A viscosity-sensitive fluorescent probe is demonstrated by grafting a rotatable 4-N,N'-dimethylaniline group on (6,5) single-walled carbon nanotubes. The rotation of the grafted group is constricted by solution viscosity, causing changes in the photoluminescence behaviors of the nanotubes. This enables a highly sensitive fluorescent probe for determining solution ratiometric viscosity in the biologically transparent second near-infrared region.
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| http://dx.doi.org/10.1039/d0cc02813d | DOI Listing |
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