A {GdNa} Molecular Quadruple-Wheel with a Record Magnetocaloric Effect at Low Magnetic Fields and Temperatures.

Reaction of Gd(OAc)·4HO, salicylaldehyde and CHONa in MeCN/MeOH affords [GdNa(OAc)(HCO)(CO)(HO)]·9HO.0.5MeCN (·9HO.

A ferromagnetically coupled pseudo-calixarene [Co] wheel that self-assembles as a tubular network of capsules.

Reaction of Co(OAc)·4HO and Hsal in a basic MeCN solution affords the hexadecanuclear wheel [Co(sal)(OAc)]·16MeCN (1·16MeCN) that displays ferromagnetic nearest neighbour exchange and has pseudo-calixarene character. Symmetry equivalent wheels self-assemble to form remarkable tubular networks of capsules in the extended structure.

Constructing "Closed" and "Open" {Mn} Clusters.

Use of the 1,3,5-tri(2-hydroxyethyl)-1,3,5-triazacyclohexane ligand, LH, in manganese chemistry affords access to two structurally related {Mn} clusters: a "closed" {Mn Mn } puckered square wheel of formula [MnL(LH)O(OH)(MeO)Br(imH)(HO)](Br) (; imH = imidazole) and an "open" {Mn } rod of formula [Mn LO(aibH)(aib)(MeO)(MeOH)](NO) (, aibH = 2-amino-isobutyric acid). In each case the triaza ligands, L/LH, direct the formation of {Mn} triangles with their N atoms preferentially bonding to the Jahn-Teller axes of the Mn ions. Subsequent self-assembly is dependent on the anion of the Mn salt and the identity of the organic coligand employed-the terminally bonded imidazole and the chelating/bridging amino acid.

A [Mn] wheel-of-wheels.

A [Mn18] wheel of wheels is obtained from the reaction of MnBr2·4H2O and LH3 in MeOH. The metallic skeleton reveals two asymmetric [MnIII6MnII2] square wheels connected into a larger wheel via two MnII ions. Magnetic susceptibility and magnetisation data reveal competing exchange interactions, supported by computational studies.

The first amino acid bound manganese-calcium clusters: a {[MnCa]} methylalanine complex, and a [MnCa] trigonal prism.

An amino acid containing octanuclear heterometallic {[MnCa]} cluster has been synthesized, alongside a structurally-related trigonal prismatic [MnCa] cage.

Dodecanuclear [Mn6(III)Ln6(III)] species: synthesis, structures and characterization of magnetic relaxation phenomena.

The use of H3L (= 2-(β-naphthalideneamino)-2-hydroxymethyl-1-propanol) in mixed-metal manganese-lanthanide carboxylate cluster chemistry has led to the isolation of two new dodecametallic heteronuclear isostructural [Mn6(III)Ln6(III)] complexes (Ln = Gd, Dy), with the Dy analogue displaying temperature and frequency dependent out-of-phase signals suggesting possible single molecule magnetism behaviour.

A family of [Mn(III)₆Ln(III)₂] rod-like clusters.

Employment of H3L (= 2-(β-naphthalideneamino)-2-hydroxymethyl-1-propanol) in mixed-metal manganese-lanthanide cluster chemistry has led to the isolation of five new octametallic heteronuclear isostructural [Mn(III)6Ln(III)2] complexes. More specifically, the reaction of Mn(ClO4)2·6H2O with H3L and the corresponding lanthanide nitrate in MeCN in the presence of a base, NEt3, yielded four complexes with the general formula [Mn(III)6Ln(III)2O2(OH)2(H2O)2(HL)6(NO3)6]·6MeCN·0.5H2O (Ln: Gd, 1·6MeCN·0.