41924-24-7Relevant articles and documents
Size and Quality Enhancement of 2D Semiconducting Metal-Organic Chalcogenolates by Amine Addition
Lee, Woo Seok,Müller, Peter,Paritmongkol, Watcharaphol,Sakurada, Tomoaki,Tisdale, William A.,Wan, Ruomeng
, p. 20256 - 20263 (2021/12/03)
The use of two-dimensional (2D) materials in next-generation technologies is often limited by small lateral size and/or crystal defects. Here, we introduce a simple chemical strategy to improve the size and overall quality of 2D metal-organic chalcogenolates (MOCs), a new class of hybrid organic-inorganic 2D semiconductors that can exhibit in-plane anisotropy and blue luminescence. By inducing the formation of silver-amine complexes during a solution growth method, we increase the average size of silver phenylselenolate (AgSePh) microcrystals from 1 mm, while simultaneously extending the photoluminescence lifetime and suppressing mid-gap emission. Mechanistic studies using 77Se NMR suggest dual roles for the amine in promoting the formation of a key reactive intermediate and slowing down the final conversion to AgSePh. Finally, we show that amine addition is generalizable to the synthesis of other 2D MOCs, as demonstrated by the growth of single crystals of silver 4-methylphenylselenolate (AgSePhMe), a novel member of the 2D MOC family.
Copper complexes and carbon nanotube-copper ferrite-catalyzed benzenoid A-ring selenation of quinones: An efficient method for the synthesis of trypanocidal agents
Jardim, Guilherme A.M.,Bozzi, ícaro A.O.,Oliveira, Willian X.C.,Mesquita-Rodrigues, Camila,Menna-Barreto, Rubem F.S.,Kumar, Ramar A.,Gravel, Edmond,Doris, Eric,Braga, Antonio L.,Da Silva Júnior, Eufranio N.
, p. 13751 - 13763 (2019/09/16)
We report a new method for A-ring selenation of naphthoquinones and anthraquinones and discuss the relevant trypanocidal activity of the synthesized compounds. We have demonstrated three efficient strategies for the preparation of the target selenium derivatives, i.e. (a) copper(i) thiophene-2-carboxylate and in situ generated Santi's reagent were used to prepare selenium-substituted benzenoid quinones, (b) copper complexes and (c) carbon nanotube-supported copper ferrite as catalysts in the presence of AgSeR-salts were also used for the synthesis of selenium-containing quinoidal derivatives. These new methods provide efficient and practical strategies for the preparation of selenium-based quinones. In addition, we have discovered nine compounds with potent trypanocidal activity. The derivatives 2a-2e showed potent trypanocidal activity with IC50 values in the range of 13.3 to 37.0 μM.