Wang Zhong-Xia, Gao Yuan-Fei, Yu Xian-He, Balasubramanian Paramasivam, Kong Fen-Ying, Wang Wei, Chen Wei, Peng Hua-Ping
School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, PR China.
Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350108, PR China.
Talanta. 2021 May 1;226:122067. doi: 10.1016/j.talanta.2020.122067. Epub 2021 Jan 9.
The preparation of boron-carbon-oxygen (BCO)-based heterostructure needs commonly high temperature, high pressure and/or auxiliary strong oxidant. And the BCO-based probe for the sensing application is still rare owing to their few active groups, low quantum yield or missing specificity. Exploring BCO-based heterostructured probe via simple routes and application in sensing, therefore, is highly challenging. Herein, we proposed a novel boron-carbon-phosphorus-oxygen (BCPO) nanodot with phosphate tunable near-ultraviolet emission performance and narrow full width at half maximum by a facile, green and gentle synthesis process. The BCPO not only exhibits a distinctive colorimetric response to 6-mercaptopurine (6-MP), but also displays 6-MP-sensitive photoluminescence quenching. Thus, dual detection channels for 6-MP based on BCPO probe have been developed, and the mechanism has been speculated. Enrichment-electron of the 6-MP can be adsorbed at the boron vacancy orbits of the BCPO by the chemical action. The formation of 6-MP/BCPO complexes trigger the efficient photoluminescence quenching and light-absorbing enhancing of the BCPO, owing to the synergistic effect of the acceptor-excited photo-induced electron/energy transfer, inner filter effect and p/π-π conjugated stacking. Furthermore, the presence of ClO anion efficaciously sparks the release of the 6-MP molecule from the 6-MP/BCPO complexes, thereby a rapid photo-switch of the BCPO for the 6-MP has been developed. Thus, this study can not only guide the further rational design of the BCPO probe, but also inspire the in-depth application of the BCPO and other nanomaterial-based probes.
基于硼 - 碳 - 氧（BCO）的异质结构的制备通常需要高温、高压和/或辅助强氧化剂。并且由于其活性基团少、量子产率低或缺乏特异性，用于传感应用的基于BCO的探针仍然很少见。因此，通过简单途径探索基于BCO的异质结构探针并将其应用于传感具有很大的挑战性。在此，我们通过一种简便、绿色且温和的合成过程，提出了一种新型的硼 - 碳 - 磷 - 氧（BCPO）纳米点，其具有磷酸盐可调谐的近紫外发射性能和窄的半高宽。BCPO不仅对6 - 巯基嘌呤（6 - MP）表现出独特的比色响应，还显示出对6 - MP敏感的光致发光猝灭。因此，基于BCPO探针开发了用于6 - MP的双检测通道，并推测了其机制。6 - MP的富集电子可以通过化学作用吸附在BCPO的硼空位轨道上。6 - MP/BCPO复合物的形成由于受体激发的光致电子/能量转移、内滤效应和p/π - π共轭堆积的协同作用，触发了BCPO有效的光致发光猝灭和吸光增强。此外，ClO阴离子的存在有效地引发了6 - MP分子从6 - MP/BCPO复合物中的释放，从而开发了一种用于6 - MP的BCPO快速光开关。因此，本研究不仅可以指导BCPO探针的进一步合理设计，还可以激发BCPO和其他基于纳米材料的探针的深入应用。
