1. J. Sadlej, Advances in hydrogen bond research,  6-9.06.02, Tsukuba, plenar lecture.
  2. J. Sadlej, V. Buch, P. Devlin, IV Congress of Theoretical Chemical Physics, 9-16.07.02, Marly-le-Roi
  3. J. Sadlej, Quantum Systems in Chemistry and Physics IX, Les Houches, 25-30.09.2004
  4. J. Sadlej, IUPAC Workshop „Hydrogen bonding and other molecular interactions” plenar lecture, The member of the Task Group, Pisa, 5-9.09. 2005
  5. J. Sadlej, H. Cybulski, “On the chemical shielding in the small water clusters”?, XII Congress of Quantum Chemistry, Kyoto, Japonia, 20-26.05.06.
  6. J. Sadlej, invited lecture, meeting of Task Group IUPAC, “Water clusters-toward the revealing the mystery of water”,  IUPAC, Bangalore, India, 09.2006.
  7. J. Sadlej, J. Cz. Dobrowolski, R. Kołos, Matrix Isolated Species, Physics, Chemistry, Gordon Conference, Bates College, ME, USA, 15-20.06.2007.
  8. J. Sadlej, XVII International Conference “Horizons in Hydrogen Bond Research”, St. Petersburg, 1-8.09.2007, lecture: “Spectroscopic characterization of dihydrogen bonded systems”
  9. J. Sadlej, RSC Theoretical Chemistry Group, invited lecture, 5.12.2007, University College London. “Characterisation of dihydrogen-bonded complexes on the basis of spectroscopic parameters”
  10. J. Sadlej, “SAPT interaction energy decomposition for hydrogen-bonded and stacking structures”, ESPA2008, Palma de Mallorca, 09.2008
  11. J. Sadlej, invited lecture, “Characterisation of dihydrogen-bonded complexes on the basis of spectroscopic parameters”, Jerusalem, 05.2010
  12. J. Sadlej, invited lecture, “VCD as a novel probe for chirality transfer in molecular interactions”, Tromso, 06. 2010.
  13. J. Sadlej, invited lecture, “Are we closer to get to know the secret of liquid water?”, Women in Science, Warsaw Castel, Warsaw, 11. 2011; 100-years anniversary of the Noble Prize in chemistry awarded to M. Skłodowska-Curie