2010年3月
Effect of an Intramolecular Hydrogen Bond Belt and Complexation with the Guest on the Rotation Behavior of Phenolic Units in Pillar[5]arenes
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
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- 巻
- 1
- 号
- 5
- 開始ページ
- 817
- 終了ページ
- 821
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/jz900437r
- 出版者・発行元
- AMER CHEMICAL SOC
The rotation behavior of the phenolic units in pillar[5]arenes has been studied by means of the dynamic (1)H NMR measurements. In acetone-d(6), the individual conformers of pillar[5]arene were observed under -60 degrees C, indicating that the rotation movement was slow on the NMR time scale under -60 degrees C. In permethylated pillar[5]arene in acetone-d(6), the peaks were not split even at -90 degrees C, strongly suggesting that the rotation movement was fast on the NMR time scale at -90 degrees C. This is due to the lack of the intramolecular hydrogen bond belt in permethylated pillar[5]arene. In the mixture of pillar[5]arene and viologen guest in acetone-d(6), the split peaks were found at -30 degrees C and did not change under -60 degrees C. By formation of the host-guest complex between pillar[5]arene and viologen guest, the rotation movement was slow on the NMR time scale under -30 degrees C and almost stopped under -60 degrees C.
- リンク情報
- ID情報
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- DOI : 10.1021/jz900437r
- ISSN : 1948-7185
- ORCIDのPut Code : 43134772
- Web of Science ID : WOS:000277041000004
- ORCIDで取得されたその他外部ID : a:1:{i:0;a:1:{s:0:"";s:0:"";}}