Piña María de Las Nieves, Gutiérrez María Susana, Panagos Mario, Duel Paulino, León Alberto, Morey Jeroni, Quiñonero David, Frontera Antonio
Department of Chemistry, Universitat de les Illes Balears Crta. de Valldemossa km 7.5 07122 Palma de Mallorca Spain
RSC Adv. 2019 Aug 5;9(42):24184-24191. doi: 10.1039/c9ra04490f. eCollection 2019 Aug 2.
It has been recently evidenced that hybrid magnetic nanomaterials based on perylene diimide (PDI) dopamine and iron oxide nanoparticles are useful for the adsorption and determination of volatile organic compounds (VOCs). However, NDI compounds are expensive and difficult to handle compared to smaller size diimides. Therefore, in this manuscript a combined experimental and theoretical investigation is reported including the analysis of the effect of changing the aromatic surface on the ability of these magnetite supported organic-inorganic hybrid nanoparticles (NPs) to adsorb several aromatic and non-aromatic VOCs. In particular, two new hybrid FeONPs are synthesized and characterized where the size of organic PDI dopamine linker is progressively reduced to naphthalene diimide (NDI) and pyromellitic diimide (PMDI). These materials were utilized to fill two sorbent tubes in series. Thermal desorption (TD) combined with capillary gas chromatography (GC)/flame detector (FID) was used to analyze both front and back tubes. Adsorption values (defined as % VOCs found in the front tube) were determined for a series of VOCs. The binding energies (DFT-D3 calculations) of VOC-FeONP complexes were also computed to correlate the electron-accepting ability of the arylene diimide (PDI, NDI or PMDI) with the adsorption capacity of the different tubes. The prepared hybrids can be easily separated magnetically and showed great reusability.
最近有证据表明，基于苝二酰亚胺（PDI）、多巴胺和氧化铁纳米颗粒的混合磁性纳米材料可用于挥发性有机化合物（VOCs）的吸附和测定。然而，与较小尺寸的二酰亚胺相比，NDI化合物价格昂贵且难以处理。因此，在本论文中，我们报告了一项结合实验和理论的研究，包括分析改变芳香表面对这些负载磁铁矿的有机-无机杂化纳米颗粒（NPs）吸附几种芳香和非芳香VOCs能力的影响。特别地，合成并表征了两种新型杂化FeONPs，其中有机PDI多巴胺连接体的尺寸逐渐减小至萘二酰亚胺（NDI）和均苯四甲酸二酰亚胺（PMDI）。这些材料被用于串联填充两个吸附管。热脱附（TD）结合毛细管气相色谱（GC）/火焰检测器（FID）用于分析前后两个管。测定了一系列VOCs的吸附值（定义为在前管中发现的VOCs的百分比）。还计算了VOC-FeONP配合物的结合能（DFT-D3计算），以将亚芳基二酰亚胺（PDI、NDI或PMDI）的电子接受能力与不同管的吸附容量相关联。制备的杂化物可以很容易地通过磁性分离，并显示出很好的可重复使用性。
