A Diradical Approach towards BODIPY-Based Dyes with Intense Near-Infrared Absorption around λ=1100 nm

Yong Ni, Sangsu Lee, Minjung Son, Naoki Aratani, Masatoshi Ishida, Animesh Samanta, Hiroko Yamada, Young Tae Chang, Hiroyuki Furuta, Dongho Kim, Jishan Wu

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

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 languageEnglish
Pages (from-to)2815-2819
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number8
DOIs
Publication statusPublished - 2016 Feb 18

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