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Direct observation of protein folding in nanoenvironments using a molecular ruler (2006)
Journal Article
Sarkar, R., Shaw, A., Narayanan, S., Dias, F., Monkman, A., & Pal, S. (2006). Direct observation of protein folding in nanoenvironments using a molecular ruler. Biophysical Chemistry, 123(1), 40-48. https://doi.org/10.1016/j.bpc.2006.04.006

We observe folding of horse heart cytochrome c in various environments including nano-compartments (micelles and reverse micelles). Using picosecond-resolved Förster resonance energy transfer (FRET) dynamics of an extrinsic covalently attached probe... Read More about Direct observation of protein folding in nanoenvironments using a molecular ruler.

Direct measurement of the singlet generation yield in polymer light-emitting diodes (2006)
Journal Article
Rothe, C., King, S., & Monkman, A. (2006). Direct measurement of the singlet generation yield in polymer light-emitting diodes. Physical Review Letters, 97(7), Article 076602. https://doi.org/10.1103/physrevlett.97.076602

In this study, the singlet and triplet exciton generation yields of a representative blue-emitting conjugated polymer are directly compared using simultaneous optical and electrical excitation measurements. After carefully accounting for bimolecular... Read More about Direct measurement of the singlet generation yield in polymer light-emitting diodes.

Solubilization of polyelectrolytic hairy-rod polyfluorene in aqueous solutions of nonionic surfactant (2006)
Journal Article
Knaapila, M., Almasy, L., Garamus, V., Pearson, C., Pradhan, S., Petty, M., …Monkman, A. (2006). Solubilization of polyelectrolytic hairy-rod polyfluorene in aqueous solutions of nonionic surfactant. Journal of Physical Chemistry B (Soft Condensed Matter and Biophysical Chemistry), 110(21), 10248-10257. https://doi.org/10.1021/jp0560563

We report on the solubilization, phase behavior, and self-organized colloidal structure of a ternary water-polyfluorene-surfactant (amphiphile) system comprised of polyelectrolytic poly {1,4-phenylene[9,9-bis(4-phenoxybutylsulfonate)] fluorene-2,7-di... Read More about Solubilization of polyelectrolytic hairy-rod polyfluorene in aqueous solutions of nonionic surfactant.

Long-range resonantly enhanced triplet formation in luminescent polymers doped with iridium complexes (2006)
Journal Article
Rothe, C., King, S., & Monkman, A. (2006). Long-range resonantly enhanced triplet formation in luminescent polymers doped with iridium complexes. Nature Materials, 5(6), 463-466. https://doi.org/10.1038/nmat1630

he current drive to produce cheap flexible plastic displays(1) has led to rapid improvements in device effciency. Inclusion of highly phosphorescent heavy-metal organic complexes as dopants ensures that both singlet and triplet excitations formed on... Read More about Long-range resonantly enhanced triplet formation in luminescent polymers doped with iridium complexes.

The use of substituted iridium complexes in doped polymer electrophosphorescent devices : The influence of triplet transfer and other factors on enhancing device performance. (2006)
Journal Article
King, S., Al-Attar, H., Evans, R., Congreve, A., Beeby, A., & Monkman, A. (2006). The use of substituted iridium complexes in doped polymer electrophosphorescent devices : The influence of triplet transfer and other factors on enhancing device performance. Advanced Functional Materials, 16(8), 1043-1050. https://doi.org/10.1002/adfm.200500881

The problem of phosphorescence quenching by the host polymer of a dopant in a polyfluorene-based electrophosphorescent device has been extensively studied. This paper concentrates on reduction of the rate of triplet-energy transfer from the dopant to... Read More about The use of substituted iridium complexes in doped polymer electrophosphorescent devices : The influence of triplet transfer and other factors on enhancing device performance..

Violation of the exponential-decay law at long times (2006)
Journal Article
Rothe, C., Hintschich, S., & Monkman, A. (2006). Violation of the exponential-decay law at long times. Physical Review Letters, 96(16), https://doi.org/10.1103/physrevlett.96.163601

First-principles quantum mechanical calculations show that the exponential-decay law for any metastable state is only an approximation and predict an asymptotically algebraic contribution to the decay for sufficiently long times. In this Letter, we m... Read More about Violation of the exponential-decay law at long times.

Absolute measurements of photoluminescence quantum yields of solutions using an integrating sphere (2006)
Journal Article
Porrès, L., Holland, A., -O. Pålsson, L., Monkman, A., Kemp, C., & Beeby, A. (2006). Absolute measurements of photoluminescence quantum yields of solutions using an integrating sphere. Journal of Fluorescence, 16(2), 267-273. https://doi.org/10.1007/s10895-005-0054-8

We demonstrate that absolute measurements of the photoluminescence quantum yield of solutions can be made using an integrating sphere and a conventional fluorimeter. With this method the need for measurements against a luminescence standard is overco... Read More about Absolute measurements of photoluminescence quantum yields of solutions using an integrating sphere.

Fast and slow time regimes of fluorescence quenching in conjugated polyfluorene-fluorenone random copolymers: The role of exciton hopping and dexter transfer along the polymer backbone (2006)
Journal Article
Dias, F., Knaapila, M., Monkman, A., & Burrows, H. (2006). Fast and slow time regimes of fluorescence quenching in conjugated polyfluorene-fluorenone random copolymers: The role of exciton hopping and dexter transfer along the polymer backbone. Macromolecules, 39(4), 1598-1606

The luminescence decay kinetics of polyfluorene copolymers containing fluorenone units randomly distributed along the polymer chain have been Studied by steady-state and time-resolved fluorescence techniques in toluene solution. The typical green emi... Read More about Fast and slow time regimes of fluorescence quenching in conjugated polyfluorene-fluorenone random copolymers: The role of exciton hopping and dexter transfer along the polymer backbone.

Bridged diiridium complexes for electrophosphorescent OLEDs : synthesis, X-ray crystal structures, photophysics, and devices. (2006)
Journal Article
Bettington, S., Tavasli, M., Bryce, M., Batsanov, A., Thompson, A., Al Attar, H., …Monkman, A. (2006). Bridged diiridium complexes for electrophosphorescent OLEDs : synthesis, X-ray crystal structures, photophysics, and devices. Journal of materials chemistry, 16(11), 1046-1052. https://doi.org/10.1039/b515258e

Results are presented which challenge the accepted view that dinuclear transition metal–ligand complexes are unsuitable for organic light-emitting device (OLED) applications due to their low luminescence quantum efficiencies. We establish for the fir... Read More about Bridged diiridium complexes for electrophosphorescent OLEDs : synthesis, X-ray crystal structures, photophysics, and devices..