Wang Linlin, Choi Won Mook, Chung Jin Suk, Hur Seung Hyun
School of Chemical Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan, 44610, Republic of Korea.
Nanoscale Res Lett. 2020 Dec 3;15(1):222. doi: 10.1186/s11671-020-03453-3.
In this research, we report the green, blue, and orange color emitting N-doped carbon dots (CDs), which are being synthesized from ascorbic acid and o-/m-/p-phenylenediamine (o-PDA, m-PDA, and p-PDA, respectively). The effects of the solvent polarity and solution pH on the PL emission properties of the as-synthesized CDs have been systematically investigated. It has been observed that the PL emission of the as-synthesized CDs decreases with the increase in solvent polarity due to the greater agglomeration. The surface charge of CDs also shows prominent effects on the pH-dependent PL emission properties.
在本研究中，我们报道了由抗坏血酸与邻苯二胺、间苯二胺、对苯二胺（分别为o-PDA、m-PDA和p-PDA）合成的发出绿色、蓝色和橙色光的氮掺杂碳点（CDs）。系统研究了溶剂极性和溶液pH值对合成的CDs的光致发光（PL）发射特性的影响。据观察，由于团聚加剧，合成的CDs的PL发射随着溶剂极性的增加而降低。CDs的表面电荷对pH依赖的PL发射特性也有显著影响。
