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Research

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Dr Lars-Olof Palsson


Researcher ID profile
Lecturer in the Department of Chemistry
Telephone: +44 (0) 191 33 42135

(email at lars-olof.palsson@durham.ac.uk)

Research Interests

Chemical physics and biophysics. I am interested in the application of optical spectroscopy and microscopy for investigations of biological systems and organic materials for display applications, molecular electronics and sensing of the biological environment. The work is interdisciplinary and relies on collaborations with colleagues active in synthetic chemistry and cell biology.

Vacancies

PhD studentship available from 2011 in joint EPSRC funded project together Professor David Parker FRS, "The Development of Circularly Polarised Luminescence Microscopy and the Creation of Responsive CPL probes for Imaging"
Contact for Dr Lars-Olof Pålsson (lars-olof.palsson@durham.ac.uk) for further information.

Modulation of the excited state by the di-electric medium

We are interested in how the medium affects the excited state decay and this is monitored using mainly time-resolved emission techniques. The aim of this work is to explore the sensing ability in organic chromophores and organo metallic complexes.

Luminescence Imaging and time-resolved emission microscopy

We are using luminescence imaging to study bio-active materials loaded with emissive probes. The excited state decay of organic fluorescence probes and organo metallic complexes is examined using time-resolved luminescence microscopy.

Time-gated detection is illustrated above. In the experiment the short lived fluorescence from the matrix has decayed before the gate is turned on and the photoluminescence from the metal centered emission is exclusively monitored. In combination we are also using conventional photon counting techniques to study the organic fluorescence. We are using microscope detection enabling single cells to be studied. We can study the excited state decay of many different types of emissive probes over a very wide dynamic range.

References.

  • Lars-Olof Pålsson, Benjamin S. Nehls, Frank Galbrecht, Benjamin A. Coombs, Fernando B. Dias, Tony Farrell, Ullrich Scherf and Andrew P. Monkman. (2010) Synthesis, excited state dynamics and optical characteristics of oligophenyl based swivel-cruciforms in solution and solid state. J. of Phys. Chem. Accepted.
  • Lars-Olof Pålsson, Changsheng Wang, Andrei S. Batsanov, Simon M. King, Andrew Beeby, Andrew P. Monkman  and Martin R. Bryce (2009). Intramolecular charge transfer in molecular wires comprised Oligoyne-Bridged Oxadiazol-Triphenylamine Dipoles: Synthesis, x-Ray Crystal Structure, Solution Electrochemistry and opto-electronic properties. Chem. Eur. J. 16, 1470-1479. 
  • Fernando B. Dias, Sam Pollock, Gordon Hedley, Lars-Olof Pålsson, Andrew P. Monkman, Mustafa Tavasli, Igor Perepichka, Martin R. Bryce (2006) Fast Intramolecular Charge Transfer assisted by Conformational Changes in the Excited State of Fluorene-dibenzothiophenedioxide Oligomers.J. o Phys. Chem. 110 (39), 19329-19339.
  • Lars-Olof Pålsson, Robert Pal, Benjamin S. Murray, David Parker and Andrew Beeby (2007) Two-photon absorption and photoluminescence of europium based emissive probes for bioactive systems. J. of Dalton Trans. 2007, 5726-5734.

Research Groups

Department of Chemistry

School of Biological and Biomedical Sciences

Research Interests

  • Chemical Physics
  • Biophysics
  • Optical Spectroscopy

Publications

Journal papers: academic

  • Palsson, LO, Vaughan, HL, Smith, A, Szablewski, M, Cross, GH, Roberts, T, Masutani, A, Yasuda, A, Beeby, A & Bloor, D (2006). Guest-host interactions between dichroic dyes and anisotropic hosts. Journal Of Luminescence 117(1): 113-122.
  • Perepichka, II, Perepichka, IF, Bryce, MR & Palsson, LO (2005). Dibenzothiophene-S,S-dioxide-fluorene co-oligomers. Stable,highly-efficient blue emitters with improved electron affinity. Chemical Communications (27): 3397-3399.
  • Knaapila, M, Kisko, K, Lyons, BP, Stepanyan, R, Foreman, JP, Seeck, OH, Vainio, U, Palsson, LO, Serimaa, R, Torkkeli, M & Monkman, AP (2004). Influence of molecular weight on self-organization, uniaxial alignment,and surface morphology of hairy-rodlike polyfluorene in thin films. Journal Of Physical Chemistry B 108(30): 10711-10720.
  • Knaapila, M, Torkkeli, M, Jokela, K, Kisko, K, Horsburgh, LE, Palsson, LO, Seeck, OH, Dolbnya, IP, Bras, W, ten Brinke, G, Monkman, AP, Ikkala, O & Serimaa, R (2003). Diffraction analysis of highly ordered smectic supramolecules ofconjugated rodlike polymers. Journal Of Applied Crystallography 36: 702-707.
  • Cross, GH, Hackman, NA, Thomas, PR, Szablewski, M, Palsson, LO & Bloor, D (2003). Local field and aggregation dependence of the micro- and macroscopicoptical non-linearity of zwitterionic molecules. Optical Materials 21(1-3): 29-37.
  • Palsson, LO, Szablewski, M, Roberts, A, Masutani, A, Love, GD, Cross, GH, Bloor, D, Kay, AJ, Woolhouse, AD, Masutani, A & Yasuda, A (2003). Orientation and solvatochromism of dyes in liquid crystals. Molecular Crystals And Liquid Crystals 402: 279-289.
  • Rothe, C, Hintschich, SI, Palsson, LO & Monkman, AP (2003). Pressure dependent radiative quantum yields of the prompt and delayedluminescence of polyfluorene films (vol 360, pg 111, 2002). Chemical Physics Letters 373(5-6): 646-647.
  • Knaapila, M, Lyons, BP, Kisko, K, Foreman, JP, Vainio, U, Mihaylova, M, Seeck, OH, Palsson, LO, Serimaa, R, Torkkeli, M & Monkman, AP (2003). X-ray diffraction studies of multiple orientation inpoly(9,9-bis(2-ethylhexyl)fluorene-2,7-diyl) thin films. Journal Of Physical Chemistry B 107(45): 12425-12430.
  • Varnavski, O., Samuel, I. D. W., Palsson, L.-O., Beavington, R., Burn, P. L. & Goodson, T. (2002). Investigations of excitation energy transfer and intramolecular interactions in a nitrogen corded distrylbenzene dendrimer system. Journal of Chemical Physics 116(20): 8893-8903.
  • Ikkala, OT, Knaapila, M, Torkkeli, M, Palsson, LO, Horsburgh, LE, Jokela, K, Dolbnya, IP, Bras, W, Serimaa, R, ten Brinke, G & Monkman, AP (2002). Novel route for polarized luminance: Cleaving side groups from alignedself-organized supramolecules. Abstracts Of Papers Of The American Chemical Society 224: U409-U409.
  • Palsson, LO, Wang, CS, Russell, DL, Monkman, AP, Bryce, MR, Rumbles, G & Samuel, IDW (2002). Photophysics of a fluorene co-polymer in solution and films. Chemical Physics 279(2-3): 229-237.
  • Knaapila, M, Ikkala, O, Torkkeli, M, Jokela, K, Serimaa, R, Dolbnya, IP, Bras, W, ten Brinke, G, Horsburgh, LE, Palsson, LO & Monkman, AP (2002). Polarized luminescence from self-assembled, aligned, and cleavedsupramolecules of highly ordered rodlike polymers. Applied Physics Letters 81(8): 1489-1491.
  • Rothe, C, Hintschich, SI, Palsson, LO, Monkman, AP, Guentner, R & Scherf, U (2002). Pressure dependent radiative quantum yields of the prompt and delayedluminescence of polyfluorene films. Chemical Physics Letters 360(1-2): 111-116.
  • Monkman, A. P., Palsson, L-O., Higgins, R. W. T., Wang, C. S., Bryce, M. R., Batsanov, A. S. & Howard, J. A. K. (2002). Protonation and subsequent intramolecular hydrogen bonding as a method to control chain structure and tune luminescence in heteroatomic conjugated polymers. Journal Of The American Chemical Society 124(21): 6049-6055.
  • Rothe, C, Palsson, LO & Monkman, AP (2002). Singlet and triplet energy transfer in a benzil-doped, light emitting,solid-state conjugated polymer. Chemical Physics 285(1): 95-101.
  • Palsson, L.-O., Beavington, R., Frampton, M. J., Lupton, J. M., Magennis, S. W., Markham, J. P. J., Pillow, J. N. G., Burn, P. L. & Samuel, I. D. W. (2002). Synthesis and excited state spectroscopy of tris (distyrylbenzenyl)amine-cored electroluminescent dendrimers. Macromolecules 35(21): 7891-7901.
  • Lo, SC, Palsson, LO, Kilitziraki, M, Burn, PL & Samuel, IDW (2001). Control of polymer-electrode interactions: the effect of leaving groupon the optical properties and device characteristics of EHPPV. Journal Of Materials Chemistry 11(9): 2228-2231.
  • Palsson, LO, Wang, CS, Monkman, AP, Bryce, MR, Rumbles, G & Samuel, IDW (2001). Fluorene co-polymer luminescence: implications for molecularinteractions. Synthetic Metals 119(1-3): 627-628.
  • Bloor, D, Kagawa, Y, Szablewski, M, Ravi, M, Clark, SJ, Cross, GH, Palsson, LO, Beeby, A, Parmer, C & Rumbles, G (2001). Matrix dependence of light emission from TCNQ adducts. Journal Of Materials Chemistry 11(12): 3053-3062.
  • Wang, CS, Kilitziraki, M, Palsson, LO, Bryce, MR, Monkman, AP & Samuel, IDW (2001). Polymeric alkoxy PBD [2-(4-biphenylyl)-5-phenyl-1,3,4-oxadiazole] forlight-emitting diodes. Advanced Functional Materials 11(1): 47-50.
  • Bourhill, G, Palsson, LO, Samuel, IDW, Sage, IC, Oswald, IDH & Duignan, JP (2001). The solid-state photoluminescent quantum yield of triboluminescentmaterials. Chemical Physics Letters 336(3-4): 234-241.
  • Whitelegg, SA, Buckley, A, Rahn, MD, Fox, AM, Bradley, DDC, Palsson, LO, Samuel, IDW, Webster, GR & Burn, PL (2001). Time-resolved PL studies of partially conjugated MEH-PPV - Control ofexcimer emission. Synthetic Metals 119(1-3): 575-576.
  • Palsson, LO, Flemming, C, Gobets, B, van Grondelle, R, Dekker, JP & Schlodder, E (1998). Energy transfer and charge separation in photosystem I: P700 oxidationupon selective excitation of the long-wavelength antenna chlorophyllsof Synechococcus elongatus. Biophysical Journal 74(5): 2611-2622.
  • Peterman, EJG, Wenk, SO, Pullerits, T, Palsson, LO, van Grondelle, R, Dekker, JP, Rogner, M & van Amerongen, H (1998). Fluorescence and absorption spectroscopy of the weakly fluorescentchlorophyll a in cytochrome b(6)f of Synechocystis PCC6803. Biophysical Journal 75(1): 389-398.
  • Palsson, LO, Gobets, B, Fleming, C, Ericsson, LM, VanGrondelle, R, Schlodder, E & Dekker, JP (1996). Long-wavelength antenna pigments in photosystem I. Progress In Biophysics & Molecular Biology 65: PE217-PE217.
  • Palsson, LO, Dekker, JP, Schlodder, E, Monshouwer, R & vanGrondelle, R (1996). Polarized site-selective fluorescence spectroscopy of thelong-wavelength emitting chlorophylls in isolated Photosystem Iparticles of Synechococcus elongatus. Photosynthesis Research 48(1-2): 239-246.
  • Gobets, B, Ericsson, M, Palsson, LO, Shubin, VV, Karapetyan, NV, VanGrondelle, R & Dekker, JP (1996). Site selected polarized fluorescence spectroscopy of photosystem Iparticles isolated from the cyanobacteria Spirulina platensis. Progress In Biophysics & Molecular Biology 65: PE221-PE221.
  • PALSSON, LO, TJUS, SE, ANDERSSON, B & GILLBRO, T (1995). ENERGY-TRANSFER IN PHOTOSYSTEM-I - TIME-RESOLVED FLUORESCENCE OF THENATIVE PHOTOSYSTEM-I COMPLEX AND ITS CORE COMPLEX. Chemical Physics 194(2-3): 291-302.
  • TJUS, SE, ROOBOLBOZA, M, PALSSON, LO & ANDERSSON, B (1995). RAPID ISOLATION OF PHOTOSYSTEM-I CHLOROPHYLL-BINDING PROTEINS BYANION-EXCHANGE PERFUSION CHROMATOGRAPHY. Photosynthesis Research 45(1): 41-49.
  • PALSSON, LO, TJUS, SE, ANDERSSON, B & GILLBRO, T (1995). ULTRAFAST ENERGY-TRANSFER DYNAMICS RESOLVED IN ISOLATED SPINACHLIGHT-HARVESTING COMPLEX-I AND THE LHC-I-730 SUBPOPULATION. Biochimica Et Biophysica Acta-bioenergetics 1230(1-2): 1-9.
  • PALSSON, LO, SPANGFORT, MD, GULBINAS, V & GILLBRO, T (1994). ULTRAFAST CHLOROPHYLL-B CHLOROPHYLL-A EXCITATION-ENERGY TRANSFER IN THEISOLATED LIGHT-HARVESTING COMPLEX, LHC-II, OF GREEN PLANTS -IMPLICATIONS FOR THE ORGANIZATION OF CHLOROPHYLLS. Febs Letters 339(1-2): 134-138.
  • Palsson, Lars-Olof, Spangfort, Michael, Gulbinas, & Vidmantas and Gillbro, Tomas (1993). Chlorophyll b to chlorophyll a energy transfer in the isolated light-harvesting complex II, LHC II, of green plants. Proc. SPIE Vol. 1921, p. 107-110, Laser Spectroscopy of Biomolecules, Jouko E. Korppi-Tommola; Ed 1921: 107-110.
  • Sharkov, A. V., Khoroshilov, E. V., Kryukov, I. V., Palsson, Lars-Olof, Kryukov, P. G., Fischer, R., Scheer, Hella-C. and & Gillbro, Tomas (1993). Femtosecond excitation transfer processes in biliprotein trimers. Proc. SPIE Vol. 1921, p. 136-145, Laser Spectroscopy of Biomolecules, Jouko E. Korppi-Tommola; Ed 1921: 136-145.
  • PALSSON, LO, MILLER, M & GILLBRO, T (1991). ENERGY-TRANSFER KINETICS IN THE GREEN BACTERIUM CHLOROFLEXUS-AURANTIACUS. Proceedings Of The Indian Academy Of Sciences-chemical Sciences 103(3): 413-416.

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