A family of homeotypic porous lanthanide metal−organic frameworks (MOFs), [Ln(btc)(H2O)]·guest (Nd (1), Sm (2), Eu (3), Gd (4), Tb (5), Ho (6), Er (7), and Yb (8); guest: DMF or H2O) was synthesized. The structures the as-synthesized compounds are tetragonal contain 1D channels with accessible ions. In situ single crystal X-ray diffraction shows that 1 undergoes a single-crystal to polycrystalline transformation from room temperature 180 °C. During release water molecules by evacuation...

A system involving ammonia borane (AB) confined in a metal-organic framework (JUC-32-Y) was synthesized. The hypothesis of nanoconfinement and metallic catalysis tested found to be effective for enhancing the hydrogen release kinetics preventing formation ammonia. AB JUC-32-Y started at temperature as low 50 degrees C. peak decomposition decreased 30 C (shifted 84 C). inside can 8.2 wt % 3 min 95 8.0 10.2 within 10 85

A lanthanide metal-organic framework, Dy(BTC)(H2O).DMF, with excellent thermal stability shows a high surface area, 655 m(2) g(-1), hydrogen and carbon dioxide storage capability, available Lewis-acid metal sites which could be anticipated to use in catalysis metal-site specific chemical sensor.

A series of microporous lanthanide metal-organic frameworks, Tb3(BDC)(4.5)(DMF)2(H2O)3.(DMF)(H2O) (1) and Ln3(BDC)(4.5)(DMF)2(H2O)3.(DMF)(C2H5OH)(0.5)(H2O)(0.5) [Ln = Dy (2), Ho (3), Er (4)], have been synthesized by the reaction metal ion (Ln3+) with 1,4-benzenedicarboxylic acid triethylenetetramine in a mixed solution N,N'-dimethylformamide (DMF), water, C(2)H(5)OH. X-ray diffraction analyses reveal that they are extremely similar structure crystallized triclinic space group P. An...

A series of microporous lanthanide metal−organic frameworks [Ln(BTC)(DMF)2·H2O, Ln = Tb (1), Dy (2), Ho (3), Er (4), Tm (5), Yb (6); DMF N,N'-dimethylformamide] with 4·4·4·6·6·8 topology, which is very common in the zeolite topologies, have been synthesized under mild conditions. The single-crystal X-ray diffraction analysis reveals that they exhibit same three-dimensional (3D) architecture and crystallize monoclinic symmetry space group C2/c. Organic inorganic four-connected nodes link each...

A series of rare earth coordination polymers, M(BTC)(DMF)(DMSO) (M = Tb (1), Ho (2), Er (3), Yb (4), Y (5)), with zeolite ABW topology have been synthesized under mild conditions. They exhibit the same three-dimensional (3D) architecture and crystallize in monoclinic symmetry space group P2(1)/n. Their structures are built up from inorganic organic 4-connected building units, whose vertex symbols 4.4.6.6.6.8. The units link to each other generate approximate 5 x 8 angstroms2 channels along...

Surface modification on Mg alloys is highly promising for their application in the field of bone repair. In this study, a new metal-organic framework/MgF₂ (Mg-MOF-74/MgF₂) composite coating was prepared surface AZ31B alloy via pre-treatment hydrofluoric acid and situ hydrothermal synthesis methods. The topography compact homogeneous, Mg-MOF-74 has good crystallinity. corrosion resistance investigated through Tafel polarization test immersion simulated body fluid at 37 °C. It found that...

Two crystalline large-sized porous organic cages (POCs) based on conical calix[4]arene (C4A) were designed and synthesized. The four-jaw C4A unit tends to follow the face-directed self-assembly law with planar triangular building blocks such as tris(4-aminophenyl)amine (TAPA) or 1,3,5-tris(4-aminophenyl)benzene (TAPB) generate a predictable cage stoichiometry of [6+8]. formation large is confirmed through their relative molecular mass measured using MALDI-TOF/TOF spectra. protonated ion...

A novel solid-phase microextraction (SPME) fiber was fabricated by a porous aromatic framework 48 (PAF-48)/gel hybrid material through sol–gel process. PAF-48 is organic (POF) that polymerized from 1,3,5-triphenylbenzene. The uniform pore structure, high surface area, continuous conjugate network, and hydrophobicity make expected to have special abilities absorb extract styrene as well some other harmful volatile compounds (VACs). PAF-48/gel-coated explored for the extraction of six VACs...

TPD-MS spectra (left) and solid-state ¹¹B NMR (right) of pristine AB, AB/MOF-5 AB/JUC-32-Y.

A series of hydrogen-bond organic frameworks (HOFs) (HOF-TCPB-x, x = 298, 333, 343, 353, and 373) with different crystalline structures were prepared by a temperature-dependent method. Among them, HOF-TCPB-373 shows stable duplex H-bonds 2-fold interpenetrating layered structure. exhibits high thermal, hydrolytic, acid, base stabilities. Its thermal decomposition temperature in the air is 450 °C, it can maintain original crystal structure after being immersed 6 M H2SO4, HCl, HNO3, 0.01 NaOH,...

A simple PTFE tubular microreactor based platform was successfully developed to conduct Sn(OTf)₂ catalyzed ε-caprolactone polymerization with better control of reaction conditions, faster polymerizations and narrower molecular weight distributions.

Abstract The competitive advantage of lianas over trees has been widely documented in studies their leaf functional traits across diverse habitats; however, the relative contribution root to superiority not yet evaluated. aim this study was explore traits, phylogenetic structure these and trait dimensions clarify why can outperform trees. We sampled 69 liana species from tropical temperate forests China measured nine key first‐order roots each species, including morphological, architectural,...

Abstract The calixarenes are ideal building blocks for constructing photocatalytic covalent organic frameworks (COFs), owing to their electron‐rich and bowl‐shaped π cavities that endow them with electron‐donating adsorption properties. However, the synthesis structural confirmation of COFs based on still challenging due flexibility conformational diversity. In this study, a calix[4]arene‐derived 2D COF is synthesized using 5,11,17,23‐tetrakis( p...

A hybrid of ammonia borane (AB) and a metal–organic framework (MOF), which contains unsaturated coordinated Tm3+, Tm(BTC) (BTC = 1,3,5-benzenetricarboxylic), was synthesized through the solvent-based impregnation method (named as AB@Tm(BTC)–CH3OH). Also two other materials AB@Tm(BTC)-milled AB@Tm2O3-milled were prepared by physical milling separately. TPD-MS results show that H2-release peaks three shift to lower temperature, 77, 79, 85 °C, respectively, compared with neat AB (114 150 °C)....