Journal
DYES AND PIGMENTS
Volume 197, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109929
Keywords
Triphenylamine; Benzothiophene; Stable radical cation; Near-infrared absorption; NIR-II dye
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A triphenylamine compound with three benzothiophene rings was synthesized with a high yield, showing absorption at 386 nm and NIR-II absorption at 1213 nm after one-electron oxidation. This compound demonstrated a high fluorescence quantum yield and thermostability.
A triphenylamine with three benzothiophene rings was designed and successfully synthesized in 87% yield. The compound showed absorption at 386 nm and blue emission at around 442 nm, with a fluorescence quantum yield of 0.57. The compound showed high thermostability. The radical cation obtained by one-electron oxidation was stable in solution and showed a significant absorption in the NIR-II region (lambda max = 1213 nm). DFT calculations confirmed the experimental data.
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