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  • Title: 1H NMR spectral studies on the polymerization mechanism of indole and its derivatives.
    Author: Xu J, Hou J, Zhou W, Nie G, Pu S, Zhang S.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2006 Mar 01; 63(3):723-8. PubMed ID: 16157507.
    Abstract:
    The existence of NH bond according to the hydrogen nuclear magnetic resonance ((1)H NMR) spectra of polyindole and its derivatives, such as poly(5-bromoindole), poly(5-cyanoindole), poly(5-nitroindole), poly(5-methylindole), proved polymerization of high-quality polyindoles, which were electrosynthesized from middle strong Lewis acid boron trifluoride diethyl etherate (BFEE) and its mixed electrolytes with additional diethyl ether, occurred at 2,3-position. The elongation of the conjugation length made the chemical shift of all the protons of polyindoles to lower field in comparison with those of monomers.
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