A laterally π-expanded fluorone dye as an efficient near infrared fluorophore
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The synthesis and photophysical properties of new dibenzo[b,i]fluorone dye frameworks (BX and FBX) are described. Both BX and FBX display near-infrared sharp absorption and emission upon the addition of base due to the achievement of efficient π-conjugation based on the small bond alternation strategy.
The Royal Society of Chemistry