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Bandgap of conjugated polymers

Reviews on polythiophenes, polysquarines, polybenzenes, etc. have appeared elsewhere, which also discuss the tunability of the bandgap of conjugated polymers [7]. Further sections of this chapter will focus on the synthesis and characterization of the underivatized thienothiophenes (a-c) and conjugated... [Pg.421]

Various synthetic approaches for engineering the bandgap of conjugated polymers have already been reviewed [13] and consequently will be briefly summarized here. As shown below the magnitude of the... [Pg.482]

Various molecular and solid-state quantum chemical methods have been used to predict the bandgaps of conjugated polymers [13-15]. Extrapolations based on oligomers provide an alternative way to calculate bandgaps. Here we will review the most recent papers on this topic. [Pg.366]

UV-vis spectroscopy has been established as a versatile and powerftil tool for the characterization of conjugated polymers. It is a tool that is used to quantitatively determine the extent of ir-orhital overlap in conjugated systems [120]. The extent of the conjugation is directly reflected in the maximum absorption for such systems. This is the manifestation of the tt-tt transition (HOMO/LUMO or bandgap). Consequently, UV-vis can be used to determine information regarding the conformational state and structure of conjugated polymers [120]. [Pg.384]

Roncali, J., et al. 1994. Control of the bandgap of conducting polymers by rigidification of the TT-conjugated system. J Chem Soc Chem Commun 2249. [Pg.479]

Schlick, U., F. Teichert, and M. Hanack. 1998. Electrochemical and spectroelectrochemical investigations of small-bandgap ir-conjugated polymers and their precursors. Synth Met 92 75. [Pg.479]

Blanchard, R, H. Brisset, B. Illien, A. Riou, and J. Roncali. 1997. Bridged dithienylethylenes as precursors of small bandgap electrogenerated conjugated polymers. / Org Chem 62 2401-2408. [Pg.537]

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See also in sourсe #XX -- [ Pg.28 ]



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Bandgap

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