5421-27-2Relevant academic research and scientific papers
Synthesis, characterization, and evaluation of 10-undecenoic acid-based epithio derivatives as multifunctional additives
Geethanjali, Gorla,Padmaja, Korlipara V.,Sammaiah, Arukali,Prasad, Rachapudi B. N.
, p. 11505 - 11511 (2015/02/19)
Novel epithio compounds from alkyl epoxy undecanoates (n-alkyl, C1, C4, and C6; isoalkyl, C3, C4, and C8) were synthesized using an ammonium thiocyanate in ionic liquid 1-methylimidazolium tetrafluoroborate/H2O (2:1) solvent system in 85-90% yields by gas chromatographic (GC) analysis. The synthesized products were characterized by 1H and 13C nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy (FTIR), gas chromatography, and GC mass spectral (GC-MS) analyses and evaluated for their antioxidant, extreme pressure (EP), and antiwear (AW) properties in three different base oils, namely, epoxy jatropha fatty acid n-butyl esters (EJB), di-2-ethylhexyl sebacate (DOS), and mineral oil (S-105). Among the synthesized products, n-butyl epithio undecanoate exhibited superior antioxidant property (229.2 °C) compared to butylated hydroxytoluene (BHT, 193.8 °C) in base oil DOS and comparable performance in EJB and S-105 base oils. All of the epithio derivatives exhibited significantly enhanced weld point for the base oils EJB and DOS at 2 wt % level and displayed moderate enhancement in S-105 base oil. Methyl epithio undecanoate at 0.6% concentration exhibited considerable improvement in the wear scar of DOS base oil. The synthesized epithio derivatives have potential as multifunctional additives in lubricant formulations.
HALOGEN PHOSPHONATE MONOESTERS
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Page/Page column 42-43, (2008/06/13)
The present invention relates to detection, immobilization, and production of proteolytic antibodies using halogen phosphonate monoester probes, immobilizing reagents, and antigen conjugates.
