Valitud publikatsioonid


  1. Freiberg, Arvi; Chenchiliyan, Manoop; Rätsep, Margus; Timpmann, Kõu (2016). Spectral and kinetic effects accompanying the assembly of core complexes of Rhodobacter sphaeroides. BBA-Bioenergetics 1857 (11), 1727-1733.
  2. Nielsen, Jakob Toudahl; Kulminskaya, Natalia V.; Bjerring, Morten; Linnanto, Juha M.; Rätsep, Margus; Pedersen, Marie Østergaard; Lambrev, Petar H.; Dorogi, Márta; Garab, Győző; Thomsen, Karen; Jegerschöld, Caroline; Frigaard, Niels-Ulrik; Lindahl, Martin; Nielsen, Niels Chr. (2016). In situ high-resolution structure of the baseplate antenna complex in Chlorobaculum tepidum. Nature Communications 7, 12454.
  3. Reimers, Jeffrey R.; Biczysko, Malgorzata; Bruce, Douglas; Coker, David F.; Frankcombe, Terry J.; Hashimoto, Hideki; Hauer, Jürgen; Jankowiak, Ryszard; Kramer, Tobias; Linnanto, Juha; Mamedov, Fikret; Müh, Frank; Rätsep, Margus; Renger, Thomas; Styring, Stenbjörn; Wan, Jian; Wang, Zhuan; Wang-Otomo, Zheng-Yu; Weng, Yu-Xiang; Yang, Chunhong; Zhang, Jian-Ping; Freiberg, Arvi; Krausz, Elmars (2016). Challenges facing an understanding of the nature of low-energy excited states in photosynthesis. Biochimica et Biophysica Acta (BBA) - Bioenergetics 1857 (9), 1627-1640.
  4. Chenchiliyan, Manoop; Timpmann, Kõu; Jalviste, Erko; Adams, Peter G.; Hunter, C. Neil; Freiberg, Arvi (2016). Dimerization of core complexes as an efficient strategy for energy trapping in Rhodobacter sphaeroides. Biochem. Biophys. Acta - Bioenergetics 1857 (6), 634-642.


  1. Pajusalu, Mihkel; Kunz, Ralf; Rätsep, Margus; Timpmann, Kõu; Köhler, Jürgen; Freiberg, Arvi (2015). Unified analysis of ensemble and single-complex optical spectral data from light-harvesting complex-2 chromoproteins for gaining deeper insight into bacterial photosynthesis. Phys. Rev. E 92(5), 052709-1 -  052709-12.
  2. Puusepp, Marit; Kangur, Liina; Freiberg, Arvi (2015). Dissociation of the light-harvesting membrane protein complex I from Rhodobacter sphaeroides under high hydrostatic pressure. High Pressure Research, 35(2), 176 -180.
  3. Vrandecic, Kamarniso; Rätsep, Margus; Wilk, Laura; Rusevich, Leonid; Golub, Maksym; Reppert, Mike; Irrgang, Klaus; Kühlbrandt, Werner; Pieper, Jörg (2015). Protein Dynamics Tunes Excited State Positions in Light-Harvesting Complex II. The Journal of Physical Chemistry B, 119(10), 3920 - 3930.
  4. Eek, P.; Piht, M.-A.; Rätsep, M.; Freiberg, A.; Järving, I.; Samel, N. (2015). A conserved π–cation and an electrostatic bridge are essential for 11R-lipoxygenase catalysis and structural stability. Biochimica et Biophysica Acta - Molecular and Cell Biology of Lipids, 1851(10), 1377 - 1382.


  1. Reimers, Jeffrey R: Cai, Zheng-Li; Kobayashi, Rika; Rätsep, Margus, Freiberg, Arvi; Krausz, Elmars (2014). Formation of water–chlorophyll clusters in dilute samples of chlorophyll-a in ether at low temperature. Physical Chemistry Chemical Physics, 16(6), 2323 - 2330.
  2. Kunz, Ralf; Timpmann, Kõu; Southall, June; Cogdell, Richard J; Freiberg, Arvi; Köhler, Jürgen (2014). Single-Molecule Spectroscopy Unmasks the Lowest Exciton State of the B850 Assembly in LH2 from Rps. acidophila. Biophysical Journal, 106, 2008 - 2016.
  3. Timpmann, Kõu; Chenchilian, Manoop; Jalviste, Erko; Timney, John A; Hunter, C. Neil; Freiberg, Arvi (2014). Efficiency of light harvesting in a photosynthetic bacterium adapted to different levels of light. Biochimica et Biophysica Acta-Bioenergetics, 1837(10), 1835 - 1846.
  4. Pajusalu, Mihkel; Rätsep, Margus; Freiberg, Arvi (2014). Temperature dependent electron–phonon coupling in chlorin-doped impurity glass and in photosynthetic FMO protein containing bacteriochlorophyll a. Journal of Luminescence, 152, 79 - 83.
  5. Rätsep, Margus; Pajusalu, Mihkel; Linnanto, Juha Matti; Freiberg, Arvi (2014). Subtle spectral effects accompanying the assembly of bacteriochlorophylls into cyclic light harvesting complexes revealed by high-resolution fluorescence spectroscopy. Journal of Chemical Physics, 141(15), 155102-1 - 155102-10.
  6. Linnanto, Juha-Matti (2014). Preface of the “Symposium on Progress in Computational Studies of Solar Light Harvesting - Computational Approaches to Biology”. AIP Conference Proceedings, 1618(12), 12 - 12.
  7. Reimers, Jeffrey R.; Cai, Zheng-Li; Kobayashi, Rika; Rätsep, Margus; Freiberg, Arvi (2014). The Role of High-Level Calculations in the Assignment of the Q-Band Spectra of Chlorophyll. AIP Conference Proceedings, 1618, 18 - 22.
  8. Linnanto, Juha-Matti; Freiberg, Arvi (2014). Computation Studies into Architecture and Energy Transfer Properties of Photosynthetic Units from Filamentous Anoxygenic Phototrophs. AIP Conference Proceedings, 1618, 23 - 26.
  9. Pieper, Jörg; Freiberg, Arvi (2014). Electron-phonon and exciton-phonon coupling in light harvesting. Insights from line-narrowing spectroscopies. Golbeck, John; van der Est, Art (Toim.). The Biophysics of Photosynthesis (45 - 78).Springer


  1. Kunz, R.; Timpmann, K.; Southall, J.; Cogdell, R.J.; Köhler, J.; Freiberg, A. (2013). Fluorescence-Excitation and Emission Spectra from LH2 Antenna Complexes of Rhodopseudomonas acidophila as a Function of the Sample Preparation Conditions. Journal of Physical Chemistry B, 117(40), 12020 - 12029.
  2. Reimers, Jeffrey R.; Cai, Zheng-Li; Kobayashi, Rika; Rätsep, Margus; Freiberg, Arvi; Krausz, Elmars (2013). Assignment of the Q-bands of the chlorophylls: Coherence loss via Qx mixing. Scientific Reports, 3, 2761
  3. Kunz, Ralf; Timpmann, Kõu; Southall, June; Cogdell, Richard J.; Freiberg, Arvi; Köhler, Arvi (2013). Fluctuations in the electron-phonon coupling of a single chromoprotein. Angewandte Chemie International Edition, 52(33), 8726 - 8730.
  4. Leiger, Kristjan; Reisberg, Liis; Freiberg, Arvi (2013). Fluorescence Micro-Spectroscopy Study of Individual Photosynthetic Membrane Vesicles and Light-Harvesting Complexes. The Journal of Physical Chemistry B, 117(32), 9315 - 9326.
  5. Freiberg, A.; Pajusalu, M.; Rätsep, M. (2013). Excitons in intact cells of photosynthetic bacteria . The Journal of Physical Chemistry B, 117(38), 11007 - 11014.


  1. Freiberg, Arvi; Kangur, Liina; Olsen, John; Hunter, Neil. (2012). Structural implications of hydrogen-bond energetics in membrane proteins revealed by high-pressure spectroscopy. Biophysical Journal, 2352 - 2360.
  2. Kunz, Ralf; Timpmann, K.; Southall, June; Cogdell, Richard J.; Freiberg, A.; Köhler, Jürgen (2012). Exciton Self Trapping in Photosynthetic Pigment−Protein Complexes Studied by Single-Molecule Spectroscopy. The Journal of Physical Chemistry B, 116(36), 11017 - 11023.
  3. Freiberg, Arvi; Rätsep, Margus; Timpmann, Kõu (2012). A Comparative Spectroscopic and Kinetic Study of Photoexcitations in Detergent-isolated and Membrane-embedded LH2 Light-harvesting Complexes. Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1817(8), 1471 - 1482.
  4. Kangur, Liina; Olsen, John; Hunter, Neil; Freiberg, Arvi (2012). Estimating hydrogen bond energy in integral membrane chromoproteins by high hydrostatic pressure optical spectroscopy. Eshel Faragg (Toim.). Protein Structure (191 - 212).InTech - Open Access Publisher


  1. Linnanto, J.; Freiberg, A.; Korppi-Tommola, J. (2011). Quantum Chemical Simulations of Excited-State Absorption Spectra of Photosynthetic Bacterial Reaction Center and Antenna Complexes. Journal of Physical Chemistry B, 115(18), 5336 - 5544.
  2. Pieper, J.; Rätsep, M.; Trostmann, I.; Schmitt, F.-J.; Theiss, C.; Paulsen, H.; Eichler, H.J.; Freiberg, A.; Renger, G. (2011). Excitonic Energy Level Structure and Pigment-Protein Interactions in the Recombinant Water-Soluble Chlorophyll Protein. II. Spectral Hole-Burning Experiments. Journal of Physical Chemistry B, 115(14), 4053 - 4065.
  3. Pieper, J.; Rätsep, M.; Trostmann, I.; Paulsen, H.; Renger, G.; Freiberg, A. (2011). Excitonic Energy Level Structure and Pigment-Protein Interactions in the Recombinant Water-Soluble Chlorophyll Protein. I. Difference Fluorescence Line-Narrowing. Journal of Physical Chemistry B, 115(14), 4042 - 4052.
  4. Pajusalu, M.; Rätsep, M.; Trinkunas, G.; Freiberg, A. (2011). Davydov splitting of excitons in cyclic bacteriochlorophyll a nanoaggregates of bacterial light-harvesting complexes between 4.5 and 263 K. ChemPhysChem, 12, 634 - 644.
  5. Renge, Indrek; Rätsep, Margus; Freiberg, Arvi (2011). Intermolecular repulsive–dispersive potentials explain properties of impurity spectra in soft solids. Journal of Luminescence, 131(2), 262 - 265.
  6. Rätsep, M.; Cai, Z.-L; Reimers, J.; Freiberg, A. (2011). Demonstration and interpretation of significant asymmetry in the low-resolution and high-resolution Qy fluorescence and absorption spectra of bacteriochlorophyll a. Journal of Chemical Physics, 134, 024506
  7. Freiberg, Arvi (2011). Klorofüll - füüsikat ja bioloogiat ühendav molekul. Teadusmõte Eestis (VI) Elu- ja Maateadused (73 - 83). Tallinn: Eesti Teaduste Akadeemia


  1. Freiberg, A.; Timpmann, K.; Trinkunas, G. (2010). Spectral fine-tuning in excitonically coupled cyclic photosynthetic antennas. Chemical Physics Letters, 500(1-3), 111 - 115.
  2. Sener, M.; Strümpher, J.; Timney, J.; Freiberg, A.; Hunter, N.; Schulten, K. (2010). Photosynthetic vesicle architecture and constraints on efficient energy harvesting. Biophysical Journal, 99(1), 67 - 75.


  1. Pieper, J.; Rätsep, M.; Irrgang, K.-D.; Freiberg, A. (2009). Pigment-Pigment and Pigment-Protein Interactions in Monomeric Light-Harvesting Complex II of Green Plants Studied by Spectral Hole Burning and Fluorescence Line Narrowing. Journal of Physical Chemistry B, 113(31), 10870 - 10880.
  2. Rätsep, M.; Linnanto, J.; Freiberg, A. (2009). Mirror symmetry and vibrational structure in optical spectra of chlorophyll a. Journal of Chemical Physics, 130(19), 194501
  3. Rätsep, M.; Pajusalu, M.; Freiberg, A. (2009). Wavelength-dependent electron–phonon coupling in impurity glasses. Chemical Physics Letters, 1 - 4.
  4. Freiberg, A.; Rätsep, M.; Timpmann, K.; Trinkunas, G. (2009). Excitonic polarons in quasi-one-dimensional LH1 and LH2 bacteriochlorophyll a antenna aggregates from photosynthetic bacteria: A wavelength-dependent selective spectroscopy study. Chemical Physics, 357(1-3), 102 - 112.
  5. Freiberg, Arvi; Trinkunas, Gediminas (2009). Unraveling the Hidden Nature of Antenna Excitations. Laisk, Agu; Nedbal, Ladislav; Govindjee (Toim.). Photosynthesis in silico: Understanding Complexity from Molecules to Ecosystems (55 - 82). The Netherlands: Springer


  1. Kangur, L; Leiger, K; Freiberg, A (2008). Evidence for high-pressure-induced rupture of hydrogen bonds in LH2 photosynthetic antenna pigment-protein complexes. Journal of Physics: Conference Series , 121, 112004
  2. Kangur, L.; Timpmann, K.; Freiberg, A. (2008). Stability of Integral Membrane Proteins under High Hydrostatic Pressure: The LH2 and LH3 Antenna Pigment?Protein Complexes from Photosynthetic Bacteria. Journal of Physical Chemistry B, 112(26), 7948 - 7955.
  3. Rätsep, M.; Pieper, J.; Irrgang, K.-D.; Freiberg, A. (2008). Excitation Wavelength-Dependent Electron-Phonon and Electron-Vibrational Coupling in the CP29 Antenna Complex of Green Plants. Journal of Physical Chemistry B, 112, 110 - 118.
  4. Ellervee, A.; Freiberg, A. (2008). Formation of bacteriochlorophyll a coordination states under external high-pressure. Chemical Physics Letters, 450, 386 - 390.


  1. Leiger, K.; Freiberg, A.; Dahlbom, M.; Hush, N.; Reimers, J. (2007). Pressure-induced spectral changes for the special-pair radical cation of the bacterial photosynthetic reaction center. Journal of Chemical Physics, 126(21), 215102 - 215115.
  2. Rätsep, M.; Freiberg, A. (2007). Electron-phonon and vibronic couplings in the FMO bacteriochlorophyll a antenna complex studied by difference fluorescence line narrowing. Journal of Luminescence, 127(1), 251 - 259.
  3. Rätsep, M.; Freiberg, A. (2007). Unusual temperature quenching of Bacteriochlorophyll a fluorescence in FMO antenna protein trimers. Chemical Physics Letters, 434(4-6), 306 - 311.


  1. Pettai, H.; Oja, V.; Freiberg, A.; Laisk, A. (2006). Response to the "Comments to water-splitting activity of Photosystem II by far-red light in green plants" by H.-W. Trissl. Biochimica et Biophysica Acta-Bioenergetics, 1757(3), 158 - 159.
  2. Trinkunas, G.; Freiberg, A. (2006). A disordered polaron model for polarized fluorescence excitation spectra of LH1 and LH2 bacteriochlorophyll antenna aggregates. Journal of Luminescence, 119, 105 - 110.


  1. Ratsep, M.; Hunter, CN.; Olsen, JD.; Freiberg, A. (2005). Band structure and local dynamics of excitons in bacterial light-harvesting complexes revealed by spectrally selective spectroscopy. Photosynthesis Research, 86(1-2), 37 - 48.
  2. Pettai, H.; Oja, V.; Freiberg, A.; Laisk, A. (2005). Photosynthetic activity of far-red light in green plants. Biochimica et Biophysica Acta-Bioenergetics, 1708(3), 311 - 321.
  3. Timpmann, K.; Trinkunas, G.; Qian, P.; Hunter, CN.; Freiberg, A. (2005). Excitons in core LH1 antenna complexes of photosynthetic bacteria: Evidence for strong resonant coupling and off-diagonal disorder. Chemical Physics Letters, 414(4-6), 359 - 363.
  4. Trinkunas, G.; Freiberg, A. (2005). Abrupt exciton self-trapping in finite and disordered one-dimensional aggregates. Journal of Luminescence, 112(1-4), 420 - 423.
  5. Pettai, H.; Oja, V.; Freiberg, A.; Laisk, A. (2005). The long-wavelength limit of plant photosynthesis. FEBS Letters, 579(18), 4017 - 4019.


  1. Ellervee, A.; Linnanto, J.; Freiberg, A. (2004). Spectroscopic and quantum chemical study of pressure effects on solvated chlorophyll. Chemical Physics Letters, 394(1-3), 80 - 84.
  2. Freiberg, A.; Ratsep, M.; Timpmann, K.; Trinkunas, G. (2004). Dual fluorescence of single LH2 antenna nanorings. Journal of Luminescence, 108(1-4), 107 - 110.
  3. Gall, A.; Ellervee, A.; Robert, B.; Freiberg, A. (2004). The effect of internal voids in membrane proteins: high-pressure study of two photochemical reaction centres from Rhodobacter sphaeroides. FEBS Letters, 560(1-3), 221 - 225.
  4. Timpmann, K.; Trinkunas, G.; Olsen, JD.; Hunter, CN.; Freiberg, A. (2004). Bandwidth of excitons in LH2 bacterial antenna chromoproteins. Chemical Physics Letters, 398(4-6), 384 - 388.
  5. Timpmann, K.; Ratsep, M.; Hunter, CN.; Freiberg, A. (2004). Emitting excitonic polaron states in core LH1 and peripheral LH2 bacterial light-harvesting complexes. Journal of Physical Chemistry B, 108(29), 10581 - 10588.
  6. Riley, K.; Jankowiak, R.; Ratsep, M.; Small, GJ.; Zazubovich, V. (2004). Evidence for highly dispersive primary charge separation kinetics and gross heterogeneity in the isolated PSII reaction center of green plants. Journal of Physical Chemistry B, 108(29), 10346 - 10356.


  1. Timpmann, K.; Ellervee, A.; Kuznetsov, A.; Laisaar, A.; Trinkunas, G.; Freiberg, A. (2003). Self-trapped excitons in LH2 bacteriochlorophyll-protein complexes under high pressure. Journal of Luminescence, 102, 220 - 225.
  2. Freiberg, A.; Ratsep, M.; Timpmann, K.; Trinkunas, G. (2003). Self-trapped excitons in circular cacteriochlorophyll antenna complexes. Journal of Luminescence, 102, 363 - 368.
  3. Ratsep, M.; Freiberg, A. (2003). Resonant emission from the B870 exciton state and electron-phonon coupling in the LH2 antenna chromoprotein. Chemical Physics Letters, 377(3-4), 371 - 376.
  4. Ihalainen, JA.; Ratsep, M.; Jensen, PE.; Scheller, HV.; Croce, R.; Bassi, R.; Korppi-Tommola, JEI.; Freiberg, A. (2003). Red spectral forms of chlorophylls in green plant PSI - a site-selective and high-pressure spectroscopy study. Journal of Physical Chemistry B, 107(34), 9086 - 9093.
  5. Freiberg, A.; Ratsep, M.; Timpmann, K.; Trinkunas, G.; Woodbury, NW. (2003). Self-trapped excitons in LH2 antenna complexes between 5 K and ambient temperature. Journal of Physical Chemistry B, 107(41), 11510 - 11519.
  6. Gall, A.; Ellervee, A.; Sturgis, JN.; Fraser, NJ.; Cogdell, RJ.; Freiberg, A.; Robert, B. (2003). Membrane protein stability: High pressure effects on the structure and chromophore-binding properties of the light-harvesting complex LH2. Biochemistry, 42(44), 13019 - 13026.
  7. Jankowiak, R.; Ratsep, M.; Hayes, J.; Zazubovich, V.; Picorel, R.; Seibert, M.; Small, GJ. (2003). Primary charge-separation rate at 5 K in isolated photosystem II reaction centers containing five and six chlorophyll a molecules. Journal of Physical Chemistry B, 107(9), 2068 - 2074.


  1. Ellervee, E.; Freiberg, A. (2002). Pressure solvation of photosynthetic pigments. Defect and Diffusion Forum, 208(2), 135 - 138.


  1. Gall, A.; Ellervee, A.; Bellissent-Funel, MC.; Robert, B.; Freiberg, A. (2001). Effect of high pressure on the photochemical reaction center from Rhodobacter sphaeroides R26.1. Biophysical Journal, 80(3), 1487 - 1497.
  2. Timpmann, K.; Ellervee, A.; Pullerits, T.; Ruus, R.; Sundstrom, V.; Freiberg, A. (2001). Short-range exciton couplings in LH2 photosynthetic antenna proteins studied by high hydrostatic pressure absorption spectroscopy. Journal of Physical Chemistry B, 105(35), 8436 - 8444.
  3. Timpmann, K.; Katiliene, Z.; Woodbury, NW.; Freiberg, A. (2001). Exciton self trapping in one-dimensional photosynthetic antennas. Journal of Physical Chemistry B, 105(49), 12223 - 12225.


  1. Timpmann, K.; Woodbury, NW.; Freiberg, A. (2000). Unraveling exciton relaxation and energy transfer in LH2 photosynthetic antennas. Journal of Physical Chemistry B, 104(42), 9769 - 9771.


  1. Freiberg, A.; Timpmann, K.; Ruus, R.; Woodbury, NW. (1999). Disordered exciton analysis of linear and nonlinear absorption spectra of antenna bacteriochlorophyll aggregates: LH2-only mutant chromatophores of Rhodobacter sphaeroides at 8 K under spectrally selective excitation. Journal of Physical Chemistry B, 103(45), 10032 - 10041.


  1. Tars, M.; Ellervee, A.; Wasielewski, MR.; Freiberg, A. (1998). Biomolecular electron transfer under high hydrostatic pressure. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 54(9), 1177 - 1189.
  2. Freiberg, A.; Jackson, JA.; Lin, S.; Woodbury, NW. (1998). Subpicosecond pump-supercontinuum probe spectroscopy of LH2 photosynthetic antenna proteins at low temperature. Journal of Physical Chemistry A, 102(23), 4372 - 4380.
  3. Freiberg, A.; Timpmann, K.; Lin, S.; Woodbury, NW. (1998). Exciton relaxation and transfer in the LH2 antenna network of photosynthetic bacteria. Journal of Physical Chemistry B, 102(52), 10974 - 10982.
  4. Sturgis, JN.; Gall, A.; Ellervee, A.; Freiberg, A.; Robert, B. (1998). The effect of pressure on the bacteriochlorophyll a binding sites of the core antenna complex from Rhodospirillum rubrum. Biochemistry, 37(42), 14875 - 14880.


  1. Freiberg, A.; Ellervee, A.; Tars, M.; Timpmann, K.; Laisaar, A. (1997). Electron transfer and electronic energy relaxation under high hydrostatic pressure. Biophysical Chemistry, 68(1-3), 189 - 205.
  2. Gall, B.; Ellervee, A.; Tars, M.; Scheer, H.; Freiberg, A. (1997). Pressure effects on absorption spectra of the isolated reaction center of Photosystem II. Photosynthesis Research, 52(3), 225 - 231.
  3. Freiberg, A.; Lin, S.; Timpmann, K.; Blankenship, RE. (1997). Exciton dynamics in FMO bacteriochlorophyll protein at low temperatures. Journal of Physical Chemistry B, 101(37), 7211 - 7220.
  4. Timpmann, KE.; Taisova, AS.; Novoderezhkin, VI.; Fetisova, ZG. (1997). Oligomerization of light-harvesting pigments as a structural factor optimizing the photosynthetic antenna function. IV. Functional model of an oligomeric antenna of green bacteria. Molecular Biology, 31(5), 729 - 733.
  5. Timpmann, KE.; Taisova, AS.; Novoderezhkin, VI.; Fetisova, ZG. (1997). Functioning of oligomeric-type light-harvesting antenna. Biochemistry and Molecular Biology International, 42(1), 21 - 27.


  1. Lohmus, A.; Laisaar, A.; Freiberg, A.; Ellervee, A.; Korrovits, V.; Lohmus, R.; Tars, M. (1996). An immersion cryostat for mouting a high-pressure optical cell surrounded by nonboiling liquid nitrogen. Czechoslovak Journal of Physics, 46, Suppl. 5, 2775 - 2776.
  2. Fetisova, Z.; Freiberg, A.; Novoderezhkin, V.; Taisova, A.; Timpmann, K. (1996). Antenna size dependent exciton dynamics in the chlorosomal antenna of the green bacterium Chloroflexus aurantiacus. FEBS Letters, 383(3), 233 - 236.
  3. Freiberg, A.; Allen, JP.; Williams, JC.; Woodbury, NW. (1996). Energy trapping and detrapping by wild type and mutant reaction centers of purple non-sulfur bacteria. Photosynthesis Research, 48(1-2), 309 - 319.
  4. Fetisova, Z.; Freiberg, A.; Mauring, K.; Novoderezhkin, V.; Taisova, A.; Timpmann, K. (1996). Excitation energy transfer in chlorosomes of green bacteria: Theoretical and experimental studies. Biophysical Journal, 71(2), 995 - 1010.


  1. Timpmann, K.; Freiberg, A.; Sundstrom, V. (1995). Energy trapping and detrapping in the photosynthetic bacterium rhodopseudomonas-viridis - transfer-to-trap-limited dynamics. Chemical Physics, 194(2-3), 275 - 283.
  2. Monshouwer, R.; Visschers, RW.; Vanmourik, F.; Freiberg, A.; Vangrondelle, R. (1995). Low-temperature absorption and site-selected fluorescence of the light-harvesting antenna of rhodopseudomonas-viridis - evidence for heterogeneity. Biochimica et Biophysica Acta-Bioenergetics, 1229(3), 373 - 380.
  3. Hess, S.; Chachisvilis, M.; Timpmann, K.; Jones, MR.; Fowler, GJS.; Hunter, CN.; Sundstrom, V. (1995). Temporally and spectrally resolved subpicosecond energy transfer within the peripheral antenna complex (lh2) and from lh2 to the core antenna complex in photosynthetic purple bacteria. Proceedings of the National Academy of Sciences of the United States of America, 92(26), 12333 - 12337.


  1. Pullerits, T.; Visscher, KJ.; Hess, S.; Sundstrom, V.; Freiberg, A.; Timpmann, K.; Vangrondelle, R. (1994). Energy-transfer in the inhomogeneously broadened core antenna of purple bacteria - a simultaneous fit of low-intensity picosecond absorption and fluorescence kinetics. Biophysical Journal, 66(1), 236 - 248.
  2. Freiberg, A.; Timpmann, K.; Moskalenko, AA.; Kuznetsova, NY. (1994). Picosecond and nanosecond fluorescence kinetics of photosystem-ii reaction-center and its complex with cp47 antenna. Biochimica et Biophysica Acta-Bioenergetics, 1184(1), 45 - 53.


  1. Timpmann, K.; Zhang, FG.; Freiberg, A.; Sundstrom, V. (1993). Detrapping of excitation-energy from the reaction-center in the photosynthetic purple bacterium rhodospirillum-rubrum. Biochimica et Biophysica Acta, 1183(1), 185 - 193.
  2. Savikhin, S.; Freiberg, A. (1993). Origin of universal ultraviolet luminescence from the surfaces of solids at low-temperatures. Journal of Luminescence, 55(1), 1 - 3.
  3. Godik, V.; Timpmann, K.; Freiberg, A.; Moskalenko, AA. (1993). Picosecond dynamics of excitations in light-harvesting complex b800-850 from chromatium-minutissimum studied using fluorescence spectrochronography. FEBS Letters, 327(1), 68 - 70.
  4. Freiberg, A.; Ellervee, A.; Kukk, P.; Laisaar, A.; Tars, M.; Timpmann, K. (1993). Pressure effects on spectra of photosynthetic light-harvesting pigment-protein complexes. Chemical Physics Letters, 214(1), 10 - 16.


  1. Moskalenko, AA.; Toropygina, O.; Godik, VI.; Timpmann, K.; Freiberg, A. (1992). Investigation of spatial relationships and energy-transfer between complexes b800-850 and b890-rc from chromatium-minutissimum reconstituted into liposomes. FEBS Letters, 308(2), 133 - 136.
  2. Pullerits, T.; Freiberg, A. (1992). Kinetic-model of primary energy-transfer and trapping in photosynthetic membranes. Biophysical Journal, 63(4), 879 - 896.
  3. Timpmann, K.; Freiberg, A.; Moskalenko, AA.; Kuznetsova, NY. (1992). Picosecond fluorescence of photosystem-ii d1/d2/cyt b559 and d1/d2/cyt b559/cp47 pigment-protein complexes. Institute of Physics Conference Series, 126, 613 - 616.
  4. Freiberg, A.; Timpmann, K. (1992). Picosecond fluorescence spectroscopy of light-harvesting antenna complexes from rhodospirillum-rubrum in the 300-4-k temperature-range - comparison with the data on chromatophores. Journal of Photochemistry and Photobiology B-Biology, 15(1-2), 151 - 158.
  5. Kukk, P.; Freiberg, A. (1992). Resonant coherent anti-stokes and stokes raman-scattering spectra of molecular impurities at low-temperatures. Journal of Chemical Physics, 97(1), 118 - 127.
  6. Kukk, P. (1992). Interference effects in the intensity of coherent anti-Stokes Raman scattering in thin films. Journal of Raman Spectroscopy, 23(9), 483 - 488.


  1. Timpmann, KE.; Freiberg, AM.; Fetisova, ZG. (1991). Investigation of the orientation of qy-transition moments of light-harvesting bacteriochlorophyll-c in intact-cells of the green bacterium chloroflexus-aurantiacus - picosecond polarized fluorescence spectroscopy study. Biofizika, 36(1), 65 - 69.
  2. Pullerits, T.; Freiberg, A. (1991). Picosecond fluorescence of simple photosynthetic membranes - evidence of spectral inhomogeneity and directed energy-transfer. Chemical Physics, 149(3), 409 - 418.
  3. Timpmann, K.; Freiberg, A.; Godik, VI. (1991). Picosecond kinetics of light excitations in photosynthetic purple bacteria in the temperature-range of 300-4 k. Chemical Physics Letters, 182(6), 617 - 622.
  4. Valkunas, L.; Liuolia, V.; Freiberg, A. (1991). Picosecond processes in chromatophores at various excitation intensities. Photosynthesis Research, 27(2), 83 - 95.


  1. Freiberg, A. (1990). Primary energy-transfer. Photosynthetica, 24(2), 318 - 319.
  2. Travnikov, VV.; Freiberg, A.; Savikhin, SF. (1990). Surface excitons in zno crystals. Journal of Luminescence, 47(3), 107 - 112.
  3. Kukk, P.; Lohmus, A.; Korppitommola, J. (1990). Temperature-dependence of the resonant and nonresonant cars signals. Applied Spectroscopy, 44(8), 1381 - 1385.


  1. Freiberg, A.; Godik, VI.; Pullerits, T.; Timpman, K. (1989). Picosecond dynamics of directed excitation transfer in spectrally heterogeneous light-harvesting antenna of purple bacteria. Biochimica et Biophysica Acta, 973(1), 93 - 104.
  2. Savikhin, SF.; Freiberg, AM.; Travnikov, VV. (1989). Picosecond kinetics of emission by surface excitons in zno. JETP Letters, 50(3), 122 - 126.
  3. Aaviksoo, J.; Lippmaa, J.; Freiberg, A.; Savikhin, SF. (1989). Picosecond kinetics of exciton emission in cds. Fizika Tverdogo Tela, 31(3), 203 - 210.
  4. Kukk, PL.; Freiberg, AM. (1989). Resonance cars spectroscopy of the molecular tetracene impurity. Fizika Tverdogo Tela, 31(9), 174 - 180.


  1. Freiberg, A.; Godik, VI.; Pullerits, T.; Timpmann, K. (1988). Directed picosecond excitation transport in purple photosynthetic bacteria. Chemical Physics, 128(1), 227 - 235.
  2. Fetisova, ZG.; Freiberg, AM.; Timpmann, KE. (1988). Long-range molecular order as an efficient strategy for light harvesting in photosynthesis. Nature, 334(6183), 633 - 634.
  3. Timpmann, KE.; Freiberg, AM.; Fetisova, ZG. (1988). Orientational ordering of qy transition moments of the light-harvesting bacteriochlorophyll in intact-cells of green sulfur bacteria chlorobium limicola - investigations with picosecond polarized fluorescence spectroscopy. Doklady Akademii Nauk SSSR, 302(4), 976 - 979.
  4. Godik, VI.; Timpmann, KE.; Freiberg, AM. (1988). Spectral inhomogeneity of bacteriochlorophyll absorption-band of rhodospirillum-rubrum from the data of picosecond fluorescence spectroscopy. Doklady Akademii Nauk SSSR, 298(6), 1469 - 1473.