Photoresponsive tweezers for alkali metal ions. Photochromic diarylethenes having two crown ether moieties

被引：98

作者：

Takeshita, M ^{[1
]}

Irie, M ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Dept Biochem & Chem, Higashi Ku, Fukuoka 8128581, Japan

来源：

JOURNAL OF ORGANIC CHEMISTRY | 1998年 / 63卷 / 19期

关键词：

D O I：

10.1021/jo980290q

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Alkali metal ion extraction was carried out using photochromic dithienylethene having two benzo-12-crown-4 ethers (1), benzo-15-crown-5 ethers (2), or benzo-18-crown-6 ethers moieties (3) and bis(benzothienyl)ethene having two benzo-18-crown-6 ether moieties (4). Two crown ether moieties of the open-ring form captured large metal ions cooperatively like tweezers, while the photogenerated closed-ring form released the ions. The reduced affinities for metal picrates were fully recovered by irradiation with visible light (>480 nm). The H-1 NMR spectrum measurement of the solutions (CDCl3/CD3CN: 5/1) containing both alkali metal picrates and 2 or 3 confirmed that the large alkali metal ions were captured by the two intramolecular crown ethers,

引用

页码：6643 / 6649

页数：7

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