Selective Adsorption of Water, Methanol, and Ethanol by Naphthalene Diimide-Based Coordination Polymers with Constructed Open Cu²⁺ Metal Sites and Separation of Ethanol/Acetonitrile

Abstract

The selective separation of ethanol/acetonitrile by porous materials has rarely been observed owing to their similar physicochemical properties. In this work, we report a new coordination network, [Cu 2 (4-pmntd) 2 (opd) 2 ](4-pmntd = N , N ′-bis(4-pyridymethy)naphthalene diimide, opd = disodium 1,2-benzenedicarboxylate), which exhibits selective separation of ethanol over acetonitrile. The weak coordination bonds formed by unsaturated Cu 2+ sites and hydroxyl groups are the key to such performance.

Efficient and Reversible Separation of Chloroform from Chlorinated Hydrocarbons and Water Utilizing a Two-Dimensional Coordination Network

“…In compound 4L1-Zn , the zigzag conformation of the 4-pmntd ligand facilitates the linkage between two Zn­(II) centers, while the opa ligand connects two Zn­(II) centers in a linear configuration. These linking modes between the Zn­(II) centers and the opa and 4-pmntd ligands contribute to the formation of a fascinating (4 2 ·6 3 ·8) topological network (Figure b) . Moreover, the 2D 4L1 networks vertically stack through internaphthalene diimide π···π interactions, with a distance of 3.86 Å.…”

“…These linking modes between the Zn(II) centers and the opa and 4pmntd ligands contribute to the formation of a fascinating (4 2 • 6 3 •8) topological network (Figure 1b). 30 Moreover, the 2D 4L1 networks vertically stack through internaphthalene diimide π•••π interactions, with a distance of 3.86 Å. These stacked networks exhibit interweaved and staggered arrangements, ultimately forming a three-dimensional (3D) framework with channels (Figure 1c).…”

The effect of conjugation degree of aromatic carboxylic acids on electronic and photo-responsive behaviors of naphthalenediimide-based coordination polymers

“…More importantly, the change of the frameworks affords a strong possibility for the generation of diversified interfacial contacts of EDs/EAs and subsequent distinguishing intermolecular electronic behaviors. 55–59 Therefore, the combination of flexible electron-deficient NDI with different electron-rich auxiliary ligands is an effective strategy for modulating the interfacial relationship of EDs/EAs as well as providing a great chance to ascertain the influence mechanism of ICT on PIET.…”

The Design and Optimization of Extractive Distillation for Separating the Acetone/n-Heptane Binary Azeotrope Mixture

“…Among the various separation methods of azeotropes, − azeotropic distillation (AD), − extractive distillation (ED), − and pressure-swing distillation (PSD) − are the most common methods. Wang et al investigated the influence of solvent flow rates on controlling extractive distillation for separation of a minimum-boiling azeotrope mixture (HEP/isobutanol).…”