140-92-1Relevant academic research and scientific papers
Synthesis of nanostructured powders and thin films of iron sulfide from molecular precursors
Almanqur, Laila,Vitorica-Yrezabal, Inigo,Whitehead, George,Lewis, David J.,O'Brien, Paul
, p. 29096 - 29103 (2018)
Iron(iii) xanthate single-source precursors [Fe(S2COR)3] (R = methyl, ethyl, isopropyl and 1-propyl) were used to deposit iron sulfide thin films and nanostructures by two simple, efficient and low-cost methods (spin coating and solid state deposition). The single-crystal X-ray structures of the iron(iii) n-propyl xanthate and iron(iii) iso-propyl xanthate have been determined. Thermogravimetric analysis (TGA) studies of the complexes shows that decomposition of the complexes produces iron sulfide, pyrite or trolite. The crystallinity of iron sulfide thin films and powder samples was studied using X-ray diffraction (XRD), and their morphology was studied by scanning electron microscopy (SEM).
Electrochemical deposition of highly-conducting metal dithiolene films
Allwright, Emily,Silber, Georg,Crain, Jason,Matsushita, Michio M.,Awaga, Kunio,Robertson, Neil
, p. 9363 - 9368 (2016)
Electrochemical deposition has been used to prepare a thin film of neutral 4′,4-(3-alkyl)-thiophene-5′,5-hydogen-nickel and copper dithiolenes (Ni-C2, Cu-C2). The application of molecular electrodeposition provides a means to solution process molecular semiconductors of poor solubility, which results from the strong intermolecular interaction required for charge transport. Both Ni-C2 and Cu-C2 form continuous thin films that show intense NIR absorptions, extending to 1800 nm and 2000 nm respectively giving evidence for the strong intermolecular interactions in the solid state. Both films are highly conducting and temperature dependence of resistance gave an activation energy of 0.42 eV and 0.072 eV respectively, with the near-metallic behaviour of Cu-C2 attributed to the additional presence of an unpaired electron.
Important Phase Control of Indium Sulfide Nanomaterials by Choice of Indium(III) Xanthate Precursor and Thermolysis Temperature
Masikane, Siphamandla C.,McNaughter, Paul D.,Lewis, David J.,Vitorica-Yrezabal, Inigo,Doyle, Bryan P.,Carleschi, Emanuela,O'Brien, Paul,Revaprasadu, Neerish
, p. 1421 - 1432 (2019)
Four In(III) xanthate complexes, [In(S2COR)3] where R = Me, Et, iPr and sBu, respectively, were synthesized, characterized and subsequently used as single source molecular precursors via a solventless thermolysis route to obtain indium sulfide materials. By choice of precursor and reaction temperature crystalline powders of tetragonal In2S3, cubic In2S3 and cubic In2.77S4 were acquired. The phase identification and purity were conducted through examination of the experimental powder X-ray diffraction patterns relative to the simulated patterns for single X-ray crystal diffraction.
Potassium isopropyl xanthate (PIX): An ultra-efficient palladium scavenger
Ren, Hong,Strulson, Christopher A.,Humphrey, Guy,Xiang, Rong,Li, Guangtao,Gauthier, Donald R.,Maloney, Kevin M.
, p. 4002 - 4006 (2017)
The increasing employment of palladium-catalyzed reactions in the synthesis of active pharmaceutical ingredients (APIs) has created a pressing need for ultra-efficient palladium removal of the resulting metal contaminants. This communication discusses the identification and development of Potassium Isopropyl Xanthate (PIX) as a simple, readily available and ultra-efficient palladium scavenger capable of removing residual palladium from the API to levels less than 1 ppm. In addition, the discovery of a synergistic effect of iodine, in combination with PIX and other palladium scavengers, to enhance palladium removal has further increased the efficiency of the palladium removal process. The PIX and I2 system has been successfully applied to the ceftolozane sulfate 2nd generation manufacturing chemistry to reduce palladium in the API resulting from a late stage palladium-catalyzed coupling reaction to only 0.1 ppm.
Improved synthesis of the high-mobility organic semiconductor dithiophene-tetrathiafulvalene
Crivillers, Nuria,Oxtoby, Neil S.,Mas-Torrent, Marta,Veciana, Jaume,Rovira, Concepcio
, p. 1621 - 1623 (2007)
Dithiophene-tetrathiafulvalene (DT-TTF) has been shown to be a promising organic semiconductor for organic transistors, since it combines high mobility with processability. A novel synthesis to prepare this material is described here. It involves the coupling of a 1,3-dithiol-2-one. The yield of this route is higher than previously reported yields. Georg Thieme Verlag Stuttgart.
Correlations between Nuclear Magnetic Resonance Spectra and Crystal Structures. A Carbon-13 Nuclear Magnetic Resonance Study in the Solid State of the Group 15 Xanthates (A=As(III), Sb(III), or Bi(III); R=Me, Et, or Pri)
Hounslow, Andrea M.,Lincoln, Stephen F.,Tiekink, Edward R. T.
, p. 233 - 236 (1989)
The 13C cross-polarisation magic angle spinning (c.p.m.a.s.) n.m.r. spectra of solid (A=As(III) or Sb(III); R=Me, Et, or Pri; A=Bi(III); R=Me or Pri) exhibit systematic features which correlate well with the known crystal structures.In the case of , for which no crystal structure is available, the 13C c.p.m.a.s. n.m.r. spectrum is consistent with this species crystallising as two polymorphs, and their gross structural features are deduced through the correlations of spectra with structures drawn from the preceding eight Group 15 xanthates.The species K(S2COMe) and K(S2COPri) have been studied similarly.
Synthesis, Spectroscopy, Semi-empirical and Biological Activities of Organotin(IV) Complexes with o-Isopropyl Carbonodithioic Acid
Javed, Fatima,Ali, Saqib,Shahzadi, Saira,Khalid, Nasir,Tabassum, Saira,Khan, Imran,Sharma, Saroj K.,Qanungo, Kushal
, p. 728 - 738 (2015)
New organotin(IV) complexes have been synthesized by treating potassium o-isopropyl carbonodithioate with R2SnCl2/R3SnCl in 1:2/1:1 M/L ratio. All complexes have been characterized by IR and NMR (1H, 13C) spectroscopy. IR results shows that ligand acts as bidentate which is also confirmed by semi-empirical study. NMR data reveals four coordinated geometry in solution. Computed positive heat of formation shows that complex 5 is thermodynamically unstable. UV/visible spectroscopy was used to assess the mode of interaction and binding of the complexes with DNA which shows that complex 5 exhibits higher binding constant as compared to complex 3. In protein kinase inhibition assay, compound 3 was found most active, while other biological activities shows that triorganotin(IV) complexes are biologically more active as compared to diorganotin(IV) complexes.
The unexpected formation of a triselenide from 4-methyl-5-tri-n-butylstannyl-1,3-dithiol-2-one and selenium dioxide
Schindler, Claudia,Schulzke, Carola
, p. 80 - 82 (2017)
When attempting to apply a Riley oxidation to a stannylated precursor instead of the expected aldehyde an acyclic triselenide was obtained in which a Se3 chain replaces the nBu3Sn substituents of two precursors. The reaction was found to be fully reproducible. The product bearing the Se3 moiety and, hence, potentially possessing beneficial biological activity was analyzed comprehensively including X-ray structural characterization and 77Se NMR.
On the phase control of CuInS2 nanoparticles from Cu-/In-xanthates
Al-Shakban, Mundher,Matthews, Peter D.,Zhong, Xiang L.,Vitorica-Yrezabal, Inigo,Raftery, James,Lewis, David J.,O'Brien, Paul
, p. 5304 - 5309 (2018)
In this paper we report the synthesis and single-crystal X-ray characterisation of six novel indium(iii) xanthate complexes. These xanthates have been used as an In-source for the synthesis of highly crystalline CuInS2 nanoparticles in conjunction with a Cu(i)-xanthate. In synthesising the nanoparticles we have also demonstrated an ability to control the phase of the material through choice of solvent.
Crystal and molecular structure of tris-(O-isopropylxanthato)-chromium(III)
Bhargava, Sanjeev,Bohra, Rakesh,Mehrotra, R. C.
, p. 281 - 285 (1991)
The title compound has been synthesized by the reaction of CrCl3*6H2O with K in a 1:3 molar ratio in an aqueous medium.It has been characterized by elemental analysis and IR spectral studies.Crystals of Cr3 are monoclinic, space group P21/n with a = 10.002(2), b = 10.973(1), c = 18.961(6) Angstroem, β = 91.78(2) deg, V = 2079.9 Angstroem3, Z = 4, Dcalc = 1.46 g cm-3, monochromatic radiation (Mo-Kα), λ = 0.71069 Angstroem, μ = 11.2 cm-1, F(0 0 0) = 948, T = 295 K, final R = 0.0320 for 2641 reflections.The environment of the chromium atom is based on an octahedral geometry having six sulfur donor atoms from three symmetrically chelated ligands with average distances: Cr-S = 2.396(9) Angstroem, C-S = 1.690(3) Angstroem and C-O = 1.315(3) Angstroem.The bond distance between oxygen atom and the carbon atom of the isopropyl group (O-Cav = 1.478(4) Angstroem) suggests that the form -S2(-)C = O(+)CH(CH3)2 contributes significantly to the structure of the isopropyl group.
