Two boron-doped carbon dots (BCDs), CABA and TBBA, were prepared from various boron and carbon containing precursors using a bottom-up approach. The BCDs’ chemistry and morphology were evaluated by IR, XPS and TEM analyses. The surface of BCDs was rich in surface functional groups including CB, B–O, CO and CO bonds. Their optical properties were analyzed by UV–vis, excitation and fluorescence spectroscopy. BCDs solutions, when excited at 350 nm, emitted fluorescent light with a maximum at 420−430 nm (in a violet range). The excitation spectra of BCDs were deconvoluted into three components centered respectively at 250, at around 320 and at 350 nm. The excitation peak at 250 nm was linked to the CC bonds, the one around 320 nm - to the CB bonds and the one at 350 nm - to the CO/CO bonds. The calculated quantum yields varied between 1.7 and 9.5 %. The latter number corresponds to one of the best fluorescence quantum yields reported for BCDs. This study highlighted the importance of the surface chemistry and especially of the CB and CO/CO bonds in governing the photoluminescence of BCDs. The highest quantum yield was found for BCDs with a highcontribution of CB and COB bonds and a small contribution of CO bonds.

使用自下而上的方法，从各种含硼和碳的前体中制备了两个硼掺杂碳点（BCD）CA BA和TB BA。通过IR，XPS和TEM分析评估了BCD的化学和形态。BCD的表面富含表面官能团，包括C B，B-O，C O和C O键。通过紫外可见光谱，激发光谱和荧光光谱分析了它们的光学特性。BCDs溶液在350 nm激发时会发出最大420-430 nm（在紫色范围内）的荧光。BCD的激发光谱被解卷积为三个分量，分别以250、320和350 nm为中心。在250 nm处的激发峰与C C键有关，在320 nm附近的一个-与C有关。B键和一个在350 nm处的键-C O / C O键。计算的量子产率在1.7％和9.5％之间变化。后一个数字对应于BCD报道的最佳荧光量子产率之一。这项研究强调了表面化学，尤其是C B和C O / C O键在控制BCD的光致发光中的重要性。对于具有高贡献的C B和C O B键和少量的C O键的BCD，发现了最高的量子产率。