Abstract
The complex formation between diazocalix[4]dipropyl (1) and diazocalix[4]crown-6 ether (2) with alkali, alkaline earth and transition metal ions was investigated by voltammetry. Electrochemical properties of compounds 1 and 2 and their selectivity toward metal ions were evaluated in CH3CN solution by comparison of voltammetric behaviors of two phenols in each compound. Compounds 1 and 2 showed almost same voltammetric behavior which is two irreversible oxidation peaks caused by intramolecular hydrogen bonding between two phenols in 1 and 2. While, however, upon interacting with various metal ions, 1 with two propyl ether groups showed no significant changes in voltammetry, 2 with crown ether group caused significant voltammetric changes upon the addition of Ba2+ to 2. Their behavior is closely related to the complex formation by entrapment of metal ion into crown ether cavity, and ion-dipole interaction between metal ion and two phenolic groups in calix[4]crown-6.
| Original language | English |
|---|---|
| Pages (from-to) | 3549-3552 |
| Number of pages | 4 |
| Journal | Bulletin of the Korean Chemical Society |
| Volume | 31 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2010 Dec 20 |
| Externally published | Yes |
Keywords
- Calixcrown
- Cation recognition
- Diazocalixarene
- Voltammetry
ASJC Scopus subject areas
- General Chemistry