Electron Exchange Columns through Entrapment of a Nickel Cyclam in a Sol–Gel Matrix

Authors

  • Dr. Yair Lavi,

    1. Chemada fine chemicals Ltd (Israel)
    2. Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva (Israel)
    Search for more papers by this author
  • Dr. Ariela Burg,

    1. Department of Chemical Engineering, Sami Shamoon College of Engineering, Beer-Sheva, (Israel)
    Search for more papers by this author
  • Dr. Eric Maimon,

    1. Nuclear Research Centre-Negev, Chemistry Department, Beer-Sheva (Israel)
    2. Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-2115 (USA)
    Search for more papers by this author
  • Prof. Dan Meyerstein

    Corresponding author
    1. Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva (Israel)
    2. Biological Chemistry Department, Ariel University Center of Samaria, Ariel (Israel)
    • Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva (Israel)
    Search for more papers by this author

Abstract

An electron exchange column (analogous to ion exchange columns) was developed using the unique redox properties of the nickel–tetraazamacrocyclic complexes (nickel cyclam [NiIIL1]2+) and nickel–trans-III-meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, ([NiIIL2]2+), and the physical and chemical stability of the ceramic materials using the sol–gel process to entrap the complexes. The entrapment by the biphasic sol–gel method is based on non-covalent bonds between the matrix and the complex; therefore the main problem was leaching. Parameters controlling the leaching were investigated. Redox cycles with the reducing agent ascorbic acid, and persulfate as the oxidizing agent were performed.

Ancillary