An unprecedented dynamic porous metal–organic framework assembled from fivefold interlocked closed nanotubes with selective gas adsorption behaviors

Abstract

An unprecedented 3D dynamic porous metal-organic framework assembled from fivefold interlocked closed nanotubes has been constructed, which exhibits highly selective adsorption of CO(2) over N(2) and H(2), as well as stepwise and hysteretic behaviors.

Metal–organic framework derived Fe2O3@NiCo2O4 porous nanocages as anode materials for Li-ion batteries

“…Metal-organic frameworks (MOFs) with large surface areas, adjustable pore size and diverse skeletal structures are synthesized by assembling metal ions or metal clusters with organic ligands through coordination bonds. MOFs are regarded as multifunctional materials and are promising in many applications such as catalysis, [24][25][26] gas storage or separation, [27][28][29] sensoring, [30][31][32] and energy storage. [33][34][35] Of all the MOFs, core-shell MOFs are particularly interesting and draw a great deal of attention.…”

Moisture-Stable Zn(II) Metal–Organic Framework as a Multifunctional Platform for Highly Efficient CO2 Capture and Nitro Pollutant Vapor Detection

“…Such an unusual sorption behavior of 1a should be attributed to the larger quadrupole moment of CO 2 (−1.4 × 10 −39 cm 2 ) than N 2 (0 cm 2 ), which can impose an interaction on the framework and induce a framework expansion. [38][39][40][41] Inspired by its permanent microporous feature and uncoordinated N atoms functionalized pores, we investigated its potential applications in CO 2 capture and separation. The N 2 , CO 2 , and CH 4 sorption isotherms of 1a were collected around room temperature.…”

Fluorogenic Detection of Sulfite in Water by Using Copper(II) Azacyclam Complexes

“…Similarly to cyclam analogues, azacyclam complexes exhibit both a strong thermodynamic stability and inertness toward ligand dissociation [ 55 , 56 ]. Metal complexes of azacyclam and of other polyaza-macrocyclic ligands have been extensively investigated over the last years, finding application in different areas, including, for instance, metal-organic-framework (MOF) design [ 57 , 58 , 59 , 60 , 61 ], solid-state conducting materials [ 62 , 63 ], electrocatalysis [ 64 , 65 ], and chemosensors and optical probes [ 66 , 67 ].…”

“…Azacyclam complexes can be easily synthesized through a template reaction [ 68 ] involving the acyclic ligand 2.3.2-tet (1,9-diamino-3,7-diazanonane), a transition metal ion (usually Ni 2+ or Cu 2+ ), formaldehyde, and a “locking fragment” ( LF ), which can be a primary amine [ 59 , 60 , 69 , 70 , 71 , 72 , 73 ], an amide [ 55 , 74 , 75 , 76 ], or sulfonamide [ 55 , 74 , 77 , 78 ], as well as a urea derivative [ 79 ]. LF s behave as formal diprotic acids and react by firmly locking the tetraamine chain around the metal ion, thus yielding the macrocyclic structure.…”