Synthesis and characterization of Co(II) and Mn(II) [M3L3] triangles

Adaptable 2,5-bis((1,2,3-triazol-4-yl)methoxy)pyrazine ligands for the simple self-assembly of homoleptic 1D coordination polymers

“…Ligands built upon a central pyrazine have been used to assemble both discrete structures, [22][23][24] as well as precursor sections for larger woven materials. 25,26 Following on from our earlier work with pyrazine-based ligands, 27 we report the synthesis and coordination of a new series of bis-tridentate 2,5-bis(((1-X-1,2,3-triazol-4-yl)methoxy)methyl)pyrazine (tzopz) Fig. 1 Structural formulae of A, the general structure of the ligands presented in this work, as well as B 1 and C 10 from literature, that have also resulted in homoleptic polymers.…”

“…Ligands built upon a central pyrazine have been used to assemble both discrete structures, 22–24 as well as precursor sections for larger woven materials. 25,26 Following on from our earlier work with pyrazine-based ligands, 27 we report the synthesis and coordination of a new series of bis-tridentate 2,5-bis(((1- X -1,2,3-triazol-4-yl)methoxy)methyl)pyrazine ( tzopz ) ligands ( X = allyl, butyl, phenyl, or benzyl for L1 – L4 respectively). These tzopz ligands were prepared from a bis-alkyne ligand precursor, 2,5-bis((prop-2-yn-1-yloxy)methyl) pyrazine ( 4 ).…”

Metallocyclic CuII–LnIII Single-Molecule Magnets from the Self-Assembly of 1,4-Diformylnaphthalene-2,3-diol

“…A combination of three transition metals and one lanthanide ion have, in the past, been used to template the macrocyclization of 2,3-dihydroxybenzene-1,4-dicarbaldehyde with various diamine linkers. − The Plieger group have previous experience in preparing multinuclear metal complexes with potentially interesting magnetic properties, − and the Ishida group have expertise in the magnetic characterization of 3d–4f complexes, particularly those involving copper­(II). − Inspired by the Zn 3 La system first reported by Nabeshima et al and later extended to other metal combinations by Brooker et al, ,,− we investigated the self-assembly and successful crystallization of L 3 Cu 3 Ln complexes using the acyclic ligand system 1,4-diformylnaphthalene-2,3-diol (H 2 L ). While there are numerous examples of magnetically coupled Cu–Ln systems, , throughout the literature, there are very few Cu 3 Ln complexes featuring four in-plane metal ions; − and a CCDC search indicated that, outside of the previously mentioned complexes of Nabeshima and Brooker, there are no other structurally characterized examples which exclusively contain Cu–O–Ln bridges.…”