[Sensors Actuators: B. Chem.] A water-soluble near-infrared (NIR) fluorescence activation probe for efficient detection of dissolved carbon dioxide
writer：Wei Lu, Chunxin Ma, Zhaowen Li, Jiawei Zhang*, Youju Huang, Qing Huang, Tao Chen*?
keywords：Dissolved carbon dioxide; Excimer emission; Optical sensors; Near-infrared fluorescence; Perylene bisimide
source：期刊
specific source：Sensors Actuators: B. Chem., 2017, 246, 631-637
Issue time：2017年
.A near-infrared (NIR)
fluorescent “turn-on” probe is presented for dissolved carbon dioxide (dCO2)
detection in aqueous medium. This
probe is based on perylene
bisimide-functionalized hyperbranched polyethylenimine (PBI-HPEI) polymer,
which exhibits typical NIR fluorescence
due to the excimer emission of π-π
stacked PBI fluorophores.
Both UV-Vis absorption and fluorescent spectroscopy studies reveal that the
PBI-HPEI polymer shows significantly dCO2-sensitive NIR emission via
a known photoinduced electron transfer (PET) mechanism. Importantly,
this sensory system is characterized with facile synthesis, fast response,
excellent water-solubility and wide linear detection concentration range. It is thus capable of detecting dCO2 even in real-world
carbonated beverages and drinking water samples. Additionally, in view of the
modular design principle of the present fluorescent polymer with typical NIR excimer emission of π-π stacked PBI
molecules, the proposed strategy is expected to be applicable to the fabrication of
novel versatile NIR-emitting sensory materials.