摘要

<正>Optical imaging in the second near-infrared (NIR-Ⅱ, 1000–1700 nm) window has a great utility in biological and medical sciences due to its low tissue scattering, high sensitivity and high spatio-temporal resolution. In the past decades, researchers have devoted to developing various inorganic rare-earth nanoparticles and organic dyes as NIR-Ⅱ fluorescent probes [1–4], which have a great potential in in vivo bioimaging and biosensing. However,