Abstract
Poly(ortho-phenylene ethynylene)s (PoPEs) have been synthesized via an in situ activation/coupling AB′ polycondensation protocol. The resulting polymers have been characterized by several analytical methods and are shown to have no structural defects. Although the Sonogashira-Hagihara polycondensation reaction is less efficient than for the preparation of the corresponding meta- and para-linked polymers, presumably because of steric hindrance caused by the ortho substituents, the process can be accelerated by the use of microwave irradiation. Optical spectroscopy indicates solvent-dependent conformational changes between extended transoid and helical cisoid conformations, providing the first experimental evidence for solvophobically driven folding of the PoPE backbone.
Original language | English |
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Pages (from-to) | 1619-1627 |
Number of pages | 9 |
Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
Volume | 44 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2006 Mar 1 |
Externally published | Yes |
Keywords
- Conformational analysis
- Conjugated polymers
- Foldamers
- Microwave acceleration
- Poly(ortho-phenylene ethynylene)
- Polycondensation
ASJC Scopus subject areas
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry