Conformational and Optical Characteristics of Unidirectionally Twisted Binaphthyl-Bipyridyl Cyclic Dyads
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- 作者：Kazuto Takaishi ; Jun Suzuki ; Tatsuya Yabe ; Hikaru Asano ; Michihiro Nishikawa ; Daisuke Hashizume ; Atsuya Muranaka ; Masanobu Uchiyama ; Akihiro Yokoyama
- 刊名：Organic Letters
- 出版年：2015
- 出版时间：August 21, 2015
- 年：2015
- 卷：17
- 期：16
- 页码：4098-4101
- 全文大小：322K
- ISSN：1523-7052
文摘
An axially chiral binaphthyl-bipyridyl cyclic dyad in which the two units are connected by short 鈭扖H2O鈥?linkers was synthesized. Experimental and theoretical analyses indicate that the (R)-binaphthyl unit in the dyad induces (R)-chirality in the bipyridyl unit, both in the solid state and in solution. It is shown that vibrational circular dichroism (VCD) is useful to determine the twisting pattern of 2,2鈥?bipyridyl compounds. The dyad shows crystallization-induced emission enhancement (CIEE).