Abstract
The fluorescence solvatochromism of p-phenylenediamine-derived carbon dots (CDs) was modulated through surface modification with decanoic acid or perfluorodecanoic acid. This is attributed to the adjustment of the dipole interaction between solvent molecules and the CD surface in terms of steric hindrance of a surface modifier and polarization of the modified CD surface.
Highlights
The fluorescence solvatochromism of p-phenylenediamine-derived carbon dots (CDs) was modulated through surface modification with decanoic acid or perfluorodecanoic acid
We propose a novel strategy for controlling the fluorescence solvatochromism of CDs through surface modification
The perfluorodecanoic acid (PFDA)-CD dispersions exhibited yellow and blue emission in chloroform and methanol, respectively. These results revealed that such emission colour changes due to fluorescence solvatochromism depended on solvent polarity and surface modification
Summary
The fluorescence solvatochromism of p-phenylenediamine-derived carbon dots (CDs) was modulated through surface modification with decanoic acid or perfluorodecanoic acid. The normalized PL spectra of the CD, DA-CD, and PFDA-CD dispersions in chloroform and methanol (25 mg LÀ1) under 365 nm excitation are shown in Fig. S5 (ESI†).
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