Luo Tao, Wang Xiaobo, Qian Yuting, Liu Junjie, Li Lequn, Liu Jiyang, Chen Jie
Affiliated Tumor Hospital of Guangxi Medical University 71 Hedi Road Nanning 530021 PR China
Department of Chemistry, Zhejiang Sci-Tech University 928 Second Avenue, Xiasha Higher Education Zone Hangzhou 310018 PR China
RSC Adv. 2019 Nov 15;9(64):37484-37490. doi: 10.1039/c9ra07701d. eCollection 2019 Nov 13.
Despite widely reported fluorescence sensors for cations, direct detection of anions is nevertheless still rare. In this work, ionic liquid-functionalized fluorescent carbon nanoribbons (IL-CNRs) are one-step synthesized and serve as the fluorescent probes for direct and sensitive detection of sulfide ions (S). The IL-CNRs are synthesized based on electrochemical exfoliation of graphite rods in a water-IL biphasic system. The as-prepared IL-CNRs exhibit uniform structure, high crystallinity, strong blue fluorescence (absolute photoluminescence quantum yield of 11.4%), and unique selectivity towards S. Based on the fluorescence quenching of IL-CNRs by S, a fluorescence sensor is developed for direct, rapid and sensitive detection of S in the range of 100 nM to 1 μM and 1-300 μM with a low detection limit (LOD, 85 nM). Moreover, detection of S in a real sample (tap water) is also demonstrated.
尽管阳离子荧光传感器的报道很多，但阴离子的直接检测仍然很少见。在这项工作中，离子液体功能化荧光碳纳米带（IL-CNRs）通过一步合成法制备，并用作直接灵敏检测硫离子（S²⁻）的荧光探针。IL-CNRs是在水-离子液体双相体系中通过石墨棒的电化学剥离合成的。所制备的IL-CNRs具有均匀的结构、高结晶度、强蓝色荧光（绝对光致发光量子产率为11.4%）以及对S²⁻独特的选择性。基于S²⁻对IL-CNRs的荧光猝灭，开发了一种荧光传感器，用于直接、快速且灵敏地检测浓度范围为100 nM至1 μM和1 - 300 μM的S²⁻，检测限低（LOD，85 nM）。此外，还展示了对实际样品（自来水）中S²⁻的检测。
