Tuning n-Alkane Adsorption on Mixed-Linker Zeolitic Imidazolate Framework-8-90 via Controllable Ligand Hybridization: Insight into the Confinement from an Energetics Perspective
Tuning n-Alkane Adsorption on Mixed-Linker Zeolitic Imidazolate Framework-8-90 via Controllable Ligand Hybridization: Insight into the Confinement from an Energetics Perspective
复制标题
通过可控配体杂交调节混合连接基沸石咪唑酯框架-8-90上的正烷烃吸附：从能量学角度洞察限制
DOI：
10.1021/acs.iecr.9b00941
复制
发表时间：
2019
影响因子：
4.2
通讯作者：
Shen Benxian
中科院分区：
文献类型：
--
作者：
Sun Hui;Jiang Hao;Kong Ruiqi;Ren Danni;Wnag Dan;Tan Jialun;Wu Di;Zhu Weinan;Shen Benxian
连接基杂交为沸石咪唑酯骨架 (ZIF) 的结构和性能提供了巨大的可调性。我们使用二元有机配体合成了杂化 ZIF-8-90 结构，并使用多种技术检查了它们的组成和结构演变，包括场发射扫描电子显微镜 (FESEM)、拉曼、X 射线衍射 (XRD)、热重-差示扫描量热法 (TG-DSC)、N2 吸附和 1H NMR 分析。精心设计的 ZIF 结构配体组成有助于连续可切换的孔结构。随着甲醛-2-咪唑（OHC-IM）比例从ZIF-8-90-S1的0.31增加到ZIF-8-90-S5的0.88，平均微孔直径从0.72 nm缩小到0.65 nm，而中孔宽度从2.18 nm单调增加到3.29 nm。框架极性的增加可以增强客体-主体相互作用，因此对杂化 ZIF-8-9 上正己烷的吸附亲和力产生积极的影响...
Linker hybridization provides enormous tunability of structures and properties of zeolitic imidazolate frameworks (ZIFs). We synthesized hybrid ZIF-8-90 structures by using binary organic ligands and examined their compositional and structural evolution using multiple techniques including field emission scanning electron microscopy (FESEM), Raman, X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC), N2 adsorption, and 1H NMR analyses. Well-designed ligand compositions of ZIF structures contribute to the continuously switchable pore structures. The average micropore diameter shrinks from 0.72 to 0.65 nm, while the mesopore width monotonically increases from 2.18 to 3.29 nm as the carboxaldehyde-2-imidazole (OHC-IM) proportion rises from 0.31 for ZIF-8-90-S1 to 0.88 for ZIF-8-90-S5. An increase in framework polarity can lead to the strengthened guest–host interaction and therefore energetically exerts a positive effect on the adsorption affinity of n-hexane on hybrid ZIF-8-9...