A New Fluoride Luminescence Quencher Based on a Nanostructured Covalently Bonded Terbium Hybrid Material

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• 作者：Qianming Wang ; Chaoliang Tan ; Hongyu Chen ; Hitoshi Tamiaki
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：August 19, 2010
• 年：2010
• 卷：114
• 期：32
• 页码：13879-13883
• 全文大小：312K
• 年卷期：v.114,no.32(August 19, 2010)
• ISSN：1932-7455

文摘

The preparation of a novel covalently bonded luminescent hybrid material and its spectrophotometric anion sensing property were reported. The fluorescent receptor (lanthanide complex) was embedded in mesoporous silica through a sol−gel approach, and the nanoscale rod material exhibited excellent photophysical properties (luminescence and thermal stability). It shows significant changes in its fluorescence upon hydrogen binding to fluoride ions in DMSO/H₂O (1/1), and the luminescence varies from green to blue (3−4 s). Proton NMR titration studies also indicated that the organic ligand was participating in hydrogen-bonding interactions with fluoride guest anions. The detection limit for fluoride anions could reach 1 μM, and the reusability cycles were performed more than 10 times.