Synthesis of novel fluorinated phosphonic and phosphinic acid electrolytes for phosphoric acid fuel cells. Annual report, June 1986-May 1987
Technical Report
·
OSTI ID:6146393
New methodology has been developed for the preparation of halodifluoromethyl phosphonates. Various coupling processes convert the halodifluoromethyl phosphonates to fluorinated bis-phosphonates, which serve as precursors to the fluorinated phosphonic acids. Alternatively, alpha, omega diiodoperfluoroalkanes can be converted to fluorinated bis-phosphites, which can be oxidized to the desired fluorinated bis-phosphonate precursors. The halodifluoromethyl phosphonates were also utilized as precursors to the preparation of mixed fluorinated phosphonic-sulfonic acid derivatives, a previously unknown class of superacid. Alternatively, the halodifluoromethyl phosphonates were employed in the preparation of stable difluoromehtylene phosphonate organometallics, which could be functionalized to yield the fluorinated phosphonic-sulfonic acid derivatives. Complete electrochemical evaluation is in progress.
- Research Organization:
- Iowa Univ., Iowa City (USA). Dept. of Chemistry
- OSTI ID:
- 6146393
- Report Number(s):
- PB-87-218152/XAB
- Country of Publication:
- United States
- Language:
- English
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