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Fluorescent carbon dots (CDs) were successfully synthesized via pyrolysis of Setcreasea purpurea boom, providing a simple and convenient method for the preparation of CDs without using toxic or expensive materials.… Click to show full abstract
Fluorescent carbon dots (CDs) were successfully synthesized via pyrolysis of Setcreasea purpurea boom, providing a simple and convenient method for the preparation of CDs without using toxic or expensive materials. The as-synthesized CDs exhibit excellent water-soluble property, good photostability, and higher fluorescence quantum yield (18%), which makes the as-obtained CDs serve as fluorescent inks for printing luminescent patterns for anti-counterfeiting. In addition, the fabricated CDs have sensitive and selective response to molecular bromine (Br2) and have been successfully used for the detection of Br2 in brine, which is based on the Br2-induced fluorescence quenching of CDs. According to UV-visible and transient state fluorescence spectroscopy, the fluorescence quenching of as-prepared CDs was due to the dynamic collision between the CDs and Br2.
Journal Title: Analytical Methods
Year Published: 2018
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