Synthesis Structure and Magnetic Properties of an Amine-Template

Synthesis, structure and magnetic properties of an amine-templated Mn2+ 

Received 21st September 2006, Accepted 4th January 2007 First published as an Advance Article on the web 15th January 2007 DOI 10.1039/b613732f 

In pursuit of a compound with the Kagome structure, formed by a non-Fe3+ transitional metal ion with a spin of 5/2, we have synthesized an amine-templated Mn sulfate under solvothermal conditions. This compound with a perfect Kagome structure shows evidence for antiferromagnetic interactions with no long-range order. 

Mn2+ has the oxygen atoms from the sulfate along the z-axis and of the F atoms along the. xy-plane. Each MnF402 unit shares four of its Mn-F vertices with similar neighbors, with the Mn-F-Mn bonds roughly aligned in the 6c-plane. The Mn-O bond is 

Thermogravimetric analysis of I showed a two-step weight loss, the first loss corresponding to the loss of ammonia, amine and HF in the range 130-400 °C (obs. = 32.6%, calc. = 33.6%). The second weight loss occurs in the 460-850 °C range (obs. = 31%, calc. = 28%). The end product was found to be Mn304 (JCPDS file card PDF 00-001-1127). 

Synthesis, structure and magnetic properties of an amine-templated Mn (S = 5/2) sulfate with the Kagome structure 

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