A squaraine-based near-infrared dye with bright fluorescence and solvatochromic property

Keitaro Umezawa, Daniel Citterio, Koji Suzuki

Research output: Contribution to journalArticle

15 Citations (Scopus)


We report a newly synthesized squaraine-based fluorescent dye (KSQ-2) with excellent and useful optical characteristics such as a sharp near-infrared (NIR) emission at 751 nm, an extremely high fluorescence quantum yield (φ = 0.56 in cyclohexane), and linear positive solvatochromic properties in the spectral region around 780 nm.

Original languageEnglish
Pages (from-to)1424-1425
Number of pages2
JournalChemistry Letters
Issue number12
Publication statusPublished - 2007 Dec 5


ASJC Scopus subject areas

  • Chemistry(all)

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