Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1039/c7sc04607c

Аннотация: In nanoscience, amphiphilic carbon dots (ACDs) are of great importance due to their excellent transferability for application in biological sensing, imaging and labelling. However, facile synthetic strategies are still limited, especially for obtaining high-emissive ACDs. Since the development of a high-emissive feature is stronglyПоказать полностьюdesired for improving the practical resolution in vivo, here we report a chemical strategy that uses rigid molecules to straightforwardly construct amphiphilic carbon dots (ACDs) with high luminescence quantum yields (QYs). By using 1-[bis(dimethylamino)methylene]-1H-1,2,3-Triazolo[4,5-b]pyridinium 3-oxide hexafluorophosphate (HATU), a typical coplanar compound, as the only precursor, well-defined ACDs were prepared via a one-step solvothermal process which exhibited a superior QY of up to 29%, largely superior to those prepared from precursors with less rigid structures. The effect can be mainly attributed to a significant suppression of the competition of non-radiative decay through rigidity derivation. Metal ionic doping during the synthesis resulted in a further improvement of the crystallinity and monodispersity of the materials, with retention of the high-emissive ability. This high-emissive photoluminescence behavior of the ACDs is accompanied with an excitation-wavelength dependence, a high biocompatibility and a low toxicity, which together make the ACDs advantageous for application in multi-channel bioimaging. © The Royal Society of Chemistry 2018.

Журнал: Chemical Science

Выпуск журнала: Vol. 9, Is. 5

Номера страниц: 1323-1329

ISSN журнала: 20416520

Издатель: Royal Society of Chemistry

• Zhao P. (State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, China)
• Li X. (State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, China)
• Baryshnikov G. (Division of Theoretical Chemistry, Biology School of Biotechnology, KTH Royal Institute of Technology, Stockholm, Sweden, Department of Chemistry and Nanomaterials Science, Bogdan Khmelnitsky National University, Cherkasy, Ukraine)
• Wu B. (State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, China)
• Ågren H. (Division of Theoretical Chemistry, Biology School of Biotechnology, KTH Royal Institute of Technology, Stockholm, Sweden, Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation)
• Zhang J. (Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, Shanghai, China)
• Zhu L. (State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, China)

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