Electro-optical properties of poly(2-ethynyl-N-hexylpyridinium bromide) and poly(2-ethynyl-N-hexylpyridinium iodide)

Synthesis and properties of an ionic polyacetylene with norbornene moieties

“…The quaternization of the nitrogen atom of pyridine changes the nature of the substituent from electron-donating to the electron-withdrawing [40]. The polymerization of 2-ethynylpyridine by using compounds such as trifluoromethanesulfonate [40], propargyl bromide [24], methyl iodide [41], and 1-bromohexane [42] had been known to proceed even at mild reaction conditions of low temperature (below 50 8C). The activated acetylenic triple bond of N-substituted-2-ethynylpyridinium halide was known to be susceptible to the linear polymerization under mild reaction conditions [23,27,43].…”

Spontaneous polymerization of 2-ethynylpyridine with acylated multi-walled carbon nanotubes in supercritical carbon dioxide and their optical and electrochemical performance

“…The resulting polymers have a conjugated backbone, high electrical conductivity, high solubility and excellent stability in air for a long period of time. As a unique member of polyactylene derivatives, poly (2-ethynylpyridine) (P2EP) has been widely studied due to its unique properties [9,10]. It has been previously reported that quaternization of pyridine nitrogen in 2-ethynylpyridine (2-EPy) using alkyl halides in polar solvents led to the spontaneous polymerization of the monomer, resulting in P2EP salts of high molecular weight [11].…”

Electro-optical properties of poly(2-ethynyl-N-propargylpyridinium compound) with different counter ions

“…The polymers having a conjugated backbone are expected to show unique properties such as electrical conductivity, paramagnetism, migration and transfer of energy, color, and chemical reactivity and complex formation ability [9]. Because of these properties, polyacetylene and its homologues have been promising as organic semiconductors [20,21], as membranes for gas separation and for liquid-mixture separation [13], as chiro-optical materials [22,23], as side-chain liquid crystals [10,24,25], as materials for chemical sensors [26], and as materials for nonlinear optical property [27][28][29] and for photoluminescence and electroluminescence properties [30][31][32][33][34][35][36][37][38].…”