{'fraction_non_alphanumeric': 0.03977272727272727, 'fraction_numerical': 0.019318181818181818, 'mean_word_length': 5.674242424242424, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Synthesis and Characterization of Poly[N-(2-ethyl pyrroyl)-2-ethynylpyridinium Bromide]

A monosubstituted polyacetylene having two aromatic heterocycles (pyridine and pyrrole) was easily prepared via the uncatalyzed polymerization of 2-ethynylpyridine using 1-(2-bromoethyl)pyrrole. The polymerization proceeded well in homogeneous manner to give a moderate yield of polymer (70%). The chemical structure of resulting polymer was characterized by such instrumental methods as IR, NMR, and UV-visible spectroscopies to have the conjugated backbone system with the designed N-(2-ethylpyrroyl)pyridinium bromide. The absorption spectrum starts around 800 nm, which is due to the π→ π* interband transition of conjugated polymer system. The photoluminescence spectra of polymer showed that the photoluminescence peak is located at 574 nm, corresponding to a photon energy of 2.16 eV.