Bright, color-tunable fluorescent dyes in the visible-near-infrared region

Keitaro Umezawa, Yuki Nakamura, Hiroshi Makino, Daniel Citterio, Koji Suzuki

Research output: Contribution to journalArticlepeer-review

368 Citations (Scopus)


The newly synthesized Keio Fluors, which are based on boron-dipyrromethene (BDP), have excellent and useful optical properties: vivid colors and sharp emission in the visible-near-infrared region (583-738 nm), high quantum yields (Φ: 0.56-0.98), high extinction coefficients (185000-288000 M-1 cm-1), and good photostabilities. These optical properties are superior to many of the existing fluorescent dyes such as rhodamines, cyanines, or other BDP-based fluorescent dyes.

Original languageEnglish
Pages (from-to)1550-1551
Number of pages2
JournalJournal of the American Chemical Society
Issue number5
Publication statusPublished - 2008 Feb 6

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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