Novel 18-membered hexanuclear manganese metalladiazamacrocycle

作者：Shu Tian Pin; Feng Hai Mei; Wen Jun Long; Pan Xian Wei; Lei Ke wei^*; Liang Hong Ze

来源：Journal of Molecular Structure, 2009, 936(1-3): 19-22.

DOI：10.1016/j.molstruc.2009.07.011

• 18-Metallacrowns-6
• Self-assembly
• Disc molecule
• Oval cavity
• Magnetic property

The novel macrocyclic hexanuclear manganese(III) 18-Metallacrowns-6, [Mn(6)[(amshz)(6)(DMA)(5)(H(2)O)]center dot 3 DMA center dot H(2)O (1), has been synthesized by a self-assembly and characterized, where amshz(3-) is N-acetyl-4-methyl-salicylhydrazide. The ring is formed by the succession of six structural moieties of the type [Mn(III)-N-N] through hydrazide N-N groups bridging the ring Mn ions. The ligand enforces the metal ions to form the stereochemistry of a propeller configuration with alternate ...Delta Lambda Delta Lambda... -type chiral forms. The disc molecule offers a oval cavity with an entrance diameter similar to 6.7 angstrom, inner largest diameter similar to 9.6 angstrom and height similar to 4.6 angstrom. The magnetic properties of the metallacrown are characterized by a weak antiferromagnetic exchange interaction, with the value of mu(eff) = 12.10 mu(B) at 300 K between the Mn(3+) ion spins with S = 2 in the cyclic system.

• 出版日期2009-11-12
• 单位宁波大学