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π‐Electron delocalization in conformationally distorted oligopyrroles and ploypyrrole
Author(s) -
Zerbi Giuseppe,
Veronelli Maurizio,
Martina Stefano,
Schlüter ArnulfDieter,
Wegner Gerhard
Publication year - 1994
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19940060510
Subject(s) - delocalized electron , polypyrrole , raman spectroscopy , electron delocalization , materials science , conjugated system , molecule , distortion (music) , solubility , chemical physics , crystallography , computational chemistry , polymer , chemistry , optics , physics , organic chemistry , optoelectronics , polymerization , amplifier , cmos , composite material
Effective conjugation coordinate (ECC) theory has previously been used to interpret the Raman spectra of oligopyrroles and polypyrrole, providing information on conjugation and delocalization. However, the materials used in real applications have long alkaline side chains (to aid solubility), which leads to conformational distortion. ECC theory is now applied to “pro‐tected” molecules, showing that a quantitative estimate of the extent of localization in conformationally distorted polypyrrole can be obtained from their Raman spectra.