Applications of Solid-State NMR to the Study of Organic/Inorganic Multicomponent Materials

Geppi, Marco; Borsacchi, Silvia; Mollica, Giulia; Veracini, Carlo Alberto

doi:10.1080/05704920802352564

Cited by 81 publications

(68 citation statements)

References 170 publications

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“…This finding seems confirmed by T

_{1ρ}^{13C}

values reported in Table 3 which allow the investigation of the local dynamic 36, 46–49. Whereas in the case of resonances at 55.5 and 44.7 ppm, the T

_{1ρ}^{13C}

decays could be well fitted with a single exponential function, a bi‐exponential function had to be used to fit the decays of resonances at 51.5 and 45.7 ppm.…”

Section: Resultssupporting

confidence: 60%

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Severe aortic valve regurgitation after percutaneous ventricular septal defect closure

Fouilloux

Kreitmann

2012

Cathet Cardio Intervent

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“…This finding seems confirmed by T

_{1ρ}^{13C}

values reported in Table 3 which allow the investigation of the local dynamic 36, 46–49. Whereas in the case of resonances at 55.5 and 44.7 ppm, the T

_{1ρ}^{13C}

decays could be well fitted with a single exponential function, a bi‐exponential function had to be used to fit the decays of resonances at 51.5 and 45.7 ppm.…”

Section: Resultssupporting

confidence: 60%

“…Results concerning solid‐state NMR studies on different classes of organic/inorganic hybrids are resumed in some reviews 27–36. These studies are focused on different solid‐state NMR techniques and discuss the information obtained from them.…”

Section: Introductionmentioning

confidence: 99%

Severe aortic valve regurgitation after percutaneous ventricular septal defect closure

Fouilloux

Kreitmann

2012

Cathet Cardio Intervent

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“…Upon silylation, T 1 , T 2 and T 3 sites, from the reacted silane molecules, were detected in the 29 Si CP MAS NMR spectra [35,38] (Fig. 5).…”

Section: Ftir and Nmrmentioning

confidence: 99%

Physicochemical characterization of silylated functionalized materials

Borrego

Andrade

Pinto

et al. 2010

Journal of Colloid and Interface Science

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“…Indeed, many papers have been published concerning studies of molecular motions through SSNMR in different systems, such as synthetic polymers, [1] biomacromolecules, [2] small organic molecules, [3] organic-inorganic composite materials, [4] and organometallics. [5] Depending on the complexity of the system investigated, the results obtained can consist of the determination of a generic "degree of mobility", useful in comparing similar systems, or of more detailed parameters characteristic of specific motions, such as the "geometry" of the motion, correlation times, and activation energies.…”

Section: Introductionmentioning

confidence: 99%

Detailed Characterization of the Dynamics of Ibuprofen in the Solid State by a Multi‐Technique NMR Approach

2011

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The internal rotations and interconformational jumps of ibuprofen in the solid state are fully characterized by the simultaneous analysis of a variety of low- and high-resolution NMR experiments for the measurement of several (13)C and (1)H spectral and relaxation properties, performed at different temperatures and, in some cases, frequencies. The results are first qualitatively analyzed to identify the motions of the different molecular fragments and to assign them to specific frequency ranges (slow, <10(3) Hz; intermediate, 10(3)-10(6) Hz; and fast, >10(6) Hz). In a second step, a simultaneous fit of the experimental data sets most sensitive to each frequency range is performed by means of suitable motional models to obtain, for each motion, values of correlation times and activation energies. The rotations of the three methyl groups around their ternary symmetry axes, which occur in the fast regime, are characterized by slightly different activation energies. Thanks to the simultaneous analysis of (1)H and (13)C data, the π-flip of the dimeric structure made by the acidic groups is also identified and seen to occur in the fast regime. On the contrary, the π-flip of the phenyl ring is found to occur in the slow motional regime, while the rotations of the isobutyl and propionic groups are frozen. The approach used appears to be of general applicability for studying the dynamics of small organic molecules.

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Applications of Solid-State NMR to the Study of Organic/Inorganic Multicomponent Materials

Cited by 81 publications

References 170 publications

Severe aortic valve regurgitation after percutaneous ventricular septal defect closure

Severe aortic valve regurgitation after percutaneous ventricular septal defect closure

Physicochemical characterization of silylated functionalized materials

Detailed Characterization of the Dynamics of Ibuprofen in the Solid State by a Multi‐Technique NMR Approach

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