Synthesis and Carbon-13 NMR Longitudinal Relaxation Time Studies of Porphyrin dimers Possessing Conformational Fluctuation
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概要
- 論文の詳細を見る
The synthesis and carbon-13 NMR longitudinal relaxation times (T1) studies on the calixarene-substituted porphyrin dimers possessing conformational fluctuation were carried out for the first time. The T1 values were measured under proton-noise-decoupling conditions by the inversion-recovery technique. The T1 values for a calix[4]arene bridged porphyrin dimer 1 decrease with the increase in the solvent polarity. This implies that the T1 values reflect the diffusion rate. As to a motion of the phenol unit, there are two different motions for phenol units in 1 and 2: a seesaw motion around a C-2 to C-2’ axis (A) and a rotational motion around a C-1 to C-4 axis (B). The T1 values indicate that in 1 motion (B) is predominant over motion (A). This shows that motion (A) is specifically suppressed because of the hydrogen-bonding interactions in 1.
- 日本油化学会の論文
- 2004-03-01
著者
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MURATA Shigeo
National Institute of Materials and Chemical Research (NIMC)
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ARIMURA Takashi
National Instiufe of Materials and Chemical Research, COE laboratory
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NISHIOKA Takuya
National Instiufe of Materials and Chemical Research, COE laboratory
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Murata S
National Institute Of Advanced Industrial Science And Technology (aist)
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KUMAMOTO Satoshi
National Institute of Advanced Industrial Science and Technology (AIST)
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TACHIYA M.
National Institute of Advanced Industrial Science and Technology (AIST)
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Tachiya Masanori
AIST Fellow
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Tachiya Masanori
National Inst. Advanced Industrial Sci. And Technol. Tsukuba Jpn
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Kumamoto Satoshi
Nanotechnology Res. Inst. Aist
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Nishioka Takuya
National Institute Of Advanced Industrial Science And Technology (aist)
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MURATA Shigeo
National Institute of Advanced Industrial Science and Technology (AIST)
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ARIMURA Takashi
National Institute of Advanced Industrial Science and Technology (AIST)
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