Dendron-functionalized superparamagnetic nanoparticles with switchable solubility in organic and aqueous media: Matrices for homogeneous catalysis and potential MRI contrast agents
Dendron-functionalized superparamagnetic nanoparticles with switchable solubility in organic and aqueous media: Matrices for homogeneous catalysis and potential MRI contrast agents
复制标题
DOI：
10.1021/cm061782j
复制
发表时间：
2006-12-12
影响因子：
8.6
通讯作者：
Gao, Yong
中科院分区：
文献类型：
--
作者：
Duanmu, Chuansong;Saha, Indrajit;Gao, Yong
通过多步合成，实现了用三代不同代的Simanek（三聚氰胺）树枝状分子壳保护的磁赤铁矿纳米颗粒。所得的纳米团簇在各种溶剂中表现出可切换的溶解度，并作为可溶性基质进行检查，用于支持磁性可恢复的均相Pd催化剂在有机溶剂中，并作为潜在的MRI造影剂在水性介质中。Suzuki反应的成功促进和具有强MR弛豫的代依赖性树枝效应的观察表明树枝状磁赤铁矿纳米颗粒在许多领域具有广泛的应用前景。
Maghemite nanoparticles protected with a shell of Simanek ( melamine) dendrons of three different generations were achieved via multiple-step syntheses. The resulting nanoclusters exhibited switchable solubility in various solvents and were examined as soluble matrices for supporting magnetically recoverable homogeneous Pd catalysts in organic solvents and as potential MRI contrast agents in aqueous media. Successful promotion of Suzuki reactions and the observation of generation-dependent dendritic effects with strong MR relaxivities suggest broad application possibilities for dendron-maghemite nanoparticles across many fields.