Syntheses, crystal structure, and photoelectric properties of two selenoantimonates A-Zn-Sb-Se (A = Rb and Cs).

Metal chalcogenides, as a new class of semiconductor materials, have a broad range of applications in synthetic chemistry due to their rich structures and excellent properties. We have synthesized two selenoantimonates AZnSbSe [A = Rb(1), Cs(2)] under solvothermal conditions in the visible region using a band gap optimization strategy with alkali metals as structure-directing agents. Compounds 1 and 2 have a two-dimensional layered structure consisting of charge-balanced Rb(1) or Cs(2) cations and [ZnSbSe] anions with novel 20-membered rings (20-MR) [ZnSbSe] with an aperture of 5.

Syntheses, crystal structure, and photoelectric properties of two Zn-based chalcogenidoantimonates Zn-Sb-Q (Q = S, Se).

Metal chalcogenides are a special class of semiconducting materials characterized by their rich structures and compositions, making them a promising option for a broad range of applications in the field of inorganic chemistry. However, the path forward is not without its challenges, notably in the realms of interface management and enhancing carrier concentration. To address these issues, we solvothermally synthesized two novel chalcogenidoantimonates [Zn(tren)]SbSe (1) [tren = tris (2-aminoethyl) amine] and [Zn(tepa)H]SbS (2) (tepa = tetraethylenepentamine) utilizing transition metal Zn by band gap optimization strategy in the visible region.

Strong Photocurrent Response of Selenoarsenates With Different Transition Metal Complexes as Structure-Directing Agents.

Four selenoarsenates with different transition-metal complexes [Co(tren)H]AsSe [tren = tris(2-aminoethyl)amine] (); [Ni(dien)](AsSe) (dien = diethylenetriamine) (); [Zn(tren)](AsSe) () and [Mn(tren)](AsSe) () were solvothermally synthesized in a mixed solvent of organic amine and alcohol solution. The compounds have pyramidal/tetrahedral structures (AsSe/AsSe), and contain transition metal (Co, Ni, Zn and Mn) complex that form distinct zero-dimensional (0-D) clusters. Arsenic atoms form a tetrahedron in compounds and ; consists of discrete tetrahedral (AsSe) and transition metal complex [Co(tren)]; is composed of an anion [AsSe] cluster and transition metal complex [Ni(dien)].

Regiodivergent CDC reactions of aromatic aldehydes with unactivated arenes controlled by transient directing strategy.

The regiodivergent catalytic dehydrogenative cross-coupling reactions at both sp and sp hybridized carbons of aromatic compounds are particularly challenging. Herein, we report the finding of transient directing group controlled regiodivergent C(sp)-C(sp) and C(sp)-C(sp) cross-coupling in the -methyl benzaldehyde frameworks. Catalyzed by palladium, using KSO or [F] reagents as by-standing oxidants and unactivated arenes as substrates/solvents, various benzyl benzaldehydes or phenyl benzaldehydes were prepared.

[3 + 2 + 1] Pyridine Skeleton Synthesis Using Acetonitrile as C4N1 Units and Solvent.

The first [3 + 2 + 1] methodology for pyridine skeleton synthesis via cascade carbopalladation/cyclization of acetonitrile, arylboronic acids, and aldehydes was developed. This reaction proceeds via six step tandem reaction sequences involving the carbopalladation reaction of acetonitrile, a nucleophilic addition, a condensation, an intramolecular Michael addition, cyclization, and aromatization. Delightfully, both palladium acetate and supported palladium nanoparticles catalyzed this reaction with similar catalytic performance.

The solvothermal synthesis and characterization of quaternary arsenic chalcogenides CsTMAsQ (TM = Hg, Cd; Q = S, Se) using Cs as a structure directing agent: from 1D anionic chains to 2D anionic layers.

Four new quaternary transition metal arsenic chalcogenide Cs-TM-As-Q compounds (TM = Hg, Cd; Q = S, Se) were synthesized using different mixed solvents. A 1,4-diaminobutane(1,4-dab)/water mixed solvent system was used to solvothermally synthesize the selenoarsenates CsTMAsSe (TM = Hg (1), Cd (2)). In 1, the eight-membered ring anion chain consists of trigonal-planar [HgSe] and trigonal-pyramid [AsSe].

Two Mercury Antimony Chalcogenides CsHgSbS and CsHgSbSe with Cesium Cations as Counterions.

Two novel layer structure compounds, CsHgSbS and CsHgSbSe, were synthesized in organic solvent under solvothermal conditions. The CsHgSbS is formed of [HgSbS] ribbons and S atoms by corner sharing. The CsHgSbSe is made up of [SbHgSe] ribbon and disorder trigonal-pyramidal SbSe by sharing μ-Se.

Transesterification of (hetero)aryl esters with phenols by an Earth-abundant metal catalyst.

Readily available and inexpensive Earth-abundant alkali metal species are used as efficient catalysts for the transesterification of aryl or heteroaryl esters with phenols which is a challenging and underdeveloped transformation. The simple conditions and the use of heterogeneous alkali metal catalyst make this protocol very environmentally friendly and practical. This reaction fills in the missing part in transesterification reaction of phenols and provides an efficient approach to aryl esters, which are widely used in the synthetic and pharmaceutical industry.

One pot synthesis of diarylfurans from aryl esters and PhI(OAc)2 via palladium-associated iodonium ylides.

The example of palladium-catalyzed intermolecular cyclization for the synthesis of various diarylfurans in which one of the aromatic rings originates from the phenolic part of the starting ester and the other one from PhI(OAc)2 has been reported. The reaction is carried out through two steps: the rearrangement of palladium-associated iodonium ylides to form o-iodo diaryl ether and then palladium catalyzed intramolecular direct arylation. This reaction can tolerate a variety of functional groups and is alternative or complementary to the previous methods for the synthesis of diarylfurans.

Energy-efficient green catalysis: supported gold nanoparticle-catalyzed aminolysis of esters with inert tertiary amines by C-O and C-N bond activations.

Catalyzed by supported gold nanoparticles, an aminolysis reaction between various aryl esters and inert tertiary amines by C-O and C-N bond activations has been developed for the selective synthesis of tertiary amides. Comparison studies indicated that the gold nanoparticles could perform energy-efficient green catalysis at room temperature, whereas Pd(OAc)2 could not.

Aminolysis of aryl ester using tertiary amine as amino donor via C-O and C-N bond activations.

An aminolysis reaction between various aryl esters and inert tertiary amines by C-O and C-N bond activations has been developed for the selective synthesis of a broad scope of tertiary amides under neutral and mild conditions. The mechanism may undergo the two key steps of oxidative addition of acyl C-O bond in parent ester and C-N bond cleavage of tertiary amine via an iminium-type intermediate.

K2Ag6Sn3S10: a quaternary sulfide composed of silver sulfide layers pillared by zigzag chains 1infinity[SnS3]2-.

A novel framework K(2)Ag(6)Sn(3)S(10) was synthesized solvothermally and characterized by single-crystal diffraction. The framework comprises [Ag(6)SnS(4)](2+) cationic layers pillared by [SnS(3)](2)(-) zigzag chains formed by vertex-sharing SnS(4) tetrahedra, and potassium ions are located in 1D channels. This compound crystallizes in the orthorhombic Pbcn space group with a = 24.

A solvothermal synthesis and the structure of K4Ag2Sn3S9 x 2KOH.

A novel layered K(4)Ag(2)Sn(3)S(9) x 2KOH was synthesized solvothermally. A mixture of ethanol and HSCH(2)CH(SH)CH(2)OH was used for the synthesis. The HSCH(2)CH(SH)CH(2)OH plays an important role and appears to serve as a mineralizer for the solvothermal reaction.