Gas-phase interactions of transition-metal ions and di- and tripeptides: a comparison with alkaline-earth-metal-ion interactions

1993 ◽  
Vol 115 (19) ◽  
pp. 8821-8828 ◽  
Author(s):  
Peifeng Hu ◽  
Michael L. Gross
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Gas Phase ◽  
Metal Ion ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Transition Metal Ions ◽  
Alkaline Earth Metal ◽  
Ion Interactions ◽  
Metal Ion Interactions

scholarly journals Electrochemical Studies for Cation Recognition with Diazo-Coupled Calix[4]arenes

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Bongsu Kim ◽  
Tae Hyun Kim
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Transition Metal Ions ◽  
Ester Group ◽  
Divalent Metal Ions ◽  
Alkaline Earth Metal Ions ◽  
Cation Recognition

The electrochemical properties of diazophenylcalix[4]arenes bearingortho-carboxyl group (o-CAC) andortho-ester group (o-EAC), respectively, in the presence of various metal ions were investigated by voltammetry in CH3CN.o-CAC ando-EAC showed voltammetric changes toward divalent metal ions and no significant changes with monovalent alkali metal ions. However,o-CAC preferentially binds with alkaline earth and transition metal ions, whereas no significant changes in voltammetric signals are observed ino-EAC with alkaline earth metal ions.o-EAC only binds with other transition metal ions. This can be explained on metal ion complexation-induced release of proton from the azophenol to the quinone-hydrazone tautomer followed by internal complexation of the metal ion with aid of nitrogen atoms andortho-carbonyl groups in the diazophenylazocalix[4]arenes.

Sign in / Sign up

Export Citation Format

Share Document