Although numerous porous adsorbents have been investigated for NH3 capture applications, these materials often exhibit insufficient uptake, low affinity at the ppm level, and poor chemical stability against wet conditions. The properties of M2 (dobpdc) complexes (M=Mg2+ , Mn2+ Co2+ Ni2+ Zn2+ ; dobpdc4- =4,4-dioxidobiphenyl-3,3-dicarboxylate) that contain open metal sites is presented. uptake Mg2 298 K was 23.9 mmol g-1 1 bar 8.25 570 ppm, which are record high capacities both pressures among...

Although diamine-appended metal-organic framework (MOF) adsorbents exhibit excellent CO2 adsorption performance, a continuous decrease in long-term capacity during repeated wet cycles remains formidable challenge for practical applications. Herein, we present the fabrication of Mg2(dobpdc)-alumina beads (een-MOF/Al-Si-Cx; een = N-ethylethylenediamine; x number carbon atoms attached to epoxide) coated with hydrophobic silanes and alkyl epoxides. The reaction epoxides diamines portal pore...

Ammonia is a promising energy vector that can store the high density of hydrogen. For this reason, numerous adsorbents have been investigated as ammonia storage materials, but with gravimetric/volumetric capacity be simultaneously regenerated in an energy-efficient manner remain underdeveloped, which hampers their practical implementation. Herein, we report Ni_acryl_TMA (TMA = thiomallic acid), acidic group-functionalized metal-organic framework prepared via successive postsynthetic...

Reactive oxygen species (ROS) are one of the most useful chemicals in photo-therapeutic and catalytic applications. In order to effectively generate ROS, role light-absorbing photosensitizers or activators for pre-ROS sources like peroxymonosulfate (PMS) is significantly essential. Although metal-based ROS-generating materials have been widely utilized due affordable heavy atom effect viable sites, potential toxicity leached metal ions can be sometimes an undesirable hazard humans...

Abstract The development of adsorbents for Kr and Xe separation is essential to meet industrial demands energy conservation. Although a number previous studies have focused on Xe‐selective adsorbents, stimuli‐responsive Xe/Kr‐selective still remain underdeveloped. Herein, Hofmann‐type framework Co(DABCO)[Ni(CN) 4 ] (referred as CoNi‐DAB ; DABCO = 1,4‐diazabicyclo[2,2,2]octane) that provides temperature‐dependent switchable Xe/Kr performance reported. showed high Kr/Xe (0.8/0.2) selectivity...

Abstract Anion exchange membrane fuel cells (AEMFCs) offer several advantages over proton cells, such as the use of a non‐precious metal catalyst, but these suffer from various issues related to OH – ‐conducting electrolytes, including low conductivity and formation K 2 CO 3 salt. These need be resolved for widespread AEMFCs. Recently, many studies have focused on developing excellent ion‐conductive electrolytes using porous materials based metal–organic covalent organic frameworks. However,...

Among the various metal–organic framework (MOF) adsorbents, diamine-functionalized Mg2(dobpdc) (dobpdc4– = 4,4-dioxidobiphenyl-3,3′-dicarboxylate) shows remarkable carbon dioxide removal performance. However, applying in practical applications is premature because it persistent performance degradation under real flue gas conditions containing water vapor owing to diamine loss during wet cycles. To address this issue, we employed hydrophobic carbonate compounds protect groups een-Mg2(dobpdc)...

Direct air capture (DAC) shows considerable promise for the effective removal of CO

In reticular chemistry, topology is a powerful concept for defining the structures of covalent organic frameworks (COFs). However, due to lack diversity in symmetry and reaction stoichiometry monomers, only 5% two-dimensional topologies have been reported be COFs. To overcome limitations COF connectivity pursue novel structures, two aminal-linked COFs, KUF-2 KUF-3, are prepared, with dumbbell-shaped secondary building units. Linear dialdehydes piperazine condensed at ratio 1:2 construct an...

A ultramicroporous metal–organic framework Ni(AIN)2 exhibited ideal performance of both high Xe/Kr selectivity and Xe adsorption at low pressures. The amino groups the AIN ligands form intra- inter-net hydrogen bonds, imparting structural stability even under wet conditions.

Abstract Although NH 3 is damaging to human health and the environment, a smart synthetic route toward adsorbents with controllable adsorption desorption properties at ultralow concentrations remains unexplored. Herein, double postsynthetically modified porous organic polymers, obtained via post‐sulfonation post‐alkylation, are reported. The sulfonated adsorbent, 1S , exhibits record‐high capacity (4.03 mmol g −1 ) ≈500 ppm. Notably, polymer can capture even ppb concentration level....

Abstract Although numerous porous adsorbents have been investigated for NH 3 capture applications, these materials often exhibit insufficient uptake, low affinity at the ppm level, and poor chemical stability against wet conditions. The properties of M 2 (dobpdc) complexes (M=Mg 2+ , Mn Co Ni Zn ; dobpdc 4− =4,4‐dioxidobiphenyl‐3,3‐dicarboxylate) that contain open metal sites is presented. uptake Mg 298 K was 23.9 mmol g −1 1 bar 8.25 570 ppm, which are record high capacities both pressures...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric relaxation studies of ion motions in electrolyte-containing perfluorosulfonate ionomers. 2. Sodium acetate, potassium chloride, and iodide systemsK. A. Mauritz H. YunCite this: Macromolecules 1988, 21, 9, 2738–2743Publication Date (Print):September 1, 1988Publication History Published online1 May 2002Published inissue 1 September 1988https://doi.org/10.1021/ma00187a016Request reuse permissionsArticle Views137Altmetric-Citations15LEARN...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric relaxation studies of ion motions in electrolyte-containing perfluorosulfonate ionomers. 3. Zinc sulfate and calcium chloride systemsK. A. Mauritz H. YunCite this: Macromolecules 1989, 22, 1, 220–225Publication Date (Print):January 1989Publication History Published online1 May 2002Published inissue 1 January 1989https://pubs.acs.org/doi/10.1021/ma00191a042https://doi.org/10.1021/ma00191a042research-articleACS PublicationsRequest reuse...

We proposed a new strategy to maximize the density of acidic groups by modulating electronic effects substituents for high-performance proton conductors. The conductivity sulfonated 1-MeL40-S with methyl group corresponds 2.29×10-1 S cm-1 at 80 °C and 90 % relative humidity, remarkably an 22100-fold enhancement over nonsulfonated 1-MeL40. maintains long-term one month. confirm that this synthetic method is generalized extended version POPs, 2-MeL40-S 3-MeL40-S. In particular, conductivities...

Although porous organic polymer (POP) has been explored as a promising photosensitizer, its powdered form makes it unfavorable for practical applications. Here, we demonstrate protocol fabricating imidazoline-based POP composites using fabric and sponge substrates. This fabrication is limited to POPs with aldehyde containing building blocks. For complete details on the use execution of this protocol, please refer Kim et al. (2022).

Purifying C2H4 from a ternary C2H2/C2H4/C2H6 mixture poses substantial industrial challenge due to their close physical and chemical properties. In this study, we introduce an innovative design approach regulate optimize the nitration degree of hypercrosslinked polymer achieve targeted separation performance. We synthesized porous organic (HCP) using solvent knitting method carried out its postsynthetic nitration, resulting in HCP-NO2-1 HCP-NO2-2 with different degrees. Notably, adsorption...

The potential to produce high-purity C

Abstract We proposed a new strategy to maximize the density of acidic groups by modulating electronic effects substituents for high‐performance proton conductors. The conductivity sulfonated 1‐MeL40‐S with methyl group corresponds 2.29×10 −1 S cm at 80 °C and 90 % relative humidity, remarkably an 22100‐fold enhancement over nonsulfonated 1‐MeL40 . maintains long‐term one month. confirm that this synthetic method is generalized extended version POPs, 2‐MeL40‐S 3‐MeL40‐S In particular,...

Poröse NH3-Adsorbentien sind durch ungenügende NH3-Aufnahme, niedrige NH3-Affinitäten bei niedrigem Druck und geringe chemische Stabilität unter feuchten Bedingungen charakterisiert. C. S. Hong Mitarbeiter beschreiben in ihrem Forschungsartikel auf 22720 ein Mg-basiertes Metall-organisches Gerüstmaterial mit offenen Lewis-Metallzentren entlang hexagonaler Kanäle, das rekordverdächtige NH3-Kapazitäten niedrigen hohen Drücken sowie eine bemerkenswerte selbst gegenüber feuchtem NH3 zeigt.