Nanoporous Polymer Crystals with Cavities and Channels
Nanoporous Polymer Crystals with Cavities and Channels
复制标题
具有空腔和通道的纳米多孔聚合物晶体
DOI：
10.1021/cm800462h
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发表时间：
2008
影响因子：
8.6
通讯作者：
G. Guerra
中科院分区：
文献类型：
--
作者：
V. Petraccone;O. R. Ballesteros;Oreste Tarallo;Paola Rizzo;G. Guerra
一种廉价、商业化且易于加工的碳氢聚合物(间规聚苯乙烯，S-PS)可以在两个不同的纳米孔相(δ和e)中结晶，显示出对几个客体分子的大量吸收，因此适合于化学分离和空气/水净化以及传感器应用。最近发现的S-PS的e相的特征是沿着c轴穿过晶胞的沟道状空穴，而不是像已经观察到的δ相那样由孤立的空穴组成。δ和e纳米多孔相的客体吸附最终导致了两种不同类型的聚合物共晶，其中平面客体分子的平面大致垂直于和平行于聚合物链轴。E相通道允许与客体分子形成比链轴周期长得多的共晶，并且由于客体分子之间可能发生反应，为获得新的杂化材料打开了可能性。
A cheap, commercial, and easy-to-process hydrocarbon polymer (syndiotactic polystyrene, s-PS) can be crystallized in two different nanoporous phases (δ and e) that show large uptake of several guest molecules and hence are suitable for applications in chemical separations and air/water purification as well as in sensorics. The recently discovered e phase of s-PS is characterized by channel-shaped cavities crossing the unit cells along the c axis rather than by isolated cavities as observed for the already known δ phase. Guest sorption from the δ and e nanoporous phases eventually leads to two different classes of polymer cocrystals, where planar guest molecules present their planes roughly perpendicular and parallel to the polymer chain axes. The e phase channels allow cocrystal formation with guest molecules much longer than the chain axis periodicity and, due to possible reactions between guest molecules, open the possibility to achieve new hybrid materials.