Abstract
A diradical approach to obtain stable organic dyes with intense absorption around λ=1100 nm is reported. The para- and meta-quinodimethane-bridged BODIPY dimers BD-1 and BD-2 were synthesized and were found to have a small amount of diradical character. These molecules exhibited very intense absorption at λ=1088 nm (ɛ=6.65×105 M−1 cm−1) and 1136 nm (ɛ=6.44×105 M−1 cm−1), respectively, together with large two-photon-absorption cross-sections. Structural isomerization induced little variation in their diradical character but distinctive differences in their physical properties. Moreover, the compounds showed a selective fluorescence turn-on response in the presence of the hydroxyl radical but not with other reactive oxygen species.
| Original language | English |
|---|---|
| Pages (from-to) | 2815-2819 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 55 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2016 Feb 18 |
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Ni, Y., Lee, S., Son, M., Aratani, N., Ishida, M., Samanta, A., Yamada, H., Chang, Y. T., Furuta, H., Kim, D., & Wu, J. (2016). A Diradical Approach towards BODIPY-Based Dyes with Intense Near-Infrared Absorption around λ=1100 nm. Angewandte Chemie - International Edition, 55(8), 2815-2819. https://doi.org/10.1002/anie.201511151