Issue 3, 2015

Design of UV-Vis-NIR panchromatic crown-phthalocyanines with controllable aggregation

Abstract

Novel magnesium and zinc phthalocyaninates, bearing four lateral electron-rich 15-crown-5-oxanthrene fragments, were synthesized starting from benzo-15-crown-5. Being almost insoluble in common organic solvents, these complexes could be solubilised by interaction with potassium acetate due to the formation of well-defined cofacial supramolecular dimers. A characteristic feature of these dimers is the presence of additional bands in their UV-Vis spectra, which affords the expansion of light absorption region up to ∼750 nm. This new band corresponds to the charge transfer from the peripheral groups to the Pc core, as evidenced by TDDFT calculations. Potassium cations can be reversibly removed from these dimers by [2.2.2]cryptand, resulting in the formation of monodisperse nanoparticles exhibiting absorbances up to 900 nm. This approach can be further used for the fabrication of nanostructured optoelectronic materials based on the synthesized donor–acceptor panchromatic crown-phthalocyanines.

Graphical abstract: Design of UV-Vis-NIR panchromatic crown-phthalocyanines with controllable aggregation

Supplementary files

Article information

Article type
Paper
Submitted
10 Sep 2014
Accepted
05 Nov 2014
First published
06 Nov 2014

Dalton Trans., 2015,44, 1366-1378

Author version available

Design of UV-Vis-NIR panchromatic crown-phthalocyanines with controllable aggregation

E. A. Safonova, A. G. Martynov, V. I. Zolotarevskii, S. E. Nefedov, Y. G. Gorbunova and A. Yu. Tsivadze, Dalton Trans., 2015, 44, 1366 DOI: 10.1039/C4DT02759K

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