日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

Zeolites are fascinated materials to stabilize nano-particles and clusters arranging with homogeneous size and high density, because their cages with well-defined inner size are arrayed periodically. We can easily suspect the sizes and the arrangements of the clusters depend on structural types of the zeolite frameworks. Recently, we found out arrangements and adsorption properties of AgI clusters in zeolites also depend on the type of alkali-metal counter cations. For instance, AgI clusters with two different sizes array alternatively in Naform LTA zeolite. Sizes and ionization energies of the alkali-metal cations might affect on these properties. A method of stabilizing AgI clusters and their structural and electronic properties are reviewed.