Synthesis of an ionic polyacetylene derivative via phosphorus oxychloride-activated polymerization of 2-ethynylpyridine

ABSTRACT

A new ionic polyacetylene was synthesized via the non-catalyst polymerization of 2-ethynylpyridine using phosphorus oxychloride. The polymerization proceeded well in homogeneous manner to give a moderate yield of polymer (74%). The resulting polymer was completely soluble in polar organic solvents including water. The photoluminescence spectrum showed the two maximum peaks of 471 nm and 489 nm corresponding to the photon energy of 2.64 eV and 2.54 eV, respectively. The oxidation and reduction onset potentials of polymer were observed at 970 and −130 mV, respectively.

KEYWORDS:

• Polyacetylene
• phosphorus oxychloride
• 2-ethynylpyridine
• non-catalyst polymerization
• cyclic voltammogram

Funding

This work was supported by the research fund of Kyungil University. This work was also supported by grant fund from the National Research Foundation (NRF) (2011–0028320) by the Ministry of Science, ICT & Future Planning (MSIP) of Korea. This work was supported by the research fund of Kyungil University. This work was also supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (MSIP) of Korea (NRF-2013M3C1A3065522).