A Squaraine-based Near-infrared Dye with Bright Fluorescence and Solyatochromic Property

摘要

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