Preparation of new azobenzene crown ethe
β
Bongkot Pipoosananakaton; Mongkol Sukwattanasinitt; Nongnuj Jaiboon; Narongsak C
π
Article
π
2000
π
Elsevier Science
π
French
β 110 KB
New azobenzene crown ether p-tert-butylcalix [4]arenes (6 and 7) have been synthesized by reductive coupling reactions between two nitrobenzene groups. Their isomerization and switchable binding properties towards Na + and K + were studied by 1 H NMR spectroscopy. The results showed that Na + prefer