Recent development on the alkaline earth MOFs (AEMOFs)

Carbonate-based hyper-cross-linked polymers with pendant versatile electron-withdrawing functional groups for CO2adsorption and separation

“…To tackle this challenge, viable porous adsorbents with versatile architectures have been developed. Typically, these proposed materials can be divided into traditional specimens such as zeolites, 4 clay, 5 silica, 6 diatomite, 7 activated carbon, 8 carbon nanotubes, 9 and alkali carbonate, 10 and emerging ones such as metal-organic frameworks 11,12 and microporous organic polymers, 13,14 mainly including covalent organic building blocks, SEM and TEM of carbonate-based polymers, TGA analysis of obtained polymers, pore distribution and pore size distribution calculated using NLDFT methods of the prepared porous organic polymers, adsorption selectivity of CO 2 /N 2 and CO 2 /CH 4 for the polymers calculated by employing the Henry's law initial slope method according to their adsorption isotherms of CO 2 , N 2 and CH 4 at 273.15 K and 298.15 K, content of different elements for porous hyper-cross-linked polymers based on the elemental analysis and parent building blocks by theoretical calculation, the equation used for calculating the yield of the synthesized polymers, and the formula employed to determine the elemental content of the building-block molecules. See https://doi.org/10.1039/d2ta02774g frameworks, 15,16 conjugated microporous polymers, 17,18 polymers of intrinsic microporosity, 19,20 and hyper-cross-linked polymers.…”

“…To tackle this challenge, viable porous adsorbents with versatile architectures have been developed. Typically, these proposed materials can be divided into traditional specimens such as zeolites, 4 clay, 5 silica, 6 diatomite, 7 activated carbon, 8 carbon nanotubes, 9 and alkali carbonate, 10 and emerging ones such as metal–organic frameworks 11,12 and microporous organic polymers, 13,14 mainly including covalent organic frameworks, 15,16 conjugated microporous polymers, 17,18 polymers of intrinsic microporosity, 19,20 and hyper-cross-linked polymers. 21,22 Among these, HCPs have a wide range of available building blocks, 23–25 alternative catalysts, 26,27 and diverse synthetic techniques, 28,29 and can usually be readily prepared via Friedel–Crafts chemistry with high yield and simple operation procedures.…”

Ionothermal synthesis of calcium-based metal–organic frameworks in a deep eutectic solvent

“…While the vast majority of these materials is constructed using transition metal or rare earth cations, recent efforts have been devoted to the use of s-block ions 4-8 with a particular emphasis on alkaline earth metals such as Ca(II). [9][10] Indeed, it is an inexpensive naturally abundant element, has a lower toxicity and features low density, particularly favourable for gas sorption. These interesting characteristics of Ca-based MOFs come with a catch, since the coordination number and geometry of this cation are harder to predict and its oxophilicity makes it prone to coordination by water molecules at the expense of ligand binding, potentially leading to architectures of low dimensionality.…”

“…Therefore, the solvothermal approach is the preferred synthetic method over the hydrothermal one, to prevent competing coordination by water, although synthesis based on water/solvent combinations have been reported. [7][8][9][10] Surprisingly, to the best of our knowledge and according to a recent review, 10 there have been no reports of Ca-MOFs prepared following the ionothermal strategy, in spite of its appealing characteristics for such purposes. [11][12][13][14][15] This methodology is based on the use of an ionic environment to act as solvent and template for the formation of MOFs.…”

A series of naphthalenediimide-based metal–organic frameworks: synthesis, photochromism and inkless and erasable printing

“…8,9 As a new class of metal-organic materials, coordination polymers (CPs), especially metal-organic frameworks (MOFs) are well-known for their high designability and porous structures, which play important roles in numerous applications, such as gas storage, adsorption, separation, fluorescence sensing, etc. [10][11][12][13] Photochromic CPs/MOFs can be assembled by introducing functional photochromic components (organic ligands, such as viologen, naphthalimides, and their derivatives). [14][15][16][17][18] Compared with conventional photochromic materials, three-dimensional (3D) extended networks prevent the accumulation of photoactive organic groups to some extent, effectively prolonging the retention time of photo-generated radicals.…”