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Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature
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| Zeitschriftentitel: | Zeitschrift für Naturforschung A |
|---|---|
| Personen und Körperschaften: | |
| In: | Zeitschrift für Naturforschung A, 28, 1973, 1, S. 98-104 |
| Format: | E-Article |
| Sprache: | Unbestimmt |
| veröffentlicht: |
Walter de Gruyter GmbH
|
| Schlagwörter: |
| author_facet |
Haupt, J. Haupt, J. |
|---|---|
| author |
Haupt, J. |
| spellingShingle |
Haupt, J. Zeitschrift für Naturforschung A Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics |
| author_sort |
haupt, j. |
| spelling |
Haupt, J. 1865-7109 0932-0784 Walter de Gruyter GmbH Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics http://dx.doi.org/10.1515/zna-1973-0117 <jats:p>A description of the apparatus for a new dynamic polarization effect by variation of temperature, and the experimental results obtained, are presented. As described earlier a temperature jump produces a very large enhancement of the dipolar signal (about 10.000) in solid y-picolene due to the dipolar couplings between the protons of the CH<jats:sub>3</jats:sub>-group and the modes of the CH<jats:sub>3</jats:sub>-rotator with the crystal phonons. A simple phenomenological model for the interpretation of the experimental data is introduced. Within the experimental errors agreement between model and data is obtained.</jats:p><jats:p> From the shape of the measured polarization curves a dipolar polarization time T<jats:sub>p</jats:sub> and the dipolar relaxation time T<jats:sub>d</jats:sub> is determined. From the maxima of the polarization at different temperature jumps a curve dependent only on the temperature is constructed, which together with T<jats:sub>p</jats:sub> and T<jats:sub>d</jats:sub> characterizes completely the dynamic polarization behaviour.</jats:p><jats:p> A comparison of the Zeeman- and dipolar relaxation with earlier measurements on similar molecules containing CH<jats:sub>3</jats:sub>-groups shows that the CH<jats:sub>3</jats:sub>-rotation in solid y-picolene is almost unhindered and that the "relaxation efficiency" is very low. These last conditions are important for a large enhancement of the dipolar polarization.</jats:p> Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature Zeitschrift für Naturforschung A |
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Zeitschrift für Naturforschung A |
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| title |
Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_unstemmed |
Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_full |
Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_fullStr |
Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_full_unstemmed |
Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_short |
Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_sort |
experimental results on the dynamic polarisation in a solid by variation of temperature |
| topic |
Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics |
| url |
http://dx.doi.org/10.1515/zna-1973-0117 |
| publishDate |
1973 |
| physical |
98-104 |
| description |
<jats:p>A description of the apparatus for a new dynamic polarization effect by variation of temperature, and the experimental results obtained, are presented. As described earlier a temperature jump produces a very large enhancement of the dipolar signal (about 10.000) in solid y-picolene due to the dipolar couplings between the protons of the CH<jats:sub>3</jats:sub>-group and the modes of the CH<jats:sub>3</jats:sub>-rotator with the crystal phonons. A simple phenomenological model for the interpretation of the experimental data is introduced. Within the experimental errors agreement between model and data is obtained.</jats:p><jats:p> From the shape of the measured polarization curves a dipolar polarization time T<jats:sub>p</jats:sub> and the dipolar relaxation time T<jats:sub>d</jats:sub> is determined. From the maxima of the polarization at different temperature jumps a curve dependent only on the temperature is constructed, which together with T<jats:sub>p</jats:sub> and T<jats:sub>d</jats:sub> characterizes completely the dynamic polarization behaviour.</jats:p><jats:p> A comparison of the Zeeman- and dipolar relaxation with earlier measurements on similar molecules containing CH<jats:sub>3</jats:sub>-groups shows that the CH<jats:sub>3</jats:sub>-rotation in solid y-picolene is almost unhindered and that the "relaxation efficiency" is very low. These last conditions are important for a large enhancement of the dipolar polarization.</jats:p> |
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| description | <jats:p>A description of the apparatus for a new dynamic polarization effect by variation of temperature, and the experimental results obtained, are presented. As described earlier a temperature jump produces a very large enhancement of the dipolar signal (about 10.000) in solid y-picolene due to the dipolar couplings between the protons of the CH<jats:sub>3</jats:sub>-group and the modes of the CH<jats:sub>3</jats:sub>-rotator with the crystal phonons. A simple phenomenological model for the interpretation of the experimental data is introduced. Within the experimental errors agreement between model and data is obtained.</jats:p><jats:p> From the shape of the measured polarization curves a dipolar polarization time T<jats:sub>p</jats:sub> and the dipolar relaxation time T<jats:sub>d</jats:sub> is determined. From the maxima of the polarization at different temperature jumps a curve dependent only on the temperature is constructed, which together with T<jats:sub>p</jats:sub> and T<jats:sub>d</jats:sub> characterizes completely the dynamic polarization behaviour.</jats:p><jats:p> A comparison of the Zeeman- and dipolar relaxation with earlier measurements on similar molecules containing CH<jats:sub>3</jats:sub>-groups shows that the CH<jats:sub>3</jats:sub>-rotation in solid y-picolene is almost unhindered and that the "relaxation efficiency" is very low. These last conditions are important for a large enhancement of the dipolar polarization.</jats:p> |
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| spelling | Haupt, J. 1865-7109 0932-0784 Walter de Gruyter GmbH Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics http://dx.doi.org/10.1515/zna-1973-0117 <jats:p>A description of the apparatus for a new dynamic polarization effect by variation of temperature, and the experimental results obtained, are presented. As described earlier a temperature jump produces a very large enhancement of the dipolar signal (about 10.000) in solid y-picolene due to the dipolar couplings between the protons of the CH<jats:sub>3</jats:sub>-group and the modes of the CH<jats:sub>3</jats:sub>-rotator with the crystal phonons. A simple phenomenological model for the interpretation of the experimental data is introduced. Within the experimental errors agreement between model and data is obtained.</jats:p><jats:p> From the shape of the measured polarization curves a dipolar polarization time T<jats:sub>p</jats:sub> and the dipolar relaxation time T<jats:sub>d</jats:sub> is determined. From the maxima of the polarization at different temperature jumps a curve dependent only on the temperature is constructed, which together with T<jats:sub>p</jats:sub> and T<jats:sub>d</jats:sub> characterizes completely the dynamic polarization behaviour.</jats:p><jats:p> A comparison of the Zeeman- and dipolar relaxation with earlier measurements on similar molecules containing CH<jats:sub>3</jats:sub>-groups shows that the CH<jats:sub>3</jats:sub>-rotation in solid y-picolene is almost unhindered and that the "relaxation efficiency" is very low. These last conditions are important for a large enhancement of the dipolar polarization.</jats:p> Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature Zeitschrift für Naturforschung A |
| spellingShingle | Haupt, J., Zeitschrift für Naturforschung A, Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature, Physical and Theoretical Chemistry, General Physics and Astronomy, Mathematical Physics |
| title | Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_full | Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_fullStr | Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_full_unstemmed | Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_short | Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| title_sort | experimental results on the dynamic polarisation in a solid by variation of temperature |
| title_unstemmed | Experimental Results on the Dynamic Polarisation in a Solid by Variation of Temperature |
| topic | Physical and Theoretical Chemistry, General Physics and Astronomy, Mathematical Physics |
| url | http://dx.doi.org/10.1515/zna-1973-0117 |