Photoresponsive Crown Ethers. 13. Synthesis of Photoresponsive NS<sub>2</sub>O Crown Ethers and Application of the Cu(I) Complexes to O<sub>2</sub>-Binding
作者:Seiji Shinkai、Kazuyoshi Shigematsu、Yoshihiro Honda、Osamu Manabe
DOI:10.1246/bcsj.57.2879
日期:1984.10
Photoresponsive crown ethers with heavy metal affinity were synthesized: They are the NS2O crowns bound to photofunctional azobenzene at 4,4′-positions via X(CH2 or CO) (1(X=CH2) and 1(X CO), respectively). They efficiently extracted heavy metal ions from aqueous phase to organic(dichloromethane) phase. The continuous variation method established that both trans-1 and photoisomerized cis-1 bind two
合成了具有重金属亲和力的光响应冠醚:它们是通过 X(CH2 或 CO)(分别为 1(X=CH2)和 1(XCO))在 4,4' 位与光功能偶氮苯结合的 NS2O 冠。他们有效地将重金属离子从水相萃取到有机(二氯甲烷)相。连续变化方法确定 trans-1 和光异构化 cis-1 都结合两个 Cu(II) 离子,形成 1:1 金属/NS2O 冠络合物。trans-1(X=CH2)·Cu(I)2 配合物被 O2 不可逆地氧化为 Cu(II)2 配合物,而 cis-1(X=CH2)·Cu(I)2 配合物结合 O2一种部分可逆的方式,如 Osborn 的情结。因此,Cu(I)·····Cu(I)原子间距离的光致变化是O2配合物稳定性的原因。