Substantial Increase of the Ordering Temperature for {MnII/MoIII(CN)7}-Based Magnets as a Function of the 3d Ion Site Geometry: Example of Two Supramolecular Materials
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- 作者：Sté ; fania Tanase ; Floriana Tuna ; Philippe Guionneau ; Thierry Maris ; Guillaume Rombaut ; Corine Mathoniè ; re ; Marius Andruh ; Olivier Kahn ; and Jean-Pascal Sutter
- 刊名：Inorganic Chemistry
- 出版年：2003
- 出版时间：March 10, 2003
- 年：2003
- 卷：42
- 期：5
- 页码：1625 - 1631
- 全文大小：387K
- 年卷期：v.42,no.5(March 10, 2003)
- ISSN：1520-510X
文摘
Two molecule-based magnets, [Mn2(tea)Mo(CN)7]·H2O, 1, and [Mn2(tea)Mo(CN)7], 2 (tea stands for triethanolamine),formed with the 4d ion building block, [Mo(CN)7]4-, MnII ions, and an additional ligand, tea, have been preparedand structurally characterized by single-crystal X-ray analyses. Whereas 1 is obtained by a self-assembling processin solution, compound 2 is quantitatively formed through a smooth thermal treatment of 1. Their magnetic propertiesrevealed that these compounds exhibit magnetic ordering at Tc = 75 and 106 K respectively for compounds 1 and2. The difference for their critical temperature is attributed to the geometry of the coordination sphere of a MnII sitefound to be square-pyramidal for 1 and tetrahedral for 2.