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- Title
A Diradical Approach towards BODIPY-Based Dyes with Intense Near-Infrared Absorption around λ=1100 nm.
- Authors
Ni, Yong; Lee, Sangsu; Son, Minjung; Aratani, Naoki; Ishida, Masatoshi; Samanta, Animesh; Yamada, Hiroko; Chang, Young ‐ Tae; Furuta, Hiroyuki; Kim, Dongho; Wu, Jishan
- 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.
- Subjects
INFRARED absorption; ORGANIC dyes; QUINODIMETHANE; LIGHT absorption; ISOMERIZATION; ELECTROMAGNETIC spectrum
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 8, p2865
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201511151