Tunable multicolor carbon dots prepared from well-defined polythiophene derivatives and their emission mechanism
Liang Guo1, Jiechao Ge2, Weimin Liu2
1Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. jchge2010@mail.ipc.ac.cn and University of Chinese Academy of Sciences, Beijing, 100049, China.
Abstract:
Various functional precursors based on polythiophene derivatives are designed to prepare carbon dots (C-dots) with tunable emissions ranging from blue to near-infrared (NIR) at a single excitation wavelength (400 nm). The as-prepared C-dots demonstrate homogeneous size, superior optical properties, excellent water solubility, and low cytotoxicity. Thus, the C-dots are candidates for bio-imaging. A tunable photoluminescence mechanism is proposed to result from variations in the surface state and N content.
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