Photo-on-Demand One-Pot Synthesis of Carbonate Esters from Tetrachloroethylene.

The present study reports a novel one-pot synthesis of carbonate esters with photo-oxidized tetrachloroethylene (TCE). Acyclic and cyclic alkyl carbonate esters could be synthesized through base-promoted condensation reactions of alcohols with the photo-oxidized TCE that was prepared by irradiation with UV-C or visible light under O or O/Cl (∼4%) bubbling, respectively. Cyclic carbonate esters could also be synthesized from a solution of TCE and the ethylene glycol derivative by irradiation of UV-C light under O bubbling.

Photo-on-Demand In Situ Synthesis of N-Substituted Trichloroacetamides with Tetrachloroethylene and Their Conversions to Ureas, Carbamates, and Polyurethanes.

N-substituted trichloroacetamides (NTCAs), which serve as blocked isocyanates, were synthesized in ∼97% yields by in situ photo-on-demand trichloroacetylation of amines with tetrachloroethylene (TCE). The reactions were performed by photo-irradiation of TCE solutions containing an amine under O bubbling over 70 °C with a low-pressure mercury lamp. TCE underwent photochemical oxidation to afford trichloroacetyl chloride having high toxicity and corrosivity, which then reacts in situ with the amine to afford NTCA.

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)].

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].