Ultrabright Dibenzofluoran‐Based Polymer Dots with NIR‐IIa Emission Maxima and Unusual Large Stokes Shifts for 3D Rotational Stereo Imaging
Partha Chowdhury,
Zhao‐Yu Lu,
Shih‐Po Su
et al.
Abstract:Emerging organic molecules with emissions in the NIR‐II region are garnering significant attention. Unfortunately, achieving accountable organic emission intensity over the NIR‐IIa (1300 nm) region faces challenges due to the intrinsic energy gap law. Up to current stage, all reported organic NIR‐IIa emitters belong to polymethine‐based dyes with small Stokes shifts (< 50 nm) and low quantum yield (≤ 0.015%). However, such polymethines have proved to cause self‐absorption with constrained emission brightnes… Show more
The utilization of NIR-IIa Pdots has addressed critical limitations in deep-tissue imaging in the NIR-IIa region by utilizing the advantages of reduced light scattering, diminished autofluorescence, and decreased light absorption by biospecies.
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