نتایج جستجو برای: quaternary phosphonium
تعداد نتایج: 15248 فیلتر نتایج به سال:
Alkylation reactions of α-carboxylate phosphabetaines were carried out and studied to enhance the biological activity previously synthesized carboxylate phosphabetaines. As a result these reactions, original structure was destroyed with formation quaternary salts phosphonium triiodide. The composition confirmed by complex physical research methods, including NMR, IR spectroscopy, elemental anal...
The use of laser microprobe mass spectrometry (LMMS) for the structural characterization of thermolabile quaternary phosphonium salts has been evaluated. A comparison has been made between LM mass spectra obtained by direct analysis of "neat" organic salts and the corresponding "matrix-assisted" LM mass spectra. Main limitations of LMMS for the direct analysis of neat organic salts (i.e., no ma...
Solid alkaline fuel cell is employed by polymer anion exchange membrane (AEM) that is permeable to hydroxide ion. A number of polymers have been proposed for AEM which include polysulfone (PSF), poly (phenylene oxide) (PPO), and poly (ether ether ketone) (PEEK). The purpose of this paper was to conduct a critical review on the development of PEEK polymer as AEM, particu...
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