A Novel Approach Toward Low Optical Band Gap Polysquaraines
- 6 July 2001
- journal article
- letter
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 3 (16) , 2595-2598
- https://doi.org/10.1021/ol016284p
Abstract
Polycondensation of 2,5-dialkoxydivinylbenzene-bridged bispyrroles and squaric acid resulted in extensively conjugated polymers with strong near-infrared (NIR) absorption around 800−1000 nm, which is a signature of their low band gap (Eg). Conjugated polymers with such a strong NIR absorption are rare. One of the synthesized polysquaraines showed a significantly low Eg of 0.79 eV with an intrinsic conductivity of 5.3 × 10-4 S/cm.Keywords
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