Nanoporous Magnets of Chiral and Racemic [{Mn(HL)}2Mn{Mo(CN)7}2] with Switchable Ordering Temperatures (TC = 85 K 106 K) Driven by H2O So
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- 作者：Julie Milon ; Marie-Christine Daniel ; Abdellah Kaiba ; Philippe Guionneau ; Sté ; phane Brandè ; s ; Jean-Pascal Sutter
- 刊名：Journal of the American Chemical Society
- 出版年：2007
- 出版时间：November 14, 2007
- 年：2007
- 卷：129
- 期：45
- 页码：13872 - 13878
- 全文大小：240K
- 年卷期：v.129,no.45(November 14, 2007)
- ISSN：1520-5126
文摘
Molecule-based solids represent a rare opportunity to combine, adjust, and interrelate structuraland physical functionalities to develop multifunctional materials. Here we report on a series of poroussupramolecular magnets whose magnetic properties are related to their sorption state. A family of magnetsof the formula [{Mn(HL)(H2O)}2Mn{Mo(CN)7}2]·2H2O have been obtained by assembling the heptacyano-metalate building unit {Mo(CN)7}4- with Mn(II) in the presence of protonated N,N-dimethylalaninol (L) asligand, the latter being either as a racemic mixture or as a chiral R- or S-enantiomer. The resulting magnetspossess an open framework structure and exhibit a TC with a switching behavior (TC = 85 K 106 K) asa function of the hydration state. Moreover, chiral magnets are formed with the optically active ligands.The H2O and gas (N2, CO2, CO) sorption features, the magnetic behavior of both the hydrated anddehydrated magnets, and the crystal structures of the hydrated chiral (S) and racemic magnets are described.