34321-85-2Relevant academic research and scientific papers
Controlled Covalent Functionalization of 2 H-MoS2 with Molecular or Polymeric Adlayers
Quirós-Ovies, Ramiro,Vázquez Sulleiro, Manuel,Vera-Hidalgo, Mariano,Prieto, Javier,Gómez, I. Jénnifer,Sebastián, Víctor,Santamaría, Jesús,Pérez, Emilio M.
supporting information, p. 6629 - 6634 (2020/04/07)
Most air-stable 2D materials are relatively inert, which makes their chemical modification difficult. In particular, in the case of MoS2, the semiconducting 2 H-MoS2 is much less reactive than its metallic counterpart, 1T-MoS2. As a consequence, there are hardly any reliable methods for the covalent modification of 2 H-MoS2. An ideal method for the chemical functionalization of such materials should be both mild, not requiring the introduction of a large number of defects, and versatile, allowing for the decoration with as many different functional groups as possible. Herein, a comprehensive study on the covalent functionalization of 2 H-MoS2 with maleimides is presented. The use of a base (Et3N) leads to the in situ formation of a succinimide polymer layer, covalently connected to MoS2. In contrast, in the absence of base, functionalization stops at the molecular level. Moreover, the functionalization protocol is mild (occurs at room temperature), fast (nearly complete in 1 h), and very flexible (11 different solvents and 10 different maleimides tested). In practical terms, the procedures described here allow for the chemist to manipulate 2 H-MoS2 in a very flexible way, decorating it with polymers or molecules, and with a wide range of functional groups for subsequent modification. Conceptually, the spurious formation of an organic polymer might be general to other methods of functionalization of 2D materials, where a large excess of molecular reagents is typically used.
Synthesis of New Bifunctional Maleimide Compounds for the Preparation of Chemoimmunoconjugates
Beyer,Krüger,Schumacher,Unger,Kratz
, p. 91 - 102 (2007/10/03)
Bifunctional maleimide compounds are suitable for binding small molecules to carrier proteins in that they bind to the sulfhydryl group of proteins through the double bond of the maleimide group and to molecules of low molecular weight (e.g. anticancer drugs) through a functional group X. 18 maleimide compounds of the general formula Maleimid-R-X (R = phenylene, benzyl-, methylene-, ethylene, or a m-benzoylethylamide group and X = hydroxy-, amino-, hydrazino-, carboxylic acid-, carboxylic anhydride-, carboxylic acid chloride-, carboxylic acid hydrazide-, oxycarbonylchloride-, aldehyde, keto-, or p-toluenesulfonate-group) were synthesized and characterized through 1H- and 13C-NMR-spectroscopy, elemental analysis, and mass spectrometry.
