TY  - JOUR
AB  - A convergent approach for the incorporation of tetrafluoroaryl phosphonate moieties into cyclic triphosphazenes and linear phosphazene resins is described. Our high yield procedure is based on the treatment of chlorinated poly- and cyclotriphosphazenes withp-HO(C6F4)P(O)(OR)(2)(R = Me, Et) in the presence of potassium carbonate. Characterization of the modified cyclotriphosphazenes was accomplished by NMR and IR spectroscopy as well as by mass spectrometry. Similarly, a phosphazene resin decorated with phosphonic esters is characterized by NMR and IR spectra and GPC. Exchange of the ethyl group by a trimethylsilyl group in the novel phosphazene derivatives was effected by the reaction with trimethylsilyl bromide. The resulting silyl phosphonates were converted into the corresponding phosphonic acids by exposure to an excess of methanol. Proton conductivities of the novel phosphonic acid derivatives of poly- and cyclotriphosphazenes were studied by electrochemical impedance spectroscopy under anhydrous conditions.
DA  - 2020
DO  - 10.1002/ejic.202000804
KW  - Polyphosphazenes
KW  - Fluorine
KW  - Proton conductivity
KW  - Phosphorus
LA  - eng
PY  - 2020
SN  - 1434-1948
TI  - Tetrafluoroaryl Phosphonic Acid Functionalized Polyphosphazenes - Synthesis, Characterization, and Evaluation of Proton Conductivity
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29464960
Y2  - 2024-11-22T04:34:19
ER  -