THE CLUSTERS CD-2(2-4(2+) IN ZEOLITE-A() AND CD)

The sorption of the vapour of elemental cadmium and zinc into Cd2+ ion -exchanged zeolite A leads to the formation of two cluster cations Cd- 2(2+) and Cd-4(2+). Raman bands at 29, 81 and 114 cm(-1) are assigned to a Cd-4(2+) cluster; the less abundant Cd-2(2+) is identified by its UV band at 226 nm. These Cd-x(2+) clusters are promising building blo cks for the fabrication of heavy-metal atomic-scale quantum wires in t he intracrystalline voids and channels of zeolite hosts. (C) 1998 Publ ished by Elsevier Science B.V. All rights reserved.