Iron-carbonyl dusters

Nagy et al. [127] used thermal decomposition of [Fe(CO)s] sorbed in HY zeolite to form highly dispersed iron partides, which were observed by transmission electron microscopy to be 10-50 A in size. Photodiemical decomposition gave smaller partides (too small to be observed with transmission electron micros-copy), presumaUy because of the strong interaction between the carbonyl dusters and the surface resulting from the eledronic exdtation of the metal carbonyl during decomposition. 

Even within the field of inorganic chemistry, the term duster is used to designate a wide variety of molecular entities. The boranes (e. g. [Bi2Hi2] ) the basic Fe4S4 unit contained in the iron-sulphur proteins, the transition metal carbonyls (e.g. [Nis(CO)i2] "), the metal-only clusters like Big, Geg ", and... 

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