Bright, Color-Tunable Fluorescent Dyes in the Visible−Near-Infrared Region

Abstract

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.