Fabrication of Cu^(+) sites in confined spaces for adsorptive desulfurization by series connection double-solvent strategy

Cu^(+)-containing materials have shown various application prospects especially in adsorption and catalysis,because they are versatile,nontoxic and low cost.To date,developing a mild and controllable approach for the fabrication of Cu^(+) sites has remained a pronounced challenge.Herein,we report a series connection double-solvent strategy(SCDS) for fabricating Cu^(+)sites within MIL-101(Cr),a typical metal–organic framework.By employing the SCDS in which vitamin C is chosen as the environmentally benign reducing agent,Cu^(2+) was incorporated in the pores and then transformed to Cu^(+) in the confined spaces.Compared to the conventional high-temperature autoreduction method conducted under harsh environment(700°C for 12 h) with a low Cu^(+) yield(less than 50%),SCDS can selectively reduce Cu^(2+)to Cu^(+) at room temperature without generating any CuO.The resulting Cu^(+)modified MIL-101(Cr) exhibits good desulfurization performance in view of both uptake and recyclability.

Moirésuperlattice modulations in single-unit-cell FeTe films grown on NbSe_(2)single crystals

Interface can be a fertile ground for exotic quantum states,including topological superconductivity,Majorana mode,fractal quantum Hall effect,unconventional superconductivity,Mott insulator,etc.Here we grow single-unit-cell(1UC)FeTe film on NbSe_(2)single crystal by molecular beam epitaxy(MBE)and investigate the film in-situ with a home-made cryogenic scanning tunneling microscopy(STM)and non-contact atomic force microscopy(AFM)combined system.We find different stripe-like superlattice modulations on grown FeTe film with different misorientation angles with respect to NbSe_(2)substrate.We show that these stripe-like superlattice modulations can be understood as moirépattern forming between FeTe film and NbSe_(2)substrate.Our results indicate that the interface between Fe Te and NbSe2 is atomically sharp.By STM-AFM combined measurement,we suggest that the moirésuperlattice modulations have an electronic origin when the misorientation angle is relatively small(≤3°)and have structural relaxation when the misorientation angle is relatively large(≥10°).

Diastereoselective construction of structurally diverse 2,3-dihydroquinolin-4-one scaffolds via redox neutral cascade[1,7]-hydride transfer/cyclization

The pharmaceutically significant 2,3-dihydroquinolin-4-one scaffolds were constructed diastereoselectively and facilely via redox-neutral cascade Knoevengel condensation/[1,7]-hydride transfer/cyclization/transesterification in DCE from readily available methyl 2-aminobenzoacetate and diverse aldehydes,which features novel and highly valuable product structures.

Sex Differences in Electrophysiological Properties of Mouse Medial Preoptic Area Neurons Revealed by In Vitro Whole-cell Recordings

Despite extensive characterization of sex differences in the medial preoptic area(mPOA)of the hypothalamus,we know surprisingly little about whether or how male and female mPOA neurons differ electrophysiologically,especially in terms of neuronal firing and behavioral pattern generation.In this study,by performing whole-cell patch clamp recordings of the mPOA,we investigated the influences of sex,cell type,and gonadal hormones on the electrophysiological properties of mPOA neurons.Notably,we uncovered significant sex differences in input resistance(male>female)and in the percentage of neurons that displayed post-inhibitory rebound(male>female).Furthermore,we found that the current mediated by the T-type Ca^(2+)channel(IT),which is known to underlie post-inhibitory rebound,was indeed larger in male mPOA neurons.Thus,we have identified salient electrophysiological properties of mPOA neurons,namely IT and post-inhibitory rebound,that are male-biased and likely contribute to the sexually dimorphic display of behaviors.

Redox-triggered dearomative[5+1]annulation of indoles with O-alkyl ortho-oxybenzaldehydes for the synthesis of spirochromanes

The dearomative[5+1]annulation of 2-methylindoles with new five-membered synthons O-alkyl orthooxybenzaldehydes was developed unprecedentedly through cascade[1,5]-hydride transfer/dearomativecyclization in HFIP for the synthesis of spirochromanes bearing the 2-methylindolenine skeleton.Inaddition,the dual alkylation of the methyl group of 2-methylindolenines was achieved by sequential operation through the redox neutral[5+1]annulation with the second five-membered synthon N-alkylortho-aminobenzaldehyde,providing the chromane and tetrahydroquinoline fused spiroindolenines ingood yields.Furthermore,the auxiliary group that facilitates the hydride transfer process could be simplyremoved.

HFIP-mediated three-component imidization of electron-rich arenes with in situ formed spiroindolenines for facile construction of 2-arylspiroindolenines

The three-component reaction of o-aminobenzaldehydes with 5-hydroxyindole and electron-rich areneshas been achieved through HFIP-mediated cascade hydride transfer/dearomative cyclization/CDC-typeimidization at room temperature under air,providing a variety of 2-arylspiroindolenines carrying diversefunctional groups with moderate to good yields.The derivatizations of the products also were conductedto enhance the synthetic practicality of this protocol.