Organic Ferromagnets. Hydrogen Bonded Supramolecular Magnetic Organizations Derived from Hydroxylated Phenyl α-Nitronyl Nitroxide Radicals
Organic Ferromagnets. Hydrogen Bonded Supramolecular Magnetic Organizations Derived from Hydroxylated Phenyl α-Nitronyl Nitroxide Radicals
复制标题
羟基化苯基 α-硝硝基氮氧自由基衍生的氢键超分子磁性组织。
DOI：
10.1051/jp1:1996199
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
J. Novoa
中科院分区：
文献类型：
--
作者：
J. Veciana;J. Cirujeda;C. Rovira;E. Molins;J. Novoa
综述了氢键作为晶体设计元素在制备具有相关磁性的固态超分子组织方面的能力。这里将说明氢键有两个不同的目的。一种功能是一种结构功能，通过它可以将自由基分子的相对排列集中到一定的水平。氢键的另一种机制是磁性的，因为这些键为分子间磁性相互作用的传递引入了适当的途径。用这种方法制备了几种含羟基苯基a-硝基氮氧自由基的分子磁性固体。这些分子固体是由超分子基序(二聚体、链和平面)通过强氢键连接在一起形成的，这些氢键通过形成其余晶体的其他弱作用力相互连接。因此，固体表现出不同的结构维度，在某些情况下确实与Trie磁性维度一致。相应地，由于具有如此不同的结构和磁性维度，所得到的分子-Ar固体显示出各种各样的磁性行为。值得注意的是这里报道的纯有机2-D和3-D铁磁体。最后，包括了解释分子间磁相互作用的最相关的机制，以及纯有机磁体最有希望的应用。
The capacity of hydrogen bonds as crystalline design elements for the prepara- tion of solid state supramolecular organizations with relevant magnetic properties is reviewed. It will be shown here that hydrogen bonds fuIfiII two distinct purposes. One function is a struc- tural one through which is possible to central up to certain level the relative arrangements of radical molecules. The other rote of hydrogen bonds is a magnetic one smce these bonds intro- duce proper pathways for the transmission of intermolecular magnetic interactions. Using this methodological approach several molecular magnetic solids have been prepared with hydroxy- Iated phenyl a-nitronyl nitroxide radicals. These molecular sohds are formed by supramolecular motifs (dimers, chains, and planes) bonded by strong hydrogen bonds which are hnked to each other by other weak forces that form the rest of the crystals. Consequently, the solids show different structural dimensionalities that in some cases do trot agree with trie magnetic ones. Accordingly with such distinct structural and magnetic dimensionalities, the resulting molecu- Iar solids show a wide variety of magnetic behaviors. Remarkable are the purely organic 2-D and 3-D ferromagnets reported here. Finally, the most relevant mechanisms explaining inter- moIecuIar magnetic interactions as weII as the most promismg applications expected for purely orgamc magnets are aise mcluded.