Copper complex ions: silicate

Complexed metal ion stabilized alkali metal polysilicates can also be used, such as copper ethylenediamine hydroxide stabilized sodium polysilicate made by mixing copper ethylenediamine with colloidal silica and then the silicate, or the stabilized polysilicates of U.S. Pat. No. 3,715,224. 

The second topic is an extension of the first one and was concerned with ESR studies of the Cu(I)-NO complexes. Copper ion exchanged high siliceous zeolites such as ZSM-5 and MCM-22 have been considered as a promising environmental catalyst for the NO decomposition. The Cu(I)-NO complex has attracted special interest because of its important intermediate in the catalytic NO decomposition. Poppl and other scientists have extensively applied multi frequency ESR, pulsed ENDOR and HYSCORE methods to clarify the local structure of Cu(I)-NO adsorption complexes. 

---