1365258-86-1Relevant academic research and scientific papers
Investigation of imidazol(in)ium-dithiocarboxylates as sensors for the detection of mercury(II) and silver(I) ions
Konieczna, Dagny Dagmara,Blanrue, Amelie,Wilhelm, Rene
, p. 596 - 604 (2014)
Two imidazol(in)ium-dithiocarboxylates have been investigated as sensors for the detection of mercury ions and silver ions. They could be applied as colorimetric chemosensors for the detection of Hg2+ and Ag +. Furthermore, an additional sensory input was found by a colorimetric change of a two-phase system from the organic phase into the aqueous phase. Due to different colors at different ratios of the betaines and Hg2+ it is possible to estimate the concentration of Hg2+ with the naked eye .
Synthesis of Azolium-2-dithiocarboxylate Zwitterions under Mild, Aerobic Conditions
Delaude, Lionel,Hrubaru, Madalina,Mazars, Fran?ois,Tumanov, Nikolay,Wouters, Johan
, p. 2025 - 2033 (2021)
Twelve imidazolium-, imidazolinium-, or benzimidazolium-2-dithiocarboxylate zwitterions with aliphatic or aromatic substituents on their nitrogen atoms, including four new unsymmetrical 1-alkyl-3-arylimidazolium derivatives, were obtained in high yields (62–96 %) upon reaction of azolium salts with CS2 and Cs2CO3 in acetonitrile at room temperature. Compared to the previous strategies devised for the synthesis of NHC?CS2 betaines, this novel procedure relied on an innocuous, weak base and could be applied under mild aerobic conditions. All the new compounds were fully characterized by various analytical techniques and the molecular structures of two of them were determined by XRD analysis. An associative mechanism involving the concerted reaction of the azolium salts with both CS2 and CO32? was tentatively proposed to account for the formation of the zwitterionic adducts without the intervention of free carbenes. This would explain the good results obtained with a weak inorganic base that lacks the strength needed to deprotonate the azolium salt substrates.
Zwitterionic dithiocarboxylates derived from N-heterocyclic carbenes: Coordination to gold surfaces
Siemeling, Ulrich,Memczak, Henry,Bruhn, Clemens,Vogel, Florian,Traeger, Frank,Baio, Joe E.,Weidner, Tobias
experimental part, p. 2986 - 2994 (2012/04/10)
The zwitterionic dithiocarboxylates 1+-CS2 --4+-CS2- were prepared by reacting the corresponding N-heterocyclic carbenes 1,3-bis(2,6-diisoproylphenyl)imidazol- 2-ylidene (1), 1,3-diisopropylimidazol-2-ylidene (2), 1,3-dibenzylimidazol-2- ylidene (3) and 1,3-diethylbenzimidazol-2-ylidene (4) with CS2. In the latter two cases, the corresponding N-heterocylic carbene was generated in situ. Compounds 2+-CS2--4+-CS 2- were structurally characterised by single-crystal X-ray diffraction studies. The chemisorption of these zwitterionic dithiocarboxylates on solid gold substrates was investigated in situ and in real time by optical second harmonic generation (SHG). The resulting thin films were exemplarily characterised by near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and X-ray photoelectron spectroscopy (XPS) in the case of 1+-CS 2- and 2+-CS2-, revealing the formation of almost contamination-free self-assembled monolayers, which exhibit a remarkable degree of orientational order.
