The first direct detection of rapid migration of acidic protons between heteropolyanions in H3PW12O40 center dot nH(2)O (n < 6) by P-31 NMR
(1998) Chemistry Letters — n° 7, p. 643-644 (1998)
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- Abstract
- The dynamic behavior of the acidic protons in a hydrated pseudoliquid phase of H3PW12O40. nH(2)O (n < 6) was analyzed by means of P-31 magic-angle spinning (MAS) NMR. With this method the "isolated" acidic protons on heteropolyanions were distinguished from protons in H3O+ and H5O2+. At 173 K, as evidenced by four P-31 MAS NMR peaks, these "isolated" protons were distributed among polyanions so that heteropolyanions directly bonding to 0, 1, 2, and 3 isolated acidic proton(s) coexist. At 298 K, these peaks coalesced, directly demonstrating for the first time the rapid migration of the isolated protons between heteropolyanions.
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Uchida, S., Inumaru, K., Dereppe, J.-M., & Misono, M. (1998). The first direct detection of rapid migration of acidic protons between heteropolyanions in H3PW12O40 center dot nH(2)O (n < 6) by P-31 NMR. Chemistry Letters, 7, 643-644. https://doi.org/10.1246/cl.1998.643 (Original work published 1998)