H-NMR, GPC, and TOF-MS. The SCAT reaction had many unique characteristics, such as unusual selectivities, as follows. 1) a quantitative reaction: it gave only the corresponding cyclic trimer, i.e., a 1,3,5-trisubstituted benzene derivative. 2) an intramolecular reaction, 3) a stereospecific and template reaction, 4) a photoreaction, 5) a solid state reaction. In addition, 6) the resulting cyclic trimers had the ability to form a self-supporting membrane, in spite of their low molecular weights.
Since SCAT has such high selectivities and is useful for the preparation of a self-supporting supramolecular polymer membrane, many kinds of applications can be expected. In this lecture, some applications of the unique reaction products will be presented based on the advantages above mentioned. For example, 1) analysis of the microstructures of the starting polymers, 2) examination of gas permeation through the supramolecular polymers, 3) synthesis of new types of multistranded polymers, and 4) exfoliation of two dimensional network polymers.