Heteroatom doped porous carbon flakes were prepared via carbonization of Chinese human hair fibers and employed for high-performance supercapacitor electrode materials. The morphology chemical composition the resultant materials characterized by electron microscopy (EM), energy-dispersive X-ray spectroscopy (EDX), photoelectron (XPS) measurements. Human carbonized at 800 °C exhibited high charge storage capacity with a specific capacitance 340 F g−1 in 6 M KOH current density 1 A good...

Objective: The authors used resting-state functional connectivity MRI to evaluate brain networks in patients with refractory and nonrefractory major depressive disorder. Method: In a cross-sectional study, 28 depression, 32 48 healthy comparison subjects underwent scanning using gradient-echo echo-planar imaging sequence on 3-T MR system. Thirteen regions of interest that have been identified the literature as relevant mood regulation were selected seed areas. A reference time series was...

We report an effective and simplified procedure for the synthesis of cross-linked alkaline anion-exchange membranes (AEMs). AEMs based on imidazolium-type ionic liquids (ILs) were prepared via in situ cross-linking 1-vinyl-3-methylimidazolium iodide ([VMIm][I]) with styrene acrylonitrile, followed by hydroxide ions. The resulting copolymer exhibit high ion conductivity (above 10−2 S/cm at room temperature) good mechanical properties. thermal stability produced is comparable to that...

Alkaline imidazolium-type ionic liquids (ILs) and quaternary ammonium salt functionalized alkaline anion-exchange membranes (AEMs), with the same ion exchange capacity (IEC), were synthesized via in situ cross-linking of styrene, acrylonitrile, 1-methyl-3-(4-vinylbenzyl)imidazolium chloride ([MVBIm][Cl]), N,N,N-trimethyl-1-(4-vinylphenyl) methanaminium ([TMVPMA][Cl]), respectively. The water uptake, swelling ratio, conductivity, stability resultant cross-linked copolymer investigated. Both...

Abstract The large majority of structural MRI studies major depressive disorder (MDD) investigated volumetric changes in chronic medicated patients whom course illness and treatment effects may impact anatomic measurements. Further, few studies, separate measurements cortical thickness surface area have been performed that reflect different neurobiological processes regulated by genetic mechanisms. In the present study, we both first-episode, treatment-naïve, mid-life MDD to elucidate core...

Proton-conducting membranes were prepared by polymerization of microemulsions consisting surfactant-stabilized protic ionic liquid (PIL) nanodomains dispersed in a polymerizable oil, mixture styrene and acrylonitrile. The obtained PIL-based polymer composite are transparent flexible even though the resulting vinyl polymers immiscible with PIL cores. This type have quite good thermal stability, chemical tunability, mechanical properties. Under nonhumidifying conditions, show conductivity up...

Imidazolium cations with butyl groups at various substitution positions (N1-, C2-, and N3-), 1-butyl-2,3-dimethylimidazolium ([N1-BDMIm](+)), 2-butyl-1,3-dimethylimidazolium ([C2-BDMIm](+)), 3-butyl-1,2-dimethylimidazolium ([N3-BDMIm](+)), were synthesized. Quantitative (1)H NMR spectra density functional theory calculation applied to investigate the chemical stability of imidazolium in alkaline solutions. The results suggested that was drastically affected by C2-substitution groups....

Photochemically stable poly(ionic liquids) (poly(ILs)) including poly(1-butyl-3-vinylimidazolium bromide) ([PBVIm][Br]) and bis(trifluoromethanesulfonyl)imide) ([PBVIm][TFSI]) were synthesized dissolved in the room temperature ionic liquids (ILs) to form quasi-solid-state electrolytes for dye-sensitized solar cells (DSSCs), without using any volatile organic solvent. DSSCs based on IL/[PBVIm][TFSI] gel electrolyte yielded a power conversion efficiency of 4.4% under simulated air mass 1.5...

An enantioselective Mannich-type reaction of 3-butynol and nitrones is described, which affords dihydrofuran-3-ones in good yields with excellent enantioselectivities. The initiated by gold-catalyzed alkyne oxidation modification the resulting gold carbene species a tethered hydroxy group to form enolate species; terminates an addition assistance chiral phosphoric acid (CPA) hydrogen bonding. This novel pattern transformation involving chemical bond cleavage, fragment reassembly process,...

Organic ionic plastic crystal, 1-ethyl-1-methyl pyrrolidinium iodide (P12I), is employed as the solid-state electrolytes for dye-sensitized solar cells. The fabricated devices show an overall power conversion efficiency of ∼5.8% under AM 1.5 radiation (50 mW/cm2) and excellent long-term stability at 80 °C.

An unprecedented gold-catalyzed bicyclization reaction of diaryl alkynes has been developed for the synthesis indoles in good to high yields. Mechanistically, this alkyne bifunctionalization transformation was terminated by a stepwise formal X-H insertion furnish corresponding polycyclic-frameworks with structural diversity, and key intermediate 3 H-indole isolated characterized first time. In addition, further these generated tetracyclic-indoles PCC as oxidant provided straightforward...

A copper-catalyzed novel carbene/alkyne metathesis cascade reaction with alkyne-tethered diazo compounds is described. The whole transformation features a dual-functionalization of alkyne to install one C═N and C═C bond on each carbon azide groups, respectively, in reaction, which represents practical synthetic alternative the multisubstituted 4-carboxyl quinoline derivatives most them high excellent yields.

In catalytic asymmetric reactions, the formation of chiral molecules generally relies on a direct chirality transfer (point or axial chirality) from catalyst to products in stereo-determining step. Herein, we disclose transient-axial-chirality strategy achieve reaction. This method transferring point dirhodium carbene intermediate with chirality, namely since this species is an The transient then transferred final product by C(sp

Abstract Background Major depressive disorder (MDD) tends to emerge during adolescence; however, neurobiological research in adolescents has lagged behind that adults. This study aimed characterize gray matter (GM) structural alterations with MDD using comprehensive morphological analyses. Methods included 93 adolescent patients and 77 healthy controls. Voxel-based morphometry (VBM), deformation-based (DBM), surface-based (SBM) methods were used analyze GM patients. Sex-by-group age-by-group...

Poly(2-acrylamido-2-methylpropanesulfonic acid) (PAMPS) has been used for the preparation of proton exchange membranes (PEMs) due to superior ability sulfonic acid groups originated from AMPS in supporting conduction. Since PAMPS is water-swollen or even soluble water, it necessary copolymerize with proper monomer oils control swelling and mechanical properties membranes. However, as a water-soluble monomer, generally immiscible hydrophobic oils. To overcome this obstacle, was converted an...

Polypyrrole nanotubes (PPyNTs)/Pt nanoparticle hybrids were synthesized by using covalently attached imidazolium-type ionic liquids (ILs) as linkers. The resultant Pt/ILs/PPyNTs exhibited high electrocatalytic activity in oxidation of methanol.

Cognitive performance relies on the coordination of large-scale networks brain regions that are not only temporally correlated during different tasks, but also show highly spontaneous activity a task-free state. Both task-related and network has been associated with individual differences in cognitive performance. Therefore, we aimed to examine influence expertise four task performance: default mode (DMN) three other (central-executive network, dorsal attention salience network). During fMRI...

Electroactive supramolecular gels with multistimuli responsiveness were fabricated through host-guest interactions between a host polymer containing β-cyclodextrin (CD) and an ionic liquid (IL) type asymmetric gemini guest, which contains both ferrocene (Fc) bis(trifluoromethyl-sulfonyl)imide (TFSI-) as the respective α- ω-guest groups. Owing to multiple stimuli-responsiveness of interactions, reversible sol-gel phase transition could be triggered by various stimuli, including temperature,...

A polymerizable ionic liquid (IL), 1-butyl-3-vinylimidazolium bromide ([Bvim][Br]), was synthesized and copolymerized with acrylonitrile to produce poly(1-butyl-3-vinylimidazolium bromide-co-acrylonitrile) (PBA). Carbonization of PBA yielded carbon materials. The yield, nitrogen content nanostructure materials are highly dependent on the IL molar ratio in co-polymers. anion-exchanged Pt precursor (H2PtCl6) form [PBA][PtCl6]. [PBA][PtCl6] produced nitrogen-doped carbon–Pt nanohybrids, which...

Plastic 1–14 pH indicator strips were prepared via cross-linking of an ionic liquid (IL) monomer, 1-butyl-3-vinylimidazolium bromide ([Bvim][Br]), with acrylonitrile, and followed by anion-exchange anionic dyes. The resultant exhibit enhanced pH-responsive colour changes robust pH-response reversibility in both aqueous organic solutions.