Jump to main content
Jump to site search

Issue 11, 2018
Previous Article Next Article

Supramolecular complex of a fused zinc phthalocyanine–zinc porphyrin dyad assembled by two imidazole-C60 units: ultrafast photoevents

Author affiliations

Abstract

A new zinc phthalocyanine–zinc porphyrin dyad (ZnPc–ZnP) fused through a pyrazine ring has been synthesized as a receptor for imidazole-substituted C60 (C60Im) electron acceptor. Self-assembly via metal–ligand axial coordination and the pertinent association constants in solution were determined by 1H-NMR, UV-Vis and fluorescence titration experiments at room temperature. The designed host was able to bind up to two C60Im electron acceptor guest molecules to yield C60Im:ZnPc–ZnP:ImC60 donor–acceptor supramolecular complex. The spectral data showed that the two binding sites behave independently with binding constants similar in magnitude. Steady-state fluorescence studies were indicative of an efficient singlet–singlet energy transfer from zinc porphyrin to zinc phthalocyanine within the fused dyad. Accordingly, the transient absorption studies covering a wide timescale of femto-to-milli seconds revealed ultrafast energy transfer from 1ZnP* to ZnPc (kEnT ∼ 1012 s−1) in the fused dyad. Further, a photo induced electron transfer was observed in the supramolecularly assembled C60Im:ZnPc–ZnP:ImC60 donor–acceptor complex leading to charge separated states, which persisted for about 200 ns.

Graphical abstract: Supramolecular complex of a fused zinc phthalocyanine–zinc porphyrin dyad assembled by two imidazole-C60 units: ultrafast photoevents

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Jan 2018, accepted on 24 Feb 2018 and first published on 26 Feb 2018


Article type: Paper
DOI: 10.1039/C8CP00382C
Citation: Phys. Chem. Chem. Phys., 2018,20, 7798-7807
  •   Request permissions

    Supramolecular complex of a fused zinc phthalocyanine–zinc porphyrin dyad assembled by two imidazole-C60 units: ultrafast photoevents

    J. Follana-Berná, S. Seetharaman, L. Martín-Gomis, G. Charalambidis, A. Trapali, P. A. Karr, A. G. Coutsolelos, F. Fernández-Lázaro, F. D’Souza and Á. Sastre-Santos, Phys. Chem. Chem. Phys., 2018, 20, 7798
    DOI: 10.1039/C8CP00382C

Search articles by author

Spotlight

Advertisements