22-P-17-Electronic states and arrangements of AgI and CuI clusters incorporated into zeolite LTA

Abstract

Publisher Summary This chapter discusses the electronic states and arrangements of silver iodide (AgI) and copper iodide (CuI) clusters incorporated into zeolite LTA. Both AgI and CuI clusters are successfully incorporated into the cages of Na-type LTA. The maximum loading densities of the AgI and CuI molecules per α-cage are 4.0 and 6.3, respectively. In the optical spectra, the lowest absorption bands of both kinds of clusters show a large shift to the higher energy side compared to that of the original bulks. The space group of the original Na-LTA, Fm3c, changed to low symmetry ones by incorporation of both kinds of clusters. These are determined by the appearance of new reflections in the X-ray powder diffraction patterns. The physical properties of these two kinds of clusters are slightly different. CuI molecules adsorbed sparsely into the cage have the property to aggregate and form a cluster. The CuI clusters have large electron-vibration interaction.