[ACS Applied Materials & Interfaces] Reaction driven self-assembled micellar nanoprobes for ratiometric fluorescence detection of CS2 with high selectivity and sensitivity
作者：Wei Lu, Peng Xiao, Zhenzhong Liu, JincuiGu, Jiawei Zhang*, Youju Huang, Qing Huang and Tao Chen*
關(guān)鍵字：carbon disulfide,dithiocarbamate,excimer emission, ratiometricfluorescent probe, self-assembled micellar nanoprobe
論文來源：期刊
具體來源：ACS Applied Materials & Interfaces, 2016, 8, 20100–20109
發(fā)表時(shí)間：2016年
.The detection of highly toxic CS2, which is
known as a notorious occupational hazard in various industrial processes, is
important from an environmental and a public safety perspective. We describe
here a robust type of chemical
reaction-based supramolecular fluorescent nanoprobes for ratiometric
determination of CS2 with high selectivity and sensitivity in water
medium. The micellar nanoprobes self-assemble from amphiphilicpyrene-modified hyperbranchedpolyethyleneimine (Py-HPEI) polymers with intense pyrene
excimer emission. Selective sensing is based on a CS2-specific reaction with hydrophilic amino groups to produce hydrophobic dithiocarbamate
moieties, which can strongly quench the pyrene excimer emission via a known
photoinduced electron transfer (PET) mechanism.Therefore, the developed micellar
nanoprobes are free of H2S-interferencing problem often countered in
the widely-used colorimetric assays and proved to show high selectivity over
many potentially competing chemical species. Importantly, the developed
approach is capable of CS2 sensing even in complex tap and river water samples. In addition, in view of the
modular design principle of these powerful micellar nanoprobes, the sensing
strategy used here is expected to be applicable to the development of
various sensory systems for other environmentally important guest species.