{'fraction_non_alphanumeric': 0.031936127744510975, 'fraction_numerical': 0.008982035928143712, 'mean_word_length': 5.42948717948718, '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 solution properties of a meta-linked anionic poly(phenylene ethynylene) conjugated polyelectrolyte

Abstract A meta-linked anionic conjugated polyelectrolyte m-PPYPE-SO3Na was synthesized and characterized by UV-vis, FT-IR, and photoluminescence spectroscopy. It is brown solid readily soluble in water and methanol. The UV-vis absorption spectra of the polymer show strong absorption bands, which correspond to the π-π* transition of π-conjugated segments. Fluorescence spectra in different solvents show that this kind of polymer has solvent-dependency. It was found that the existence of polymer-type surfactant significantly increased the intensity of fluorescence of the polymer. The fluorescence of the polymer in water solution could be effectively quenched by methyl viologen. Linear fit of the quenching plots affords Stern-Volmer constants (Ksv) of 5.65×105M-1 for intrinsic fluorescence emission of the polymer m-PPYPE-SO3Na and this revealed its good fluorescence sensitivity.