Silica Gel Bound Cyclam. Synthesis and Applications

Abstract

Several silica gels containing cyclam have been synthesized using three different methods. The first two methods imply the modification of a commercial silica gel while the latter involves a sol-gel approach. The macrocycle contents and the textural data of these materials are compared. The efficiency of [Co(cyclam)]²⁺ grafted onto silica for binding dioxygen is reported. Finally, N-functionalization of the macrocycle has been performed. Such modified silica gels might behave as highly selective ions exchangers.

Keywords::

• Silica gel
• Cyclam
• Cobalt complex
• Dioxygen
• N-functionalization