Abstract：
In this work, Cassia tora (C. tora) have been used as a template to synthesize green fluorescent C. tora molybdenum nanoclusters (C. tora-MoNCs) through a green chemistry approach. These C. tora-MoNCs showed a quantum yield (QY) of 7.72% and exhibited a significant emission peak at 498 nm when excited at 380 nm. The as-prepared C. tora-MoNCs had an average size of 3.48 ± 0.80 nm and showed different surface functionality. The as-synthesized C. tora-MoNCs were successfully identified the hydroxyl radical (•OH) via a fluorescence quenching mechanism. Also, fluorescence lifetime and Stern-Volmer proved that after the addition of •OH radicals it was quenched the fluorescence intensity via a static quenching mechanism. The limit of detection is 9.13 nM, and this approach was successfully utilized for sensing •OH radicals in water samples with a good recovery rate.
摘要：
在这项工作中,决明子(C.tora）已被用作合成绿色荧光C.tora钼纳米簇的模板（C.tora-MoNC)通过绿色化学方法。这些C.tora-MoNC表现出7.72%的量子产率(QY),并且当在380nm处激发时在498nm处表现出显著的发射峰。所制备的C.tora-MoNC具有3.48±0.80nm的平均尺寸并显示不同的表面官能度。所合成的C.tora-MoNC通过荧光猝灭机制成功地鉴定了羟基自由基(·OH)。此外，荧光寿命和Stern-Volmer证明，在添加•OH自由基后，它通过静态猝灭机制猝灭了荧光强度。检测限为9.13nM,该方法成功地用于检测水样中的•OH自由基，具有良好的回收率。
