Shenderovich, Ilya G. (2020) For Whom a Puddle Is the Sea? Adsorption of Organic Guests on Hydrated MCM-41 Silica. LANGMUIR, 36 (38). pp. 11383-11392. ISSN 0743-7463,
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Thermal and hydration effects on the mobility of compact and branched organic molecules and a bulky pharmaceutical substance loaded in submonolayer amounts onto mesoporous silica have been elucidated using H-1 and P-31 solid-state NMR In all cases, the ambient hydration has a stronger effect than an increase in temperature to 370 K for water-free silica. The effect of hydration depends on the guest and ranges from complete solvation to a silica-water-guest sandwich structure to a silica-guest/silica-water pattern. The mobility of the guests under different conditions has been described. The specific structure of the MCM-41 surface allows one to study very slow surface diffusion, a diffusivity of about 10(-15)-10(-16) m(2)/s. The data reported are relevant to any nonfunctionalized silica, while the method used is applicable to any phosphor-containing guest on any host.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PROTON-BOUND HOMODIMERS; CHEMICAL-SHIFT TENSOR; MESOPOROUS SILICA; PHOSPHINE OXIDES; HYDROGEN-BOND; MAGNETIC-RESONANCE; SURFACE-PROPERTIES; MELTING BEHAVIOR; ACTIVATED CARBON; INNER SURFACES; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Central Analytical Services |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Mar 2021 05:19 |
| Last Modified: | 15 Mar 2021 05:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43740 |
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