Reversible Sol-to-Gel Transformation of Uracil Gelators: Specific Colorimetric and Fluorimetric Sensor for Fluoride Ions
作者:Ling-Bao Xing、Bing Yang、Xiao-Jun Wang、Jiu-Ju Wang、Bin Chen、Qianhong Wu、Hui-Xing Peng、Li-Ping Zhang、Chen-Ho Tung、Li-Zhu Wu
DOI:10.1021/la304920j
日期:2013.3.5
accompanying the disruption of the gelators. Spectroscopic study and 1H NMR titration experiment revealed that the deprotonation of the hydrogen atom on the N position of uracil moiety by fluoride ions is responsible for the recognition events, evidenced by immediate transformation from the sol phase to the gel state upon adding a small amount of a proton solvent, methanol. The process is reversible
使用有机芳族溶剂,环己烷,DMSO,乙醇和乙酸乙酯,获得了一种新型的基于尿嘧啶的蒽有机胶凝剂。通过场发射扫描电子显微镜和透射电子显微镜进一步表征。具体而言,伴随着胶凝剂的破坏,所得到的有机凝胶被证明是对氟离子具有高灵敏度和选择性的有希望的比色和荧光传感器。光谱研究和1 H NMR滴定实验表明,氢原子在N上的去质子化氟离子在尿嘧啶部分的位置是识别事件的原因,证据是在加入少量质子溶剂甲醇后立即从溶胶相转变为凝胶态。该过程是可逆的,即使经过五次运行,传感活性和溶胶-凝胶转化能力的损失也为零。