Porphyrin-based molecular tweezers as a receptor for bipyridinium guests

Maxwell J. Gunter, Martin R. Johnston

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


A porphyrin with two appended benzo-crown ethers in the form of a porphyrin-based molecular tweezer was synthesized and shown to bind the bipyridinium guests paraquat, diquat and Pt(bpy)(NH3)2 dications in several solvents. The conformations of the host molecule were shown to be solvent dependent. Lack of binding by a non-crown ether containing analogue demonstrated the necessity of the crown ether chains for the binding of guest molecules.

Original languageEnglish
Pages (from-to)1771-1774
Number of pages4
JournalTetrahedron Letters
Issue number13
Publication statusPublished - 24 Mar 1992
Externally publishedYes


  • bipyridinium
  • crown ether
  • host-guests
  • molecular receptor
  • porphyrin


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