  We report that for the first time the nanoparticles of II-V semiconductor
(ZnP2) were prepared and studied. ZnP2 nanoparticles were prepared by
incorporation into zeolite Na-X matrix. Absorption, diffuse reflection (DR) and
photoluminescence (PL) spectra of the ZnP2 nanoclusters incorporated into the
supercages of zeolite Na-X were measured at the temperature 77 K. Five bands
B1-B5 are observed in both the DR and PL spectra demonstrating the blue shift
from the line of free exciton in bulk crystal. We attribute the B1-B5 bands to
some stable nanoclusters with size less than the size of zeolite Na-X
supercage. We observed Stokes shift of the PL bands from the respective
absorption bands. The nonmonotonic character of its dependence on the cluster
size can be explained as the result of competition of the Frank-Condon shift
and the shift due to electronic relaxation.
