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Electrosynthesis,Characterization and Optical Sensing Application of Amino Acid Functionalized Polyfluorene

Chinese Journal of Polymer Science 2016年第2期34卷 229-241页

作者： Hui Zhang Ge Zhang 徐景坤文阳平 Wan-chuan Ding Jie Zhang Shou-li Ming Shi-jie Zhen Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal UniversityNanchang 330013China Key Laboratory of Applied Chemistry Jiangxi Agricultural UniversityNanchang 330045China

An amino acid side chain functionalized polyfluorene derivative poly[N-（9-fluorenylmethoxycarbonyl）-glycine] （P9FG） was facilely electrosynthesized and characterized, and the structure, properties and optical sensing application of the obtained polymer were described and discussed. The electropolymerization occurred at C2 and C7 positions.of fluorene units, and amino acid side chain groups were not cleaved from polyfluorene backbone in mixed electrolytes of boron trifluoride diethyl etherate and dichloromethane. Thermal analysis demonstrated good thermal stability of P9FG. Fluorescent spectra indicated that P9FG was a good blue light emitting material that could be employed as optical sensors. The soluble P9FG as a turn-off fluorescent sensor could realize the detection of Fe^3＋, Cu^2＋ and Cr2O7^2-, respectively. In addition, P9FG as a turn-off ultraviolet sensor could realize the detection of Cu^2＋ while as turn-on ultraviolet sensors could also realize the determination of Fe^3＋ and Cr2072-, respectively. All results indicate that P9FG is a promising candidate for optical sensing.

关键词： Conjugated polymers Polyfluorene derivatives Electropolymerization Optical sensors metal ions.

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A Compact System of Capacitively Coupled Contactless Conductivity Detection Based on the Square Wave Excitation Signal for Capillary Electrophoresis

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Chinese Chemical Letters 2006年第9期17卷 1229-1232页

作者： Shui Feng ZHANG Li Shi WANG Zhi DANG College of Environmental Science and Engineering South China University of Technology Guangzhou 510640

This paper reported a compact system of capacitively coupled contactless conductivity detection （C4D） based on the square wave excitation voltage for capillary electrophoresis, and it exhibited excellent sensitivity at the optimal frequency of 198 kHz. The feasibility and sensitivity of this detector was demonstrated by simultaneous detection of thirteen ions.including alkali, alkaline earth and heavy metal ions. And the detection limits （S/N 3） were in the range of 0.2-1μmol/L for Mn^2＋, K^＋, Na^＋, Mg^2＋, Ca^2＋, Li^＋, Ba^2＋, and 7-25 μmol/L for Ni^2＋, Cu^2＋, Cd^2＋, Pb^2＋, Co^2＋, Zn^2＋.

关键词： Capillary electrophoresis square wave excitation signal contactless conductivitydetector metal ions.

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A Simple Bioassay Using Fluorescent Microbeads and Daphnia magna

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Journal of Environmental Science and Engineering 2011年第12期5卷 1613-1616页

作者： M. Kamaya M. Sonamoto K. Nagashima E.N. Ginatullina Department of Environmental and Energy Chemistry Faculty of Engineering Kogakuin University Hachioji-City 192-0015 Japan

The amount of microbeads ingested by Daphnia magna decreases on exposure to toxic materials; tins oenawor was used to develop a toxicity test. To determine the toxicity of seven metals, D. magna were collected and homogenized, and the fluorescence intensity of the microbeads ingested by D. magna was measured. The amount of ingestion was determined from fluorescence intensity. The fluorescence intensity was half of that of the controls which was measured as the 30 min-FI50, and these data correlated well with those from an acute immobilization method （24 h-EC50）. An advantage of the method using fluorescent beads is that an estimate of the 24 h-EC50 can be obtained.

关键词： Bioassay Daphnia magna ingestion of fluorescent microbeads metal ions.

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