title: 1H NMR spectral studies on the polymerization mechanism of indole and its derivatives.
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.
authors.affiliation: Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China. xujingkun@mail.ipc.ac.cn
authors.forename: Jingkun
authors.initials: J
authors.lastname: Xu
authors.forename: Jian
authors.initials: J
authors.lastname: Hou
authors.forename: Weiqiang
authors.initials: W
authors.lastname: Zhou
authors.forename: Guangming
authors.initials: G
authors.lastname: Nie
authors.forename: Shouzhi
authors.initials: S
authors.lastname: Pu
authors.forename: Shusheng
authors.initials: S
authors.lastname: Zhang
mesh_terms: D001895:Boron / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods*; D006859:Hydrogen / Q000737:chemistry; D006860:Hydrogen Bonding; D007211:Indoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D008968:Molecular Conformation; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011522:Protons; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D007211:Indoles; D011108:Polymers; D011522:Protons; D006859:Hydrogen; C030374:indole; D009584:Nitrogen; D001895:Boron