| Autor: |
Rizzuto FJ; School of Chemistry, The University of Sydney, NSW 2006, Australia. deanna.dalessandro@sydney.edu.au., Hua C, Chan B, Faust TB, Rawal A, Leong CF, Hook JM, Kepert CJ, D'Alessandro DM |
| Jazyk: |
angličtina |
| Zdroj: |
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2015 May 07; Vol. 17 (17), pp. 11252-9. |
| DOI: |
10.1039/c5cp00081e |
| Abstrakt: |
Two organic polymers containing alternating electron donating triarylamine and electron accepting thiazolo[5,4-d]thiazole (TzTz) moieties have been synthesized and their redox states investigated. When donor and acceptor units are proximal (polymer )1, electron density is delocalized, leading to a small electrical and optical band gap; these are larger with the inclusion of an adjoining alkynyl-phenyl bridge (polymer 2), where electron density is more localized due to the rotation of the monomer units. As a result, 1 and 2 display different optical and fluorescence properties in their neutral states. Upon chemical and electrochemical redox reactions, radicals form in both 1 and 2, yielding magnetic materials that display temperature-independent paramagnetism, attributable to delocalization of radical spins along the polymeric backbones. The ability to convert between diamagnetic and paramagnetic states upon chemical oxidation and/or reduction allows for the materials to display switchable magnetism and fluorescence, imparting multifunctionality to these solid-state purely organic materials. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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