Abstract
A chromophore-electroactive compound, Fe({eta}{sup 5}-C{sub 5}H{sub 4}PPh{sub 2}){sub 2}Pt(bph), where bph is the biphenyl dianion and Fe({eta}{sup 5}C{sub 5}H{sub 4}PPh{sub 2}){sub 2} is 1,1{prime}-bis(diphenylphosphino)ferrocene-P,P{prime} has been synthesized. The single-crystal X-ray structural characteristics of this heterobimetallic complex and its disolvated methylene chloride derivative are respectively as follows: empirical formula C{sub 46}H{sub 36}FeP{sub 2}Pt. An electrochemical study shows that the anodic potential for the oxidation of the ferrocenyl moiety of this compound increases by +0.13 V, compared to that for Fe({eta}{sup 5}-C{sub 5}H{sub 4}PPh{sub 2}){sub 2}. This change in oxidation potential agrees well with the change in energy of 0.11 eV for the d{pi}(Fe) {yields} {pi}{sup *}(Cp) MLCT transition upon coordination with Pt. The resultant excited state from the d{pi}(Pt) {yields} {pi}{sup *}(bph) MLCT transition is readily quenched by the ferrocenyl moiety unit as expected, and charge-separated redox-active centers are formed.
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