Synthesis of cyano-bridged magnetic nanoparticles using room-temperature ionic liquids

被引：98

作者：

Clavel, Guylhaine ^{[1
]}

Larionova, Joulia ^{[1
]}

Guari, Yannick ^{[1
]}

Guerin, Christian ^{[1
]}

机构：

[1] Univ Montpellier 2, LCMOS, UMR 5637, F-34095 Montpellier 5, France

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2006年 / 12卷 / 14期

关键词：

cyanides; ionic liquids; magnetic properties; materials science; nanostructures;

D O I：

10.1002/chem.200500805

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A principally new exploit of ionic liquids as an alternative reaction medium in the synthesis of cyano-bridged coordination-polymer nanoparticles is reported. Stable colloid solutions containing nanoparticles of cyano-bridged molecule-based magnets, M-3[Fe(CN)(6)](2)/[RMIM][BF4] (M2+ = Ni, Cu, CO) and Fe-4[Fe(CN)(6)](3)/[RMIM] [BF4] (R = 1-butyl (BMIM), 1-decyl (DMIM)), were prepared in the corresponding 1-R-3methylimidazolium tetrafluoroborate [RMIM][BF4], which acts as both a stabilising agent and a solvent. By varying the length of the N-alkyl chain on the imidazolium cation of [RMIM](+) and the temperature, the growing process can be controlled to produce nanoparticles of different sizes. By studying the magnetic properties of frozen colloids it is shown that the relaxation of magnetisation is strongly influenced by interparticle interactions, which leads to the appearance of spin-glass-like dynamics in these systems.

引用

页码：3798 / 3804

页数：7

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