Polypyrrole channel structure

We recently succeded in forming intrazeolite polyaniline (PANI), polypyrrole (PPy), polythiophene (PTh) and poly(3-methylthiophene) (P3MTh)l by oxidative polymerization inside the cavities of different zeolites, as demonstrated by vibrational, ESR, and electronic absorption data. It was observed that the dimensionality and pore size of the host determine the polymerization rates and intrazeolite products. This communication compares the above zeolite/polymer systems and discusses evidence for polymerization inside the host channel structures. 

It is relevant to re-examine data acquired using XPS, of the polypyrrole formed within the channels of copper mordenite. The Cls region [Fig. 4 (b)] contained a profile which could be deconvoluted into three peaks at 284.7, 286.9 and 289.1 eV. The main peak at 284.7 eV is ascribed to the a and P carbons of polypyrrole(56), and the feature at 289.1 eV to a "shake-up" peak due to the interband n-n transition (79). Finally the peak at 286.9 eV has been previously assigned to a "shake-up" structure caused by simultaneous electron excitation and transition from the valence band to a polaron level in the band gap (79). Since the "shake-up" process corresponds to a transition between an initially neutral state and a final ionized species the value obtained for the band gap using XPS would not... 

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