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Organic phototheranostics simultaneously having fluorescence in the second near‐infrared (NIR‐II, 1000–1700 nm) window, and photothermal and photodynamic functions possess great prospects in tumor diagnosis and therapy. However, such phototheranostics generally suffer from low brightness and poor photodynamic performance due to severe solvatochromism. Herein, an organic NIR‐II fluorophore AS1, which...
Traditional security inks relying on fluorescent/phosphorescent molecules are facing increasing risks of forgery or tampering due to their simple readout scheme (i.e., UV‐light irradiation) and the advancement of counterfeiting technologies. In this work, a multidimensional data‐encryption method based on non‐fluorescent polymers via a “lock–key” mechanism is developed. The non‐fluorescent invisible...