Investigation on the chirality mechanism of chiral carbon quantum dots derived from tryptophan |
| |
| Authors: | Yingying Wei Lin Chen Junli Wang Xuguang Liu Yongzhen Yang Shiping Yu |
| |
| Institution: | College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024 China.; Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024 China.; Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024 China ; Interventional Treatment Department, Second Hospital of Shanxi Medical University, Taiyuan 030001 China |
| |
| Abstract: | Chiral carbon quantum dots (CQDs) with chirality, fluorescence and biocompatibility were synthesized by a one-step method with l-/d-tryptophan (l-/d-Trp), as both carbon source and chiral source. Levogyration-/dextrorotation-CQDs (l-/d-CQDs) were characterized by transmission electron microscopy, Fourier transform infrared spectrometry, ultraviolet-visible absorption, excitation and emission spectrometry and circular dichroism (CD) spectrometry. Results show that l-CQDs and d-CQDs present similar spherical morphology, functional groups and optical properties. The CD signal, around 220, 240 and 290 nm are opposite and symmetric, which conclusively demonstrates that l-CQDs and d-CQDs are enantiomers. Besides the CD signal around 220 nm from the inheritance of l-/d-Trp, two new chiral signals around 240 and 290 nm were induced by chiral environment.To clarify the chirality mechanism of chiral CQDs prepared by l-/d-tryptophan, the chirality origin in CQD structure was revealed. |
| |
| Keywords: | |
|
|
