Building conjugated polymers

The versatility of poly(phenylcne) chemistry can also be seen in that it constitutes a platform for the design of other conjugated polymers with aromatic building blocks. Thus, one can proceed from 1,4- to 1,3-, and 1,2-phenylene compounds, and the benzene block can also be replaced by other aromatic cores such as naphthalene or anthracene, helerocyclcs such as thiophene or pyridine as well as by their substituted or bridged derivatives. Conceptually, poly(pheny ene)s can also be regarded as the parent structure of a series of related polymers which arc obtained not by linking the phenylene units directly, but by incorporation of other conjugated, e.g. olefinic or acetylenic, moieties. 

C. Xu, H. Yamada, A. Wakamiya, S. Yamaguchi, and K. Tamao, Ladder bis-silicon-bridged stilbenes as a new building unit for fluorescent Tr-conjugated polymers, Macromolecules, 37 8978-8983, 2004. 

EDOS, 89), a novel building block for electron-rich -conjugated polymers, is based on condensation of diethyl selenodiglycolate (87) with diethyl oxalate to tet-rasubstituted thiophene (88) followed by modification of the hydroxy substituents and decarboxylation [128]. 

A further study of the symmetry aspects of the superlattices of columnar structures in doped conjugated polymers (commonly referred to as channel structures in polyacetylene studies) has been presented by Heiney et al. [115]. The authors discuss the effects of broken symmetries of either the 2D-projected lattice or the columnar building blocks (called motifs ... 

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