Nanoscale organization in the fluorinated room temperature ionic liquid: Tetraethyl ammonium (trifluoromethanesulfonyl)(nonafluorobutylsulfonyl)imide.
Nanoscale organization in the fluorinated room temperature ionic liquid: Tetraethyl ammonium (trifluoromethanesulfonyl)(nonafluorobutylsulfonyl)imide.
复制标题
氟化室温离子液体中的纳米级组织：四乙基铵(三氟甲磺酰基)(九氟丁基磺酰基)亚胺。
DOI：
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发表时间：
2018
影响因子：
4.4
通讯作者：
O. Russina
中科院分区：
文献类型：
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作者：
F. L. Celso;G. Appetecchi;C. Jafta;L. Gontrani;J. N. C. Lopes;Alessandro Triolo;O. Russina
氟化室温离子液体（FRTILs）是离子液体的一个分支，由于其特定的离子特征和氟尾部产生的特性的协同组合，越来越受到广泛潜在应用的关注。到目前为止，对这类化合物的微观和介观结构组织的实验研究还很有限。然而，这样的工作对于在原子水平上充分理解形态细节是必要的，这将对体积特性产生强烈的影响。在这里，我们使用x射线和中子散射之间的协同作用以及分子动力学模拟来获取技术相关FRTIL的结构细节，其特征是阴离子具有足够长的氟化尾部，以形成特定的形态特征。特别是，我们发现了第一个实验证据，在具有不对称双（全氟烷基）磺酰亚胺阴离子的FRTILs中，氟侧链倾向于在空间上分离成纳米尺度的空间异质性。这一特点，再加上传统RTILs中侧烷基链的微偏析，导致了三亲性il的概念，其技术应用尚未得到充分开发。
Fluorinated Room Temperature Ionic Liquids (FRTILs) are a branch of ionic liquids that is the object of growing interest for a wide range of potential applications, due to the synergic combination of specifically ionic features and those properties that stem from fluorous tails. So far limited experimental work exists on the micro- and mesoscopic structural organization in this class of compounds. Such a work is however necessary to fully understand morphological details at atomistic level that would have strong implications in terms of bulk properties. Here we use the synergy between X-ray and neutron scattering together with molecular dynamics simulations to access structural details of a technologically relevant FRTIL that is characterised by an anion bearing a long enough fluorinated tail to develop specific morphological features. In particular, we find the first experimental evidence that in FRTILs bearing an asymmetric bis(perfluoroalkyl)sulfonyl-imide anion, fluorous side chains tend to be spatially segregated into nm-scale spatial heterogeneities. This feature together with the well-established micro-segregation of side alkyl chains in conventional RTILs leads to the concept of triphilic ILs, whose technological applications are yet to be fully developed.