Interpenetrated In(III)-MOF with Multiple Recognition Sites for Single-Step Ethylene Purification.

An interpenetrated indium(III) metal-organic framework (MOF), , with a rarely reported tetrameric indium cluster is developed for streamlining ethylene purification from C2 gases. At 298 K, the adsorption capacities exhibited a complete reversal sequence of CH > CH > CH. Grand canonical Monte Carlo simulation indicated that the corners in a octahedral cage facilitated the CH/CH separation, while the pocket-like aperture situated between adjacent octahedral cages allows for full contact of CH.

Direct Ethylene Purification from a Four-Component Gas Mixture by a Microporous MOF with Aromatic Pore Surface and Carboxylates.

The single-step purification of ethylene (CH) from a mixture of carbon dioxide (CO), acetylene (CH), ethylene (CH), and ethane (CH) was achieved through MOF , where the aromatic pore surface and carboxylates selectively recognized CH and CO, respectively, resulting in a reversal of the adsorption orders for both gases (CH > CH and CO > CH). Breakthrough testing verified that the CH purification ability could be enhanced 2.6 times after adding impure CO.

Magnetic Anisotropy and Relaxation in Four-Coordinate Cobalt(II) Single-Ion Magnets with a [CoO] Core.

A mononuclear four-coordinate Co(II) complex with a [CoO] core, namely, PPN[Li(MeOH)][Co(L)] () (PPN = bis(phosphoranediyl)iminium; HL = perfluoropinacol), has been studied by X-ray crystallography, magnetic characterization, and theoretical calculations. This complex presents a severely distorted coordination geometry. The O-Co-O bite angle is 83.

Functionalization of the Octahydro-Binaphthol Skeleton: A Universal Strategy for Directly Constructing D-A Type Axially Chiral Biphenyl Luminescent Molecules.

D-A type axially chiral biphenyl luminescent molecules are directly constructed through ingenious functionalization of the octahydro-binaphthol skeleton without optical resolution. The circularly polarized organic light-emitting diodes based on them display remarkable circularly polarized electroluminescence emission, a high luminance of >10 000 cd m, a maximum external quantum efficiency of 6.6%, and an extremely low-efficiency roll-off.

Flow Channel with Recognition Corners in a Stable La-MOF for One-Step Ethylene Production.

Single-step ethylene (CH) production from acetylene (CH), ethylene (CH), and ethane (CH) mixtures was realized via the strategy of a flow channel with recognition corners in MOF . Both the uptake amounts and the enthalpy of adsorption () showed the same order of CH > CH > CH. Breakthrough testing also verified the above data and the CH purification ability.

Expanding MOF with Unexpanded Channel via Ketone Decorated Ligand for Ethylene Purification and Stability Enhancement.

The concept of an expanding MOF with unexpanded channel size was realized in MOF by the utilization of a ketone-functional-group-decorated semirigid ligand and pillar-layer platform. After this unusual expansion, the preferential CH adsorption was preserved via the unchanged pore size, and the functional group was inserted into the MOF. Interestingly, the CH uptake ability, CH selective adsorption ability, and structural stability were obviously enhanced due to the incorporation of the ketone functional group, which were further verified by isosteric heats of adsorption (), GCMC modeling, and breakthrough experiments.

Creating an Ethane Trap in a Ketone-Decorated MOF for One-Step Ethylene Separation from C2 Hydrocarbons.

One-step CH purification from a mixture of CH/CH/CH by physical adsorption separation was realized via creating an ethane trap in MOF by the utilization of a ketone-decorated semirigid ligand, which has further been verified by the breakthrough experiment, isosteric heats of adsorption (), and Grand Canonical Monte Carlo (GCMC) modeling.

Magnetic properties of two coordination isomeric cobalt(II) single-ion magnets.

Two isomeric Co(II) complexes with the same general molecular formula of [Co(napy)(NO)] (napy = 1,8-naphthyridine) have been synthesized. X-ray single crystal structural determination demonstrates that the two compounds exhibit highly irregular six- (1) and seven-coordinate (2) geometries, respectively. The magnetic measurements, X-band EPR data and theoretical calculations were thoroughly investigated.

Fine-Tuning MOFs with Amino Group for One-Step Ethylene Purification from the C2 Hydrocarbon Mixture.

Due to the similar kinetic diameters of CH, CH, and CH, one-step purification of CH from a ternary CH/CH/CH mixture by adsorption separation is still a challenge. Based on a CH-trapping platform and crystal engineering strategy, the N atom and amino group were introduced into and , respectively. Gas adsorption testing of showed that both the CH and CH uptake capacities and the CH/CH separation ability were boosted compared with the original platform.

Enhancing nitrogen removal of carbon-limited municipal wastewater in step-feed biofilm batch reactor through integration of anammox.

The biological nitrogen removal of municipal wastewater was successfully improved by integrating anammox in a step-feed sequencing biofilm batch reactor. Despite fluctuating influent carbon to nitrogen ratio (1.9-5.

Significantly Enhanced Carbon Dioxide Selective Adsorption via Gradual Acylamide Truncation in MOFs: Experimental and Theoretical Research.

A gradual amide truncation strategy was presented to tune the pore chemistry and CO capture performance of a series of tetracarboxylate-based Cu-MOFs. These MOFs exhibited a high density of Lewis basic sites (LBSs) and open metal sites and were prepared with the goal to enhance CO selective adsorption capacity. [Cu(L1)(HO)] (: NJU-Bai for Nanjing University Bai's group), [Cu(L2) (HO)] (), and [Cu(L)(HO)] (: NTUniv for Nantong University) were synthesized, and we observed that the CO adsorption capacities and MOF structures were impacted by subtle changes in ligands.

Pseudo-mono-axial ligand fields that support high energy barriers in triangular dodecahedral Dy(iii) single-ion magnets.

The synthesis of air-stable, high-performance single-molecule magnets (SMMs) is of great significance for their practical applications. Indeed, Ln complexes with high coordination numbers are satisfactorily air stable. However, such geometries easily produce spherical ligand fields that minimize magnetic anisotropy.

Axial Ligand as a Critical Factor for High-Performance Pentagonal Bipyramidal Dy(III) Single-Ion Magnets.

The choice of axial ligands is of great importance for the construction of high-performance Dy-based single-molecule magnets (SMMs). Here, combining axial ligands PhSiO (anion of triphenylsilanol) and 2,6-dichloro-4-nitro-PhO (the anion of 2,6-dichloro-4-nitrophenol) with a neutral macrocyclic ligand 2,14-dimethyl-3,6,10,13,19-pentaazabicyclo[13.3.

Formation of a Polar Flow Channel with Embedded Gas Recognition Pockets in a Yttrium-Based MOF for Enhanced CH/CH and CO Selective Adsorptions.

A polar flow channel with embedded gas recognition pockets was made in a 10-connected hexanuclear yttrium-based metal-organic frameworks (MOF) (NTUniv = Nantong University) by lowering the symmetry of the ligand, which showed high chemical stability and obviously enhanced gas adsorption selectivities.

MOF Pillaring Method: Ligand-to-Ligand and Axial-to-Axial Cross-Linking of "Paddlewheels".

By shortening the previous shortest tetracarboxylate ligand, the first ligand-to-ligand and axial-to-axial pillaring method was realized in the prototype MOF (NTUniv = Nantong University), which exhibit a rare (2,4,6)-connected net with a new topology and interesting gas adsorption performance.

Slow magnetic relaxation in dinuclear Co(III)-Co(II) complexes containing a five-coordinated Co(II) centre with easy-axis anisotropy.

Two air-stable Co(III)-Co(II) mixed-valence complexes of molecular formulas [CoCo(L)(DMAP)(CHCOO)]·HO·CHOH (1) and [CoCo(L)(4-Pyrrol) (CHCOO)]·0.5CHCl (2) (HL = 1,3-bis-(5-methyl pyrazole-3-carboxamide) propane; DMAP = 4-dimethylaminopyridine; and 4-Pyrrol = 4-pyrrolidinopyridine) were synthesized and characterized by single-crystal X-ray crystallography, high-field electron paramagnetic resonance (HFEPR) spectroscopy, and magnetic measurements. Both complexes possess one five-coordinated paramagnetic Co(II) ion and one six-coordinated Co(III) ion with octahedral geometry.

Magnetic anisotropy of two tetrahedral Co(II)-halide complexes with triphenylphosphine ligands.

Recently, the choice of ligand and geometric control of mononuclear complexes, which can affect the relaxation pathways and blocking temperature, have received wide attention in the field of single-ion magnets (SIMs). To find out the influence of the coordination environment on SIMs, two four-coordinate mononuclear Co(II) complexes [NEt][Co(PPh)X] (X = Cl, 1; Br, 2) have been synthesized and studied by X-ray single crystallography, magnetic measurements, high-frequency and -field EPR (HF-EPR) spectroscopy and theoretical calculations. Both complexes are in a cubic space group 3̄ (No.

Tuning the Equatorial Negative Charge in Hexagonal Bipyramidal Dysprosium(III) Single-Ion Magnets to Improve the Magnetic Behavior.

Taking advantage of the pentaethylene glycol (EO5) and deprotonation of EO5, a family of new structurally hexagonal bipyramidal Dy(III) complexes, [Dy(EO5)(2,6-dichloro-4-nitro-PhO)](2,6-dichloro-4-nitro-PhO) (), [Dy(EO5-BPh)(2,6-dichloro-4-nitro-PhO)] (), and [Dy(EO5-BPh)(2,6-dichloro-4-nitro-PhO)Cl] (), were controbllably synthesized and structurally characterized. Magnetic measurements show that complex is a zero-field SIM and has an observable hysteresis opening up to 4 K. Conversely, only under extra magnetic field is slow magnetic relaxation observed in and .

Finely Tuning Tridentate Carboxylic Acids for the Construction of Rod Scandium Metal-Organic Frameworks with High Chemical Stability and Selective Gas Adsorption.

By systematic ligand tuning for control of the secondary building units, the use of tridentate carboxylic acid to construct the rod scandium metal-organic framework (NTUniv = Nantong University) with high chemical stability and interesting selective gas adsorption was reported.

A Triazole Functionalized -Type Metal-Organic Framework with High Performance for CH Uptake and Selective CO Adsorption.

The metal-organic framework (MOF) (NTUniv = Nantong University) was assembled via utilizing click chemistry with densely decorated trizole units and exposed metal sites, which exhibited the best methane working ability (197 cm·cm from 100 to 5 bar and 177 cm·cm from 65 to 5 bar at 298 K), and the lowest CO of 22.8 kJ·mol in all triazole-MOFs at room temperature.

Advanced nitrogen removal from low C/N municipal wastewater by combining partial nitrification-anammox and endogenous partial denitrification-anammox (PN/A-EPD/A) process in a single-stage reactor.

In this study, an innovative partial nitrification-anammox (PN/A) and endogenous partial denitrification-anammox (EPD/A) process was developed in a single-stage integrated fixed film activated sludge sequencing batch reactor (IFAS-SBR) treating real municipal wastewater with C/N ratio below 3.2. Enhanced efficiency of total nitrogen (TN) removal reached 90.

Magnetic anisotropy in square pyramidal cobalt(II) complexes supported by a tetraazo macrocyclic ligand.

Two five-coordinate mononuclear Co(ii) complexes [Co(12-TMC)X][B(C6H5)4] (L = 1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecane (12-TMC), X = Cl- (1), Br- (2)) have been studied by X-ray single crystallography, magnetic measurements, high-frequency and -field EPR (HF-EPR) spectroscopy and theoretical calculations. Both complexes have a distorted square pyramidal geometry with the Co(ii) ion lying above the basal plane constrained by the rigid tetradentate macrocyclic ligand. In contrast to the reported five-coordinate Co(ii) complex [Co(12-TMC)(NCO)][B(C6H5)4] (3) exhibiting easy-axis anisotropy, an easy-plane magnetic anisotropy was found for 1 and 2via the analyses of the direct-current magnetic data and HF-EPR spectroscopy.

Structure, magnetic anisotropy and relaxation behavior of seven-coordinate Co(ii) single-ion magnets perturbed by counter-anions.

A series of mononuclear seven-coordinate Co(ii) complexes [CoII(BPA-TPA)](ClO4)2·H2O (2-ClO4), [CoII(BPA-TPA)](PF6)2 (3-PF6) and [CoII(BPA-TPA)](BPh4)2 (4-BPh4) have been synthesized based on the ligand 2,6-bis(bis(2-pyridylmethyl)amino)methylpyridine (BPA-TPA), and their structures have been characterized by single-crystal X-ray diffraction. All these complexes feature an intermediate coordination polyhedron between a capped trigonal prism and a capped octahedron, which is perturbed by the variation of the counter anions. Easy-plane magnetic anisotropies for all complexes were revealed via the analyses of the direct-current magnetic data and high-field electron paramagnetic resonance (HFEPR) spectra.

Effects of diet supplementation with rumen-protected betaine on carcass characteristics and fat deposition in growing lambs.

This study evaluated the effects of dietary rumen-protected betaine (RPB) supplementation on the fat deposition of lambs. Sixty Hu sheep were randomly divided into 5 groups. The lambs were fed a control diet (CON) or diets supplemented with 1.