Photo of Randolf Kohn
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Personal profile

Research interests

A large variety of N-substituted 1,3,5-triazacyclohexanes (R3TAC) can be easily prepared from formaldehyde and primary amines. We are investigating the general coordination chemistry with transition metal ranging from the lanthanides to zinc. We are examining the complexes mainly by X-ray crystallography, UV/visible, IR, Raman, and NMR spectroscopy.
R3TAC occupies three coordination sites of the metal with unusually small N-metal-N angles of 60-65°. This leads to low steric demand of the ligand and allows the preparation of unusual complexes and increased catalytic activity in general.

Research Interests

  • Catalysis of Polymerisation and Trimerisation of Olefin
  • Bio-Analogous Copper Complexes for Oxygen Activation
  • Transition Metal Clusters

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“Smart Materials and Molecules for Sustainable Chemical Technologies and Clean Energy”

Hintermair, U., James, T., Bull, S., Islam, S., Hill, M., Kasprzyk-Hordern, B., Marken, F., Squires, A., Kohn, R., Johnson, A., Krewald, V., Düren, T., Eslava, S., White, T. J., Chye, J., Dong, Z., Pumera, M., Su, H. & Chi, R.


Project: Research-related funding

International Research Initiator Scheme 2015-2016

Kohn, R. & Yang, Y.


Project: Research-related funding

  • Research Output

    Triazacyclohexane Chromium Triflate Complexes as Precursors for the Catalytic Selective Olefin Trimerisation and its Investigation by Mass Spectrometry

    Köhn, R., Coxon, A., Chunawat, S., Heron, C., Mihan, S., Lyall, C., Reeksting, S. & Kociok-Kohn, G., 15 Jul 2020, In : Polyhedron. 185, 114572.

    Research output: Contribution to journalArticle

    Antibacterial Activities of New Saturated Heterocyclic Nitrogen Compounds

    Lefrada, L., Köhn, R., Malki, S., Mazouz, W., Bouchemma, A. & Hadjem, M., 11 Sep 2017, In : Algerian Journal of Natural Products. 5, 2, p. 463-468

    Research output: Contribution to journalArticle

    Open Access
  • Synthesis and antimicrobial activity of 1,3-bis-butyl-5-(4-iodophenyl)-1,3,5-triazacyclohexane

    Lefrada, L., Kohn, R., Malki, S., Mazouz, W., Bouchemma, A. & Hadjem, M., 31 Mar 2017, In : Central European Journal of Chemistry. 8, 1, p. 82-84

    Research output: Contribution to journalArticle

    Open Access
  • Efficient 1-hexene trimerization with triazacyclohexane chromium catalysts and detailed product analysis by 13C NMR

    Coxon, A. G. N. & Kohn, R. D., 6 May 2016, In : ACS Catalysis. 6, 5, p. 3008-3016 9 p.

    Research output: Contribution to journalArticle

    Open Access
  • 11 Citations (Scopus)
    521 Downloads (Pure)

    Selective trimerisation and polymerisation of ethylene: Halogenated chromium triazacyclohexane complexes as probes for an internal 'halogen effect'

    Kohn, R., Coxon, A. G. N., Hawkins, C. R., Smith, D., Mihan, S., Schuhen, K., Schiendorfer, M. & Kociok-Köhn, G., 14 Dec 2014, In : Polyhedron. 84, p. 3-13 11 p.

    Research output: Contribution to journalArticle

    Open Access
  • 3 Citations (Scopus)
    154 Downloads (Pure)