Thermal, optical, electrochemical properties and conductivity of trans- and cis-poly(1-ethynylpyrene): a comparative investigation
The thermal, optical and electrochemical properties of trans-poly(1-ethynylpyrene) ( trans-PEP) and cis-poly(1-ethynylpyrene) ( cis-PEP) have been studied as a function of polymer backbone configuration and internal stacking. Absorption spectra of the polymers showed that trans-PEP possesses a highe...
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Published in | Polymer (Guilford) Vol. 46; no. 13; pp. 4789 - 4798 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Elsevier Ltd
17.06.2005
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | The thermal, optical and electrochemical properties of
trans-poly(1-ethynylpyrene) (
trans-PEP) and
cis-poly(1-ethynylpyrene) (
cis-PEP) have been studied as a function of polymer backbone configuration and internal stacking. Absorption spectra of the polymers showed that
trans-PEP possesses a higher degree of conjugation than its homologue,
cis-PEP. Intramolecular interactions occur between adjacent pendant pyrene units (associated pyrenes) present in each polymer, giving rise to static excimer emissions, strongest in
cis-PEP because of the shorter distances between aromatic rings. Data resulting from excitation spectra and fluorescence decay profiles proved that such interactions take place in the ground state. Cyclic voltammetry of
trans- and
cis-PEP exhibited irreversible behaviors with different oxidation potentials as a result of their dissimilar geometry. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0032-3861 1873-2291 |
DOI: | 10.1016/j.polymer.2005.04.003 |