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Highly circularly polarized broad-band emission from chiral naphthalene diimide-based supramolecular aggregates

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Abstract

We report off-white circularly polarized luminescence (CPL) from supramolecular aggregates formed by a chiral carboxylic acid-functionalized naphthalene diimide. The self-assembly behaviour and the stability of the aggregates in solution were assessed by variable-temperature UV-Vis and electronic circular dichroism experiments. The observed 200 nm-wide emission band is unusual for a single chromophore and is a consequence of the supramolecular ordering due to a combination of π-stacking and H-bonding interactions, leading to excimer formation. High emission anisotropy factors glum, around |1–2| × 10−2, were observed over the whole spectrum in chlorinated/hydrocarbon solvent mixtures, as well as in thin films. These values are one order of magnitude higher than those of most chiral self-assembled fluorophores and other common small organic emitters.

Graphical abstract: Highly circularly polarized broad-band emission from chiral naphthalene diimide-based supramolecular aggregates

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Publication details

The article was received on 17 Jan 2017, accepted on 13 Mar 2017, published on 14 Mar 2017 and first published online on 14 Mar 2017


Article type: Paper
DOI: 10.1039/C7TC00281E
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Highly circularly polarized broad-band emission from chiral naphthalene diimide-based supramolecular aggregates

    F. Salerno, J. A. Berrocal, A. T. Haedler, F. Zinna, E. W. Meijer and L. Di Bari, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC00281E

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