Solvent-Induced Delamination of a Multifunctional Two Dimensional Coordination Polymer
Solvent-Induced Delamination of a Multifunctional Two Dimensional Coordination Polymer
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DOI：
10.1002/adma.201204676
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发表时间：
2013-04-18
影响因子：
29.4
通讯作者：
Zamora, Felix
中科院分区：
文献类型：
--
作者：
Gallego, Almudena;Hermosa, Cristina;Zamora, Felix
碳同素异形体现在可以作为3D（金刚石，石墨），2D（石墨烯），1D（纳米管）和0 D（富勒烯）材料获得。随着维数的降低，新的奇异性质出现了。[1]在这些材料中观察到的许多现象是其结构简单的结果，但在许多情况下，这不是优点，而是限制。对于需要更复杂结构的应用，必须使用替代材料。因此，通过将碳同素异形体的这种成功的尺寸可变性扩展到具有更高结构能力的其他化合物，可以设想材料科学中的新革命。这些趋势的很好的例子是共价有机框架（COF）[2]和配位聚合物（CP），以及它们的子类金属有机框架（MOFs）。[3]到目前为止，很少有基于COF形成2D材料的程序被报道。一些实施例已经示出了在超高真空条件下组装不同的有机分子以在表面上产生2D-COF。[4]尽管如此，在这些情况下，材料的横向尺寸减小限制了它们的潜在应用。最近的一些研究表明，通过简单的超声波处理所制备的块状材料，可以将块状层状COF剥离成薄的大面积平坦纳米结构。[5]对于CP的情况，最近的报告显示了它们作为分子导线[6]和具有广泛潜在应用的纳米颗粒[3b，7]的潜力（例如，催化剂，药物载体等）。虽然到目前为止，关于从CP生产2D材料的工作很少，[8]到目前为止，大多数工作都报道了在金属离子上真空沉积有机分子以生成MOF。[9]由于这种获得的层的横向尺寸减小，这种自下而上的过程目前被丢弃用于应用。最近，已经使用了基于层状3D层状CP的超声辅助剥离的自上而下的方法。[10个国家]
Carbon allotropes can now be obtained as 3D (diamond, graphite), 2D (graphene), 1D (nanotubes) and 0D (fullerenes) materials. As the dimensionality is reduced new and exotic properties arise.[1] Many of the phenomena observed in these materials are a consequence of their structural simplicity, but in many cases this is not an advantage but a limitation. For applications where more complex structures are required alternative materials are mandatory. Thus, a new revolution can be envisioned in materials science by extending this successful dimensional variability of carbon allotropes to other compounds with higher structural capabilities. Good examples of these tendencies are covalent organic frameworks (COFs)[2] and coordination polymers (CPs), and their subclass metal-organic frameworks (MOFs).[3] Few procedures have been reported so far for the formation of 2D materials based on COFs. Some few examples have shown the assembly of different organic molecules, under ultra-high vacuum conditions, to produce 2D-COFs on surfaces.[4] Albeit, in these cases the reduced lateral dimensions of the materials limits their potential applications. Some recent works have shown that bulk layered COFs can be exfoliated into thin large area flat nanostructures by simple ultrasonication of the as-made bulk material.[5]For the case of CPs recent reports have shown their potential of as molecular wires [6] and nanoparticles with a broad panel of potential applications [3b, 7](eg, catalyst, drug carriers,…). Although little has been done so far regarding the production of 2D materials from CPs,[8] up to now most works reported vacuum deposition of organic molecules on metal ions to generate MOFs.[9] This bottom-up procedure is currently discarded for applications due to the reduced lateral dimensions of such obtained layers. More recently the top-down approach based on ultrasound assisted exfoliation of laminar 3D-layered CPs has been used.[10]