Multicore Iron Oxide Mesocrystals Stabilized by a Poly(phenylenepyridyl) Dendron and Dendrimer: Role of the Dendron/Dendrimer Self-Assembly

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• 作者：David Gene Morgan ; Bethany S. Boris ; Nina V. Kuchkina ; Ekaterina Yu. Yuzik-Klimova ; Svetlana A. Sorokina ; Barry D. Stein ; Dmitri I. Svergun ; Alessandro Spilotros ; Athanasia Kostopoulou ; Alexandros Lappas ; Zinaida B. Shifrina ; Lyudmila M. Bronstein
• 刊名：Langmuir
• 出版年：2014
• 出版时间：July 22, 2014
• 年：2014
• 卷：30
• 期：28
• 页码：8543-8550
• 全文大小：576K
• ISSN：1520-5827

文摘

We report the formation of multicore iron oxide mesocrystals using the thermal decomposition of iron acetyl acetonate in the presence of the multifunctional and rigid poly(phenylenepyridyl) dendron and dendrimer. We thoroughly analyze the influence of capping molecules of two different architectures and demonstrate for the first time that dendron/dendrimer self-assembly leads to multicore morphologies. Single-crystalline ordering in multicore NPs leads to cooperative magnetic behavior: mesocrystals exhibit ambient blocking temperatures, allowing subtle control over magnetic properties using a minor temperature change.