Directional Materials—Nanoporous Organosilica Monoliths with Multiple Gradients Prepared Using Click Chemistry.
Directional Materials—Nanoporous Organosilica Monoliths with Multiple Gradients Prepared Using Click Chemistry.
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DOI：
10.1002/anie.201502878
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发表时间：
2015-09
影响因子：
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通讯作者：
A. Schachtschneider;Martin Wessig;Martin Spitzbarth;A. Donner;C. Fischer;M. Drescher;S. Polarz
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文献类型：
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作者：
A. Schachtschneider;Martin Wessig;Martin Spitzbarth;A. Donner;C. Fischer;M. Drescher;S. Polarz
一个以上的功能实体的存在是材料的基础，这是完成补充或后续任务所需要的。虽然制造两种不同官能团均匀分布的材料是可行的，但沿着一定距离从一种性质平滑过渡到另一种性质的情况极为罕见。我们提出了一种在微观结构水平上具有功能梯度的高表面积固体的新方法。以一种新型溶胶-凝胶前驱体制备了具有最大叠氮基团密度的周期性有序介孔有机硅（PMOs）和气凝胶样整体体。通过点击化学将叠氮化物控制和快速转化为许多功能是实现歧管梯度剖面的先决条件。在这里，我们讨论具有化学、光学和结构梯度的材料，这对于所有需要方向性的应用都很有趣，例如色谱。
The existence of more than one functional entity is fundamental for materials, which are desired of fulfilling complementary or succeeding tasks. Whereas it is feasible to make materials with a homogeneous distribution of two different, functional groups, cases are extremely rare exhibiting a smooth transition from one property to the next along a defined distance. We present a new approach leading to high-surface area solids with functional gradients at the microstructural level. Periodically ordered mesoporous organosilicas (PMOs) and aerogel-like monolithic bodies with a maximum density of azide groups were prepared from a novel sol-gel precursor. The controlled and fast conversion of the azide into numerous functions by click chemistry is the prerequisite for the implementation of manifold gradient profiles. Herein we discuss materials with chemical, optical and structural gradients, which are interesting for all applications requiring directionality, for example, chromatography.