Hydrogenolysis of the half-sandwich penta-arylcyclopentadienyl-supported heavy alkaline-earth-metal alkyl complexes (CpAr )Ae[CH(SiMe3 )2 ](S) =C5 Ar5 , Ar=3,5-i Pr2 -C6 H3; S=THF or DABCO) in hexane afforded calcium, strontium, and barium metal-hydride as same dimers [(CpAr )Ae(μ-H)(S)]2 (Ae=Ca, S=THF, 2-Ca; Ae=Sr, Ba, S=DABCO, 4-Ae), which were characterized by NMR spectroscopy single-crystal X-ray analysis. 2-Ca, 4-Sr, 4-Ba catalyzed alkene hydrogenation under mild conditions (30 °C, 6...

Abstract The design and synthesis of proton exchange membranes (PEMs) with controllable microstructure sulfonation degree play a crucial role in enhancing their performance expanding application. In this study, the disulfonic acid monomer is designed prepared to synthesize comb‐like PEMs ion capacity. results show that side chain structure more concentrated sulfonic groups facilitate aggregation polymer, improve microphase separation morphology PEMs, increase ionic conductivity. conductivity...

This study obtained solution-tractable anion-selective membranes with intrinsic porous and highly ionic conductive capabilities by a convenient route. We used the coplanar structure of 9,9-dimethylxanthene to construct rigid twisted microporous all-carbon skeleton PDI up 363.4 m2 g–1 Brunauer–Emmett–Teller surface, pore was filled quaternary ammonium salt containing long flexible alkyl chains, which produced an efficient means OH– transport. The conductivity resulting polymer (QPDI-100) is...

The monomeric actinide dihydrido complex [(CpAr*)(Cp*)ThH2(THF)] (2) bearing the super-bulky penta-arylcyclopentadienyl (CpAr* = C5Ar*5, Ar* 3,5-tBu2-C6H3) and pentamethylcyclopentadienyl (Cp* C5Me5) ligands was obtained for first time. Complex 2 underwent unique Th-H addition reactions with various unsaturated compounds to afford corresponding five-membered metallacycles, including example of metallacyclopentyne [(CpAr*)(Cp*)Th(PhCH-C[triple bond, length as m-dash]C-CHPh)] (4).

Abstract Hydrogenolysis of the half‐sandwich penta‐arylcyclopentadienyl‐supported heavy alkaline‐earth‐metal alkyl complexes (Cp Ar )Ae[CH(SiMe 3 ) 2 ](S) =C 5 , Ar=3,5‐ i Pr ‐C 6 H 3; S=THF or DABCO) in hexane afforded calcium, strontium, and barium metal–hydride as same dimers [(Cp )Ae( μ ‐H)(S)] (Ae=Ca, S=THF, 2‐Ca ; Ae=Sr, Ba, S=DABCO, 4‐Ae ), which were characterized by NMR spectroscopy single‐crystal X‐ray analysis. 4‐Sr 4‐Ba catalyzed alkene hydrogenation under mild conditions (30 °C,...

Cross-linked porous organic polymer membranes were fabricated via interfacial azo-coupling polymerization and demonstrated to be a high-performance membrane catalytic reactor with flux of 27.3 t m⁻² day⁻¹ for reducing the nitrophenols.

Bimetallic scandium complex [(Cp^Ar5)Sc(H)(μ-OC₄H₉)]₂ (Cp^Ar5 = C₅Ar₅, Ar 3,5-ⁱPr₂-C₆H₃) (<bold>2</bold>) with two terminal hydrido ligands, and lanthanum hydride [(Cp^Ar5)La(μ-H)]₂ (<bold>4</bold>) bearing the reduced Cp^Ar5 ligand were obtained.

A novel SPES-NH2–GA-Nafion® composite membrane with higher proton conductivity and lower methanol permeability was fabricated by covalent crosslinking layer-by-layer self-assembly of an unbalanced charged polyampholyte (SPES-NH2) glutaraldehyde (GA) controllable free sulfonic acid content.

Hydrogenolysis of alkyl-substituted cyclopentadienyl (CpR ) ligated thorium tribenzyl complexes [(CpR )Th(p-CH2 -C6 H4 -Me)3 ] (1-6) afforded the first examples molecular trihydrido )Th(μ-H)3 ]n =C5 H2 (t Bu)3 or C5 (SiMe3 )3 , n=5; Me4 SiMe3 n=6; Me5 n=7; H, n=8; 7-10 and 12) [(Cp# )12 Th13 H40 (Cp# ; 13). The nuclearity metal hydride clusters depends on steric profile ligands. hydrogenolysis intermediate, tetra-nuclear octahydrido dibenzylidene complex [(Cpttt )Th(μ-H)2 ]4 (μ-p-CH-C6 -Me)2...

A series of mono-anionic non-carbocyclic ligands, including bidentate benzamidinate [PhC(NDipp)2] (Dipp = C6H3-2,6-iPr2), iminophosphinamide [Ph2P(NDipp)2] and phosphinoamide [Ph2PNDipp], tridentate hydrotris(3,5-dimethyl-1-pyrazolyl)borate (TpMe2) were used to stabilize the corresponding thorium(iv) trialkyl complexes [PhC(NDipp)2]Th(CH2SiMe3)3 (1), [Ph2P(NDipp)2]Th(CH2SiMe3)3 (2), [Ph2P(NDipp)]Th(p-CH2-C6H4-Me)3 (3) (TpMe2)Th(CH2SiMe3)3 (4), which characterized by NMR spectroscopy...

Abstract Hydrogenolysis of alkyl‐substituted cyclopentadienyl (Cp R ) ligated thorium tribenzyl complexes [(Cp )Th(p‐CH 2 ‐C 6 H 4 ‐Me) 3 ] ( 1 – afforded the first examples molecular trihydrido )Th(μ‐H) n =C 5 t Bu) or C (SiMe , n=5; Me SiMe n=6; n=7; H, n=8; 7 10 and 12 # Th 13 40 ; ). The nuclearity metal hydride clusters depends on steric profile ligands. hydrogenolysis intermediate, tetra‐nuclear octahydrido dibenzylidene complex ttt (μ‐p‐CH‐C 11 was also isolated. All were...

Sulfonated polyarylene membranes are demonstrated to be efficient as proton exchange (PEMs) for membrane fuel cells (PEMFCs) in clean energy conversion systems. In this study, we design and synthesis a series of sulfonated with all-carbon backbones densely pendant groups, which can prepared by copolymerization 1,3-Disulfonic acid benzaldehyde, 1,1,1-trifluoroacetone biphenyl under superacid-catalyzed conditions. Rigid, hydrophobic backbone hydrophilic side chains make the form good...

By examining the structural patterns of imine monomers engaged in polycondensation, a series poly(ether ether ketone) precursor polymers (PEEKi-N-acyl) modified with N-acyl Imine groups were designed this work. Contrary to (PEEK), these have superior solubility, enabling their production solution and processing membrane components. The components' substance could undergo an hydrolysis reaction acidic environment, turning them back into PEEK giving solvent resistance. In addition, homogeneous...

The mechanical properties of the main hydraulic cylinder, slider, and piston rod impact overall performance in press slow compression process. In this paper, a three beam four-column was regarded as research object, working principle stress characteristics important components analyzed, mechanics model set up, thus established optimization scheme slider rod; finite element up by using ANSYS software. results show that maximum pressure cylinder is 36.0032 MPa liquid value 25 MPa;when work at...

The high proton conductivity, good dimensional stability and acceptable mechanical properties of exchange membranes (PEMs) are important indicators for the practical application membrane materials in clean energy storage conversion systems. In this work, we prepared SPDI-x, a material with rigid twisted main chains intrinsic channels by an efficient simple route. It combined skeleton flexible sulfonic acid side chain to achieve conductivity limited swelling rate. SPDI-x at 80 °C was 233 mS...