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- W2002047929 abstract "1H Nuclear magnetic resonance (NMR) spin-echo measurements at 268 K have been performed on water-saturated mesoporous MCM-41 materials. The pores have cylindrical geometry with diameters in the range 18–40 Å and length of approximately 1 mm. Using appropriate model calculations the self-diffusion coefficient (D) of water within the pore was estimated from the Carr-Purcell-Meiboom-Gill (CPMG) spin-echo envelope curves. D was found to be in the range 0.17·10−6 to 2.3·10−6 cm2/s and could be expressed by an equation of the form D−1∝D∞−1+α·lc−2 where D∞ is the self-diffusion coefficient of bulk water (lc = ∞) and α = (2.68 ± 0.14)·10−5s. The low values for the diffusion coefficients—compared to the diffusion coefficient of bulk water — are related to the strong interaction of the water molecules with the pore surface. Moreover, the spin-spin relaxation rate (1T2) was related to lc by application of the Bloembergen-Purcell-Pound (BPP) model." @default.
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- W2002047929 date "1995-11-01" @default.
- W2002047929 modified "2023-09-24" @default.
- W2002047929 title "Self-diffusion coefficient of water confined in mesoporous MCM-41 materials determined by 1H nuclear magnetic resonance spin-echo measurements" @default.
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- W2002047929 doi "https://doi.org/10.1016/0927-6513(95)00053-c" @default.
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