Dipolar Rotors Orderly Aligned in Mesoporous Fluorinated Organosilica Architectures
Dipolar Rotors Orderly Aligned in Mesoporous Fluorinated Organosilica Architectures
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DOI：
10.1002/anie.201412412
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发表时间：
2015-04-13
影响因子：
16.6
通讯作者：
Sozzani, Piero
中科院分区：
文献类型：
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作者：
Bracco, Silvia;Beretta, Mario;Sozzani, Piero
制备了基于杂化含氟有机硅的新型介孔共价骨架，以实现在其结构中含有动态偶极子的快速分子转子的周期性结构。基于氟化对二乙烯基苯部分设计的移动的元件通过硅氧烷键被整合到稳健的共价结构中，并且不仅显示了芳环的快速动力学（ca. 10（8）Hz，325 K），而且是在施加电场的刺激下快速偶极重取向的典型介电响应。此外，介孔通道是开放的，可以在气体分子中扩散，转子的流动性可以单独调节的I-2蒸汽。碘进入周期性结构的通道并与二乙烯基-氟-亚苯基转子的枢轴双键反应，影响它们的运动和介电性质。
New mesoporous covalent frameworks, based on hybrid fluorinated organosilicas, were prepared to realize a periodic architecture of fast molecular rotors containing dynamic dipoles in their structure. The mobile elements, designed on the basis of fluorinated p-divinylbenzene moieties, were integrated into the robust covalent structure through siloxane bonds, and showed not only the rapid dynamics of the aromatic rings (ca. 10(8)Hz at 325K), as detected by solid-state NMR spectroscopy, but also a dielectric response typical of a fast dipole reorientation under the stimuli of an applied electric field. Furthermore, the mesochannels are open and accessible to diffusing in gas molecules, and rotor mobility could be individually regulated by I-2 vapors. The iodine enters the channels of the periodic structure and reacts with the pivotal double bonds of the divinyl-fluoro-phenylene rotors, affecting their motion and the dielectric properties.