Incorporating Three Chiral Channels into an In-MOF for Excellent Gas Absorption and Preliminary Cu²⁺ Ion Detection

Abstract

A novel multifunctional chiral In-MOF (InOF-18) was synthesized by a solvothermal method. The compound simultaneously contains exposed N groups and three kinds of chiral channels with different window sizes, chiral screw axes, and helicities as measured by single-crystal X-ray diffraction. Luminescence measurements demonstrate that InOF-18 exhibits high sensitivity and ultrafast response (less than 5 s) for Cu2+ ion detection. Moreover, InOF-18 shows a high H2 uptake of 179.77 cm3 g–1 (1.60 wt %) at 77 K and 1.0 bar and also had excellent selective gas sorption behaviors with IAST selectivity values of 10.44 and 37.83 at 273 K and 1.0 bar for CO2/CH4 and CO2/N2, respectively.

Lithium Functionalization Promoted by Amide-Containing Ligands of a Cu(pzdc)(pia) Porous Coordination Polymer for CO2 Adsorption Enhancement

“…While some studies suggest structural or flexibility changes, ,− there remains much work to be done to establish direct correlations. Much of the effort in the case of alkali- and alkaline-earth-metal incorporation has focused on hydrogen storage ,− and on the improvement of CO 2 adsorption or selectivity in gas mixtures. ,,,− Theoretical and experimental studies have been conducted to study Li incorporation into frameworks with Zn metal centers − ,− ,− ,,,, and other metal nodes, including Cu, Zr, Cr, Al, and In. ,,,,,,,, Simulations have explored frameworks with (1) substitution of one or more selected hydrogen atoms of the aromatic rings by Li or LiO or (2) Li added to positions apparently prone to accept cations or estimated as less energetically demanding: e.g., above or on top of the electron clouds of the aromatic rings. ,,,− ,− ,,,,, Similarly, experimental results show that Li has been inserted through the exchange of hydrogen from hydroxy groups, pore guests, or even nodes and the doping of carboxyl groups or their incorporation as a cation, which in some cases resulted in sensitivity to air exposure or retraction to unexposed adsorption sites. ,,,,,,, The observed gas uptake enhancements were moderate in comparison to the targets predicted by computational studies, in some cases ascribed ...…”

A Double-Walled Porous Metal–Organic Framework as a Highly Efficient Catalyst for Chemical Fixation of CO2 with Epoxides

“…Metal–organic frameworks (MOFs) are a flourishing family of organic–inorganic crystals with highly ordered and well-defined pores. − Benefiting of captivating architectures and widespread applications, MOFs have drawn extra attention from numerous chemists and materials scientists in recent decades. − Design and adjustment of bridging linkers and metal-involved junctions significantly accelerate the prosperous development of MOFs materials. − Therefore, neoteric MOFs are still animatedly pursued, resulting in a mass of endeavors by enhancing the assembled complexity to fabricate more mesmerizing architectures with superior performance. − One method to aggrandize the structural complexity with specific function is to construct multiwalled frameworks, but such investigations are less discussed and studied. Generally, most reported MOFs are the single-walled skeleton, generated by single layer linkers and metal nodes. − In contrast with single-wall materials, there is a significantly escalating curiousness in terms of double-walled structures with aesthetic configurations and various properties. − More critically, these double-walled materials possess a more fascinating quality and excellent stability because of the reinforced skeleton thickness to significantly increase their practical availability in a wide variety of applications. Normally, double-walled MOFs are able to be constructed by the assembly process of double-layered linkers and inorganic metal vertexes.…”

Synthesis and structure of a new fluorescent sensor based on Ba(II)‐multicarboxylate for detection of Cu2+ ion

“…Sun et al, which is highly sensitive to selective recognition of Cu 2 + and nitrobenzene by varying fluorescent effect. [8] Although fluorescent sensors have been reported for the identification of copper ions, [9,10] there are not many studies on the detection of copper ion using metal multicarboxylate coordination polymer (CP) modified by the Nheterocyclic and phenyl groups as fluorescent sensor.…”