Carbon-13 NMR Longitudinal Relaxation Time Study of an Ionophoric 1,3-Alternate-Shaped Calix[4]arene Ester
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- ARIMURA Takashi
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
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- NISHIOKA Takuya
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
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- KUMAMOTO Satoshi
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
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- TSUCHIYA Youichi
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
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- YAMAGUCHI Tomohiko
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
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- TACHIYA M.
- Fellow, National Institute of Advanced Industrial Science and Technology (AIST)
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Abstract
The carbon-13 NMR longitudinal relaxation times (T1) studies on the 1,3-alternate-shaped calix[4]arene possessing two ester groups 1 in the absence and the presence of Na+ were carried out for the first time. The T1 values were measured under proton-noise-decoupling conditions by the inversion-recovery technique. The T1-value of 1 is primarily governed by dipole-dipole relaxation. When calixarene 1 forms an ensemble with Na+, the T1-values for all carbons are decreased. This suggests that the molecular motion of species 1 is efficiently frozen through complexation with Na+. Eventually, Na+ ion plays an important role as a template ion specifically to freeze the fluctuational motion of two ethoxycarbonylmethoxybenzene units of 1.<br>
Journal
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- Journal of Oleo Science
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Journal of Oleo Science 55 (2), 75-78, 2006
Japan Oil Chemists' Society
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Details 詳細情報について
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- CRID
- 1390282679068099712
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- NII Article ID
- 130000055584
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- NII Book ID
- AA11503337
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- ISSN
- 13473352
- 13458957
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- NDL BIB ID
- 7773668
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed