中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
氮杂-15-冠醚-5 | 1,4,7,10-tetraoxa-15-azacyclopentadecane | 66943-05-3 | C10H21NO4 | 219.281 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 13-(2-methacryloyloxyethyl)-1,4,7,10-tetraoxa-13-azacyclotetradecane | 1288985-47-6 | C16H29NO6 | 331.409 |
The efficiency of polymer analogues of oligo(oxyethylene)s and sulfoxides in the activation of nucleophilic substitution reactions were compared by testing to the reaction between sodium phenoxide and 1-bromooctane in 1,4-dioxane. With polymer analogues of crown ethers and polymer networks having the pseudo-crown ether structure the polymer effect can be achieved, i.e. a higher activation efficiency of the polymer analogue (in the L-S system) compared with the efficiency of the unimmobilized compound (in the homogeneous system). The results suggest that several molecules of the linear activator or of side active groupings (chains) on the polymer having the podand structure take part in the formation of the activation site (for the complex formation or solvation of the cation).
New ionophores derived from azacrown ethers attached to coumarins have been synthesized and characterized. The alkaline-earth complexes of these new ligands were studied from their UVvis, NMR, and fluorescence data. Some systems displayed bathochromic shifts and fluorescence decreases upon complexation with Ca2+ that may make them useful signaling devices of this metal.Key words: alkaline earth, emission, molecular modeling.