Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 5, Issue 14, Pages -Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tc00281e
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Funding
- Dutch Ministry of Education, Culture and Science [024.001.035]
- Netherlands Organisation for Scientific Research (NWO) [TOP-PUNT 718.014.003]
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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 pi-stacking and H-bonding interactions, leading to excimer formation. High emission anisotropy factors g(lum), around vertical bar 1-2 vertical bar x 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.
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