Synthesis and Functionality of Substituted Polyacetylenes

Substituted Polyacetylenes: Synthesis, Properties, and Functions

“…Review articles and monographs are available for these functions. 4,6,[16][17][18][19][20] Some examples are detailed here for the polymers shown in Chart 2. Xu et al reported that a thin membrane fabricated from a poly(PA)/CdS hybrid (11 in Chart 2) by solution casting demonstrates excellent photoconductivity.…”

“…Though substituted polyacetylenes also possess alternating carboncarbon double bonds along the main chain, their properties are fairly different from those of polyacetylene. [4][5][6][16][17][18][19] For instance, many of the substituted polyacetylenes are organo-soluble, more or less stable in air, variously colored, and electrically semiconducting or insulating. When polymers from mono-and disubstituted acetylenes are compared to each other, disubstituted acetylene polymers are usually more stable in air, less conjugated, and more lightly colored and they have stiffer polymer chains than monosubstituted acetylene polymers.…”

“…In the areas of polymer design and synthesis, polymerization catalysts and novel monomers were investigated widely in the beginning, but recently the focus has shifted to more advanced areas including living polymerization, synthesis of helical polymers, incorporation of functional groups by either polymerization or polymer reactions, and construction of unique polymer structures such as polymer brushes and star polymers. [3][4][5][6][7][8][9][10][11][12][13][14][15] Substituted polyacetylenes belong to a category of conjugated polymers with stiff polymer chain, and hence studies of their properties and functions may lead to potential applications to organic optoelectronic and stimuli-responsive materials, [16][17][18][19][20][21][22] and further gas separation membranes. [23][24][25][26][27][28] 2.…”

Stimuli-Responsive Polyacetylenes and Dendronized Poly(phenylacetylene)s

“…On the other hand, substituted polyacetylenes (PAs) have been investigated with respect to various aspects such as precision synthesis, helical structures, and a variety of optoelectronic functions on the basis of their features as typical conjugated polymers. [5][6][7][8][9] Especially, poly(phenylacetylene)s (PPAs) have been studied in detail taking advantage of its generality and usefulness. Motivated by helical biomacromolecules, artificial helical polymers have also made remarkable progress during the last few decades.…”

Poly(phenylacetylene) Amines: A General Route to Water-Soluble Helical Polyamines

“…[38][39][40][41] The main problem is that the typical Rh(I) catalyst gets poisoned in the presence of polar groups such as primary amines. [42][43][44]49 A protection/deprotection approach has been used [48][49] but in addition to the obvious increase in the number of synthetic steps, it is not easy to find experimental conditions for the total disappearance of the protecting groups without affecting the integrity of the polymer. Tang and coworkers gave a step forward to surpass this problem by using [Rh(nbd)Cl]2, [Rh(cod)Cl]2 and Rh + (nbd)-[C6H5B -(C6H5)3] as catalyst to polymerize phenylacetylenes (PAs) bearing carboxylic acid or alcohol groups.…”