It is well known that crown ethers have good coordinating ability to metal ions. Armed crown ethers intoduce guest-ligating sidearms to the crown rings to form dynamic and three dimentional complexes which are attracting increased interest as intelligent molecules.1)
These compounds, 1-6, have nitrogen atoms at their crown rings, and via the introduction of sidearms by reaction with electrophiles, can be transformed in to armed crown ethers exhibiting new functionality. For example, 7 having an amine-functionalized sidearm shows high lithium ion selectivity,2) while it is formally size-fitted to the 12-crown 4-ether cavity which exhibits sodium ion selectivity.
Furthermore, armed crown ether 8, a metal-ligating sidearm which contains a chromophore, is used for the liquid-liquid extraction of alkali metal ions, and can monitor these ions by colorimetry.3)
Maximum quantity allowed is 999
请选择数量
Armed Crown Ether
No.116(April 2003)
References
- 1)Review
- 2)Ion-selective binding and transport properties of amine-armed azacrown ethers
- 3)Synthesis of chromogenic crown ethers and liquid-liquid extraction of alkali metal ions
Related Compounds
The prices are subject to change without notice. Please confirm the newest price by our online catalog before placing an order.
In addition, sales products changes with areas. Please understand that a product is not available when the product details page is not displayed.
In addition, sales products changes with areas. Please understand that a product is not available when the product details page is not displayed.