Molecular Imprinting in Fluorescent Particle Stabilized Pickering Emulsion for Selective and Sensitive Optosensing of 位-Cyhalothrin

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• 作者：Chunbo Liu ; Zhilong Song ; Jianming Pan ; Xiao Wei ; Lin Gao ; Yongsheng Yan ; Linzi Li ; Juan Wang ; Rui Chen ; Jiangdong Dai ; Ping Yu
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：May 23, 2013
• 年：2013
• 卷：117
• 期：20
• 页码：10445-10453
• 全文大小：536K
• 年卷期：v.117,no.20(May 23, 2013)
• ISSN：1932-7455

文摘

A red luminescent europium (Eu) complex covalently modified mesoporous silica spheres (mSiO₂鈥揈u(TTA)₃Bpc; TTA, 2-thenoyltrifluoroacetone; Bpc, 2,2鈥?bipyridine-4,4鈥?dicarboxylic acid) were designed. Then the molecularly imprinted polymers combined with fluorescence sensor were first prepared via mSiO₂鈥揈u(TTA)₃Bpc stabilized Pickering emulsion polymerization, and were further applied for selective and sensitive optosensing of 位-cyhalothrin (LC). The as-prepared mSiO₂鈥揈u(TTA)₃Bpc@MIPs were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and elemental analyzer, the results demonstrated the formation of monodisperse and uniform-sized LC-imprinted spheres. Meanwhile, fluorescence spectroscopy was used to evaluation of optical stability, effect of pH, and selective and sensitive determination of LC. The fluorescent intensity of mSiO₂鈥揈u(TTA)₃Bpc@MIPs decreased in the first 5 days and then kept stable for nearly a month. Under optical conditions, mSiO₂鈥揈u(TTA)₃Bpc@MIPs were successfully applied to selectively and sensitively detect LC in water, and a linear relationship could be obtained covering the concentration range of 10鈥?000 渭M with a correlation coefficient of 0.9986. Moreover, LC could quench the luminescence of mSiO₂鈥揈u(TTA)₃Bpc@MIPs in a concentration-dependent manner, which was best described by a Stern鈥揤olmer-type equation.