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Excitation transfer between conjugated polyelectrolytes and triplet emitter confined in protein nanowires
Linköpings universitet. Linköpings universitet, Institutionen för fysik, kemi och biologi, Biomolekylär och Organisk Elektronik.
2010 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
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.

sted, utgiver, år, opplag, sider
2010. , s. 37
Emneord [en]
Singlet Triplet Förster Dexter Phosphorescent Amyloid PTAA Iridium
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-58567ISRN: LITH-IFM-A-EX--10/2321--SEOAI: oai:DiVA.org:liu-58567DiVA, id: diva2:343713
Presentation
2010-06-01, Brilloun, Fysikhuset, 10:15 (engelsk)
Uppsök
Physics, Chemistry, Mathematics
Veileder
Examiner
Tilgjengelig fra: 2010-08-27 Laget: 2010-08-15 Sist oppdatert: 2010-08-27bibliografisk kontrollert

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