22541-48-6Relevant academic research and scientific papers
Novel organotin complexes derived from 2,2′-selenodiacetic acid: Synthesis and biological evaluation
Li, Qianli,Liu, Xinglong,Cheng, Shuang,Zhang, Rufen,Shi, Yang,Ma, Chunlin
, p. 32484 - 32492 (2016)
The reactions of 2,2′-selenodiacetic acid and the corresponding organotin(iv) chloride with sodium ethoxide in ethanol, or via a solvothermal synthetic route, have afforded four organotin polymers, namely, [(Me3Sn)2Se(CH2COO)2]n (1), [(Me2Sn)2Se(CH2COO)2(μ3-O)]n (2), [(Bu3Sn)2Se(CH2COO)2]n (3), and [(Bu2Sn)Se(CH2COO)2]n (4). All the complexes were fully characterized by elemental analysis, FT-IR, NMR (1H, 13C, and 119Sn) spectroscopy and single crystal X-ray diffraction analysis. The structural analysis reveals that complex 1 is a 2D-polymer containing interconnected 24-membered (Sn4O8C10Se2) macrocyclic rings. Unlike complex 1, the 2D polymer structure of complex 2 is made up of the typical ladder tetraorganodistannoxane unit containing 32-membered (Sn4O8C16Se4) macrocyclic rings. Complex 3 is a 3D corrugated polymeric structure in which the deprotonated dicarboxylic acid acts as a tetradentate ligand by four oxygen atoms. Complex 4 is a 1D zigzag coordination polymer and the tin coordination geometry is described as skewed-trapezoidal bipyramidal. In particular, preliminary cytotoxic assessments of the involvement of complex 4 in the apoptotic death of MDA cells were conducted, and the results revealed that the antiproliferative and proapoptotic effect of complex 4 in MDA cells prominently contributed to the overload of intracellular ROS levels and the dysfunctional depolarization of mitochondrial membranes.
On the constituents of aqueous polyselenide electrolytes: A combined theoretical and Raman spectroscopic study
Goldbach,Johnson,Meisel,Curtiss,Saboungi, Marie-Louise
, p. 4461 - 4467 (1999)
The speciation of aqueous polyselenide solutions at high pH values has been investigated by Raman and UV/vis absorption spectroscopy. Complementary, ab initio molecular orbital calculations at the HF/6-31+G* level of theory have been carried out on the vibrational frequencies of polyselenide dianions Sex2- (x = 2-4), polyselenide radical anions Sex- (x = 2, 3), and protonated polyselenides HSex- (x = 1-3) in order to substantiate the assignment of the experimental Raman spectra. Although the optical spectra suggest the successive formation of Se22-, Se32-, and Se42- with progressive oxidation of the solutions, only two characteristic Raman bands are observed at 269 and 324 cm-1. A sequence of overtones of the 269 cm-1 band is observed after excitation with blue light. Likewise strong overtones of the 324 cm-1 band appear after excitation with green light. The 269 cm-1 feature is assigned to Se42- while the 324 cm-1 band is attributed to the radical anion Se2-. The occurrence of polyselenide radicals in aqueous solution is without precedent, and the formation of Se2- is ascribed to a photolytic process in the electrolyte. The only protonated species observed in this study is HSe-, which is characterized by a Raman band at 2303 cm-1.
Electrochemical synthesis of organochalcogenides in aqueous medium
Ribeiro Neto, Pedro B.,Santana, Sonydelane O.,Levitre, Guillaume,Galdino, Danilo,Oliveira, Jadson L.,Ribeiro, Rogério T.,Barros, Maria E. S. B.,Bieber, Lothar W.,Menezes, Paulo H.,Navarro, Marcelo
supporting information, p. 657 - 661 (2016/02/12)
The electrochemical preparation of telluride, selenide and sulfide ions was carried out in NaOH aqueous solution, using a two compartment cell. Organochalcogenides were prepared from halogenated compounds in a two-step procedure. The monochalcogenides were obtained as the major products in good yields.
Homo- and heteropolychalcogenide anions Ch2-, HCh-, Ch22-, Ch32-, and Ch42- (Ch = Se and/or Te): Solution 1H, 77Se, 123Te, and 12
Bj?rgvinsson, Már,Schrobilgen, Gary J.
, p. 2540 - 2547 (2008/10/08)
The homo- and heteropolychalcogenide anions, Chn2- (n = 1, 2, 3, 4; Ch = Se and/or Te) and the hydrochalcogenide anions, HCh-, have been prepared and characterized in solution by 1H, 77Se, 123/s
