State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130012, PR China.
Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chunchon 24341, Republic of Korea.
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Apr 15;195:172-175. doi: 10.1016/j.saa.2018.01.073. Epub 2018 Jan 31.
With the explosive application of methyl salicylate (MS) molecules in food and cosmetics, the further detection of MS molecules becomes particularly important. Here we investigated the detection of MS molecules based on surface-enhanced Raman scattering (SERS) in a novel molecule/assistant/metal system constructed with MS, 4,4'-(hexafluoroisopropylidene) bis (benzoic acid) and Ag nanoparticles (AgNPs). The minimum detection concentration is 10 M. To explore the function of assisted reagent, we also referred another system without assistant molecules. The result demonstrates that SERS signals were not acquired, which proves that the assistant molecules are critical for the capture of MS molecules. Two possible mechanisms of MS/assistant/AgNPs system were speculated through two patterns of hydrogen bonds. The linker molecules acted as the role of the bridge between metallic substrates and target molecules through the molecular recognition. This strategy is very beneficial to the expanding of MS detection techniques and other hydrogen bond based coupling detections with SERS.
随着甲基水杨酸酯（MS）分子在食品和化妆品中的爆炸式应用，对 MS 分子的进一步检测变得尤为重要。在这里，我们研究了基于 MS、4,4'-(六氟异丙基)双（苯甲酸）和 Ag 纳米粒子（AgNPs）构建的新型分子/辅助剂/金属体系中表面增强拉曼散射（SERS）对 MS 分子的检测。最低检测浓度为 10M。为了探索辅助试剂的功能，我们还参考了另一个没有辅助分子的体系。结果表明，没有获得 SERS 信号，这证明了辅助分子对 MS 分子的捕获至关重要。通过氢键的两种模式推测了 MS/辅助剂/AgNPs 体系的两种可能机制。连接分子通过分子识别充当金属基底和目标分子之间的桥梁。这种策略非常有利于 MS 检测技术的扩展以及其他基于氢键的与 SERS 耦合检测。
