Formation of a 'less stable' polyanion directed and protected by electrophilic internal surface functionalities of a capsule in growth: [{Mo6O19}(2-)subset of{(Mo72Fe30O252)-Fe-VI-O-III(ac)(20)(H2O)(92)}](4-)

摘要

The spherical capsule skeleton of the host - guest system [{Mo6O19}(2-)subset of{Mo-VI Fe-72(III) O-30(252)(CH3COO)(20)(H2O)(92)}](4-) 1a built up by 12 {( MoVI) MoVI 5} type pentagonal units linked by 30 Fe-III centers which span the unique icosahedral Archimedean solid, the icosidodecahedron - can now be constructed deliberately and with a simpler composition than before from an acidified aqueous molybdate solution containing the mentioned ( virtual) pentagonal units; the encapsulated hexamolybdate - normally not formed in water - is built up in an unprecedented way concomitant with capsule growth, while being directed by the corresponding internal electrophilic surface functionalities.