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Excitation transfer between conjugated polyelectrolytes and triplet emitter confined in protein nanowires
Linköping University. Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics .
2010 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Phosphorescent metal complexes can be incorporated into amyloid-like fibrils, and these fibrils can be decorated with conjugated polyelectrolytes (CPEs). In this study, fac-tris[2-phenylpyridinato-C2,N]irdium(III) complexes [Ir(piq)3] were used as the phosphorescence emitter and Sodium-poly(3-thiophene acetic acid) (PTAA-Na) compounds were used as CPEs. Herein we study the energy transfer processes between the iridium complexes and the CPEs. To investigate these mechanisms, the analysis of the emission quenching and time-resolved measurements were done. Our measurements show that energy can be transfered from singlet state of PTAA to the singlet state of Ir(piq)3. Moreover, incorporation of iridium into amyloid fibrils decreases the importance of energy transfer by the Dexter mechanism. Finally we propose a geometry of interaction to explain the obtained results.

Place, publisher, year, edition, pages
2010. , 37 p.
Keyword [en]
Singlet Triplet Förster Dexter Phosphorescent Amyloid PTAA Iridium
National Category
Organic Chemistry Dentistry
URN: urn:nbn:se:liu:diva-58567ISRN: LITH-IFM-A-EX--10/2321--SEOAI: diva2:343713
2010-06-01, Brilloun, Fysikhuset, 10:15 (English)
Physics, Chemistry, Mathematics
Available from: 2010-08-27 Created: 2010-08-15 Last updated: 2010-08-27Bibliographically approved

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Thinprakong, Chorpure
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Linköping UniversityBiomolecular and Organic Electronics
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