A push-pull unsymmetrical subphthalocyanine dimerElectronic supplementary information (ESI) available. See DOI: 10.1039/c5sc01709b

A push-pull unsymmetrical subphthalocyanine dimerElectronic supplementary information (ESI) available. See DOI: 10.1039/c5sc01709b

Unsymmetrical subphthalocyanine fused dimers have been prepared from appropriate ortho -dinitrile SubPc precursors. In particular, either electron-donating or electron-accepting substituents have been introduced on each SubPc constituent unit, resulting in unprecedented push-pull π-extended curved a...

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Hauptverfasser: Zango, Germán, Zirzlmeier, Johannes, Claessens, Christian G, Clark, Timothy, Martínez-Díaz, M. Victoria, Guldi, Dirk M, Torres, Tomás
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creator Zango, Germán
Zirzlmeier, Johannes
Claessens, Christian G
Clark, Timothy
Martínez-Díaz, M. Victoria
Guldi, Dirk M
Torres, Tomás
description Unsymmetrical subphthalocyanine fused dimers have been prepared from appropriate ortho -dinitrile SubPc precursors. In particular, either electron-donating or electron-accepting substituents have been introduced on each SubPc constituent unit, resulting in unprecedented push-pull π-extended curved aromatic macrocycles. From fluorescence experiments in solvents of different polarity we conclude a dual fluorescence, namely a delocalized singlet excited state (1.73 eV) and a polarized charge transfer state (
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From fluorescence experiments in solvents of different polarity we conclude a dual fluorescence, namely a delocalized singlet excited state (1.73 eV) and a polarized charge transfer state (&lt;1.7 eV). Pump probe experiments corroborate the dual nature of the fluorescence. On one hand, the delocalized singlet excited state gives rise to a several nanosecond lasting intersystem crossing yielding the corresponding triplet excited state. On the other hand, the polarized charge transfer state deactivates within a few picosesonds. Visualization of the charge transfer state was accomplished by means of molecular modeling with a slight polarization of the HOMO towards the electron donor and of the LUMO towards the electron acceptor. 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title A push-pull unsymmetrical subphthalocyanine dimerElectronic supplementary information (ESI) available. See DOI: 10.1039/c5sc01709b
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