It is extremely difficult to anticipate the structure and stereochemistry of a complex, particularly when ligand flexible metal node adopts diverse coordination numbers. When trivalent lanthanides (LnIII) enantiopure amino acid ligands are utilized as building blocks, self-assembly sometimes yields rare chiral polynuclear structures. In this study, an carboxyl-functionalized acid-based with C3 symmetry reacts lanthanum cations give homochiral porous cage, (Δ/Λ)12-PCC-57. The dodecanuclear...

Metal–organic framework (MOF)-templated materials, such as MOF-derived carbons (MOFdCs), are attractive materials for applications electrocatalysis and energy storage. Unfortunately, the black-box nature of their synthesis remains a barrier to implementation, it is difficult target specific structural features or properties in final material. In this work, we use well-established decomposition mechanism iron-MOF PCN-250 design two-step MOF calcination procedure that selectively generates two...

The laser absorptance of rough surfaces has been investigated by using Monte Carlo simulations based on three-dimensional (3D) ray tracing. influence multiple scattering, shadowing, and the Fresnel-equation angle dependence is discussed. 3D results are compared to previously published from a two-dimensional ray-tracing analysis different applications two models explained.

Elastically flexible crystals form an emerging class of materials that exhibit a range notable properties. The mechanism thermal expansion in bis(acetylacetonato)copper(II) is compared with the molecular motion induced by bending and it demonstrated two mechanisms are distinct. Upon bending, individual molecules within crystal structure reversibly rotate, while results predominantly increase intermolecular separations only minor changes to orientation through rotation.

We studied the volume-averaged chlorine (Cl) uptake into bulk region of aromatic polyamide active layer a reverse osmosis membrane upon exposure to free chlorine. Volume-averaged measurements were obtained using Rutherford backscattering spectrometry with samples prepared at range concentrations, times, and mixing, rinsing, pH conditions. Our complement previous studies that have quantified Cl surface (top ≈ 7 nm) advance mechanistic understanding by layers. results show is representative...

The volume-averaged amide link scission in the aromatic polyamide active layer of a reverse osmosis membrane upon exposure to free chlorine was quantified at variety times, concentrations, and pH rinsing conditions. results showed that (i) hydroxyl ions are needed for occur, (ii) hydroxide-induced is strong function hypochlorous acid, (iii) ratio between links broken atoms taken up increased with chlorination reached maximum ∼25%, (iv) disintegration occurs when high alkaline conditions,...

Molecular crystals displaying elastic flexibility have important applications in the fields of optoelectronics and nanophotonic technologies. Understanding mechanisms by which these materials bend is critical to design future incorporating properties. Based on known properties bis(acetylacetonato)copper(II), a series 14 aliphatic derivatives are synthesized crystallized. All those grew needle morphology display noticeable elasticity, with 1D chains π-stacked molecules parallel long metric...

Sophisticated chemical processes widely observed in biological cells require precise apportionment regulation of building units, which inspires researchers to develop tailorable architectures with controllable heterogeneity for replication, recognition and information storage. However, it remains a substantial challenge endow multivariate materials internal sequences apportionments. Herein, we introduce novel strategy manipulate the functional groups metal–organic frameworks (MTV-MOFs) by...

MOF-derived carbons are a class of porous material that combine the stability carbon with functionality and versatility MOFs. This review describes systematic design, characterization, application these materials.

A morphology engineering method was utilized to modulate the stacking modes of three nano-NU-901 materials, leading different separation abilities for isomers.

Metal–organic frameworks (MOFs) are emerging porous materials with highly tunable structures developed in the 1990s, while organometallic chemistry is of fundamental importance for catalytic transformation academic and industrial world many decades. Through years, has been incorporated into functional MOF construction diverse applications. Here, we will focus on how applied design modifications from linker-centric metal-cluster-centric perspectives, respectively. structural design, MOFs can...

The undeniable rise of metal–organic framework (MOF) technology has opened the possibilities these compounds for research and potential commercialization as alternative materials with a versatile number applications that range from catalysis to greenhouse gases capture. However, there are several factors constrain direct scale-up MOF laboratory industrial plant scale given insufficient knowledge about overall safety in synthesis process more than 6000 existing structures. This article...

A series of metal–organic frameworks (MOFs) (PCN-606-OH-TPDC, PCN-606-OMe-TPDC, PCN-606-OH-EDDB, and PCN-606-OMe-EDDB) are synthesized through linker installation onto open sites 8-connected Zr6 clusters in PCN-606-R (where R = −OH or −OMe) parent differing flexibilities. The two postsynthetically installed linear linkers possess slight differences length bulk, which result a noticeable difference the temperatures, reflective different thermodynamic barrier to incorporation into PCN-606-R....

This paper begins by describing the thermal inputs to cut zone when cutting mild steel with oxygen as assist gas. The investigation concentrates on chemical thermo-dynamics in and pays particular attention influence of dilution. A detailed experimental program has allowed authors theoretically clarify why process is highly sensitive small levels contamination jet.

Abstract Elastically flexible crystals form an emerging class of materials that exhibit a range notable properties. The mechanism thermal expansion in bis(acetylacetonato)copper(II) is compared with the molecular motion induced by bending and it demonstrated two mechanisms are distinct. Upon bending, individual molecules within crystal structure reversibly rotate, while results predominantly increase intermolecular separations only minor changes to orientation through rotation.

While metal-organic frameworks (MOFs) hold great promise for a wide range of industrial applications, the challenges handling fine crystalline powders have limited their adoption. MOF-polymer composites are one solution to this challenge, as or membranes substantially easier handle, however most existing low MOF loadings and suffer leaching due weak interactions between polymer. In work, we report continuous extrusion containing up 60 wt% commercially available MOFs successful small amounts...

While metal–organic frameworks (MOFs) hold great promise for a wide range of industrial applications, the challenges handling fine crystalline powders have limited their adoption. MOF–polymer composites are one solution to this challenge, as or membranes substantially easier handle; however, most existing low MOF loadings and suffer leaching due weak interactions between polymer. In work, we report continuous extrusion containing up 60 wt % commercially available MOFs successful small...

In this article the performance of a new type lens is compared with traditional meniscus lenses for CO2 laser cutting medium (>5 mm) section stainless steel. Dual Focus™ produce two focus spots, one above other. This optic was found to be capable higher speeds and better quality cuts. A phenomenological model presented which explains superior Focus lenses. The concentrates upon fact that during high speed metals, does not irradiate lower portion cut zone. part heated by melt flowing...