OBSERVATION OF ABSORBED NO IN THE GAS-SOLID REACTION PROCESS BETWEEN NO AND LABASRCU2O6-DELTA

The absorption of NO onto LaBaSrCu2O6-delta is investigated by electro n energy-loss spectroscopy and X-ray photoelectron spectroscopy. The r esults suggest that electron transfer from Cu-O planes to absorbed NO takes place and indicate the formation of chemisorbed states of NO- on the oxide surface. It is shown that the NO adsorption into the layere d cuprate is related to the charge-transfer type electron structure of the cuprates. Also, it is considered that formation of the NO2- group corresponding to adsorbed NO- trapped by oxygen vacancies on the surf ace, and subsequent solution of N+ ions play an important role in the gas-solid reaction between NO and double-layer cuprates.