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À propos de : Photoinduced Energy Transfer Processes within Dyads ofMetallophthalocyanines Compactly Fused to a Ruthenium(II)Polypyridine Chromophore        

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  • Photoinduced Energy Transfer Processes within Dyads ofMetallophthalocyanines Compactly Fused to a Ruthenium(II)Polypyridine Chromophore
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  • An unsymmetric, peripherally octasubstituted phthalocyanine (Pc) 1, which contains a combination ofdipyrido[3,2-f:2‘,3‘-h] quinoxaline and 3,5-di-tert-butylphenoxy substituents, has been obtained via astatistical condensation reaction of two corresponding phthalonitriles. Synthetic procedures for the selectivemetalation of the macrocyclic cavity and the periphery of 1 were developed, leading to the preparationof the key precursor metallophthalocyanines 3−5 in good yields. Two different strategies were appliedto the synthesis of compact dyads MPc−Ru(II) 6−8 (M = Mg(II), Co(II), Zn(II)). Intramolecular electronicinteractions in these dyads were studied by absorption, emission, and transient absorption spectroscopy.Upon photoexcitation, these dyads exhibit efficient intramolecular energy transfer from the Ru(II)chromophore to the MPc moiety.
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