In this dissertation investigation of one of the existing ring-shaped polyoxomolybdates led to the formation of extended structures and alluded to their potential host functionalities. After realizing such potentials in ring-shaped as well as in spherical giant polyoxomolybdates, and studying the structure of water inside the spherical capsules, this dissertation investigated the stability of some selected spherical polyoxomolybdates in aqueous solution. From this study sites vulnerable to "attack" by degrading agents and hence responsible for their decomposition were proposed and also the role of cations in stabilizing these clusters emerged. The dissertation concludes with a perspective for some open questions regarding the generation of the giant polyoxomolybdates from an ionic soup.