Abstract
We report the synthesis and characterization of a series of cyclopentadithiophene polymers containing thiophene, selenophene, and tellurophene as comonomers. The effect of the chalcogen atom has been studied by a range of techniques, including thermal, optical, electrochemical, and computational. The results showed that by increasing the size of the chalcogen atom, the optical band gap is reduced mainly due to a downshift in the LUMO energy level. In addition, the larger size also increases the intermolecular heteroatom-heteroatom interactions facilitating the formation of polymer aggregates. This led to not only a stronger red-shifted band in the UV-vis absorption spectrum as well as raise in the HOMO energy level but also a potential solubility issue for higher molecular weight polymers containing particularly tellurophene units.
Original language | English (US) |
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Pages (from-to) | 5889-5894 |
Number of pages | 6 |
Journal | Macromolecules |
Volume | 47 |
Issue number | 17 |
DOIs | |
State | Published - Sep 9 2014 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© Published 2014 by the American Chemical Society.
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry