Related Experiment Video
Updated: Oct 3, 2026

Synthesis of Triazole and Tetrazole-Functionalized Zr-Based Metal-Organic Frameworks Through Post-Synthetic Ligand Exchange
Published on: June 23, 2023
Europium-directed self-assembly of allyl bis(triazolyl)pyridine (btp) ligands
1School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland. joseph.byrne@ucd.ie.
Abstract:
Two allyl-appended 2,6-bis(1,2,3-triazol-4-yl)pyridine (btp) ligands 1 and 2 were synthesised and characterised, the latter a mannose-derivative. Both form luminescent europium(III) complexes with quantum yields 5.4% and 1.9%. Despite reporting previously the ability of ligand 1 to form self-templated [2]catenanes under ring-closing metathesis conditions (and 2 doing so in lower yields), attempts to form Eu(III)-centred catenanes from allyl-appended complexes were not successful due to geometrical and structural constraints. Self-assembly of both ligands with Eu(III) in acetonitrile was studied by UV-Vis absorbance and emission titrations, and for chiral carbohydrate-derivative 2, complementary circular dichroism titrations were also analysed. Stability constants were determined as log β1:3 = 20.9 and 22.6 respectively, for complexes [Eu·(btp)3]3+.
Related Concept Videos
π Molecular Orbitals of the Allyl Cation and Anion
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...
π Molecular Orbitals of the Allyl Radical
The allyl systems have identical molecular orbitals but differ in the number of π electrons.
[3,3] Sigmatropic Rearrangement of Allyl Vinyl Ethers: Claisen Rearrangement
Radical Substitution: Allylic Bromination

