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SENSORS AND ACTUATORS B-CHEMICAL · 2018 · IF 5.667

A compact fluorescent probe based on o-phthalaldehyde for ultrasensitive detection of hydrazine in gas and solution phases

Yongbin Zhang,Yongfei Huang,Yongkang Yue,Jianbin Chao,Fangjun Huo,Caixia Yin

Because of the high toxicity of hydrazine, the development of ultrasensitive fluorescent probes for hydrazine has been challenging. In this work, an ultrasensitive fluorescent probe based on o -phthalaldehyde has been exploited for hydrazine. The probe was designed based on creating an efficient fluorophore by incorporating hydrazine into o -phthalaldehyde framework via an intermolecular condensation-cyclization reaction. The probe could quickly detect hydrazine and displayed a high sensitivity for hydrazine with a LOD of 1.9 nM (0.06 ppb), which is far below the U.S. Environmental Protection Agency standard (10 ppb). Moreover, the probe was successfully applied to the detection of hydrazine in real water samples and hydrazine vapor.

研究领域: 分析化学 · 环境监测 · 生物传感 · 分子探针 · 毒理学

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JOURNAL OF MATERIALS SCIENCE · 2015 ·Vol. 51 ·期 3 ·1363-1375 · IF 2.371

Novel multiwalled carbon nanotube grafted with polyethylene glycol-block-polystyrene nanohybrids: ATRP synthesis and detection of benzene vapor

Luo Yan-Ling,Bai Rui-Xue,Xu Feng,Chen Ya-Shao,Li Hua,Dai Si-Si,Ma Wen-Bo

Novel multiwalled carbon nanotube graft polyethylene glycol -block -polystyrene copolymer nanohybrids (MWCNTs- g -PEG- b -PS) were prepared via atom transfer radical polymerization using carboxylated MWCNTs (MWCNTs–COOH) as a conductive carrier. The chemical structure and the compositions of graft copolymer nanohybrids were characterized by Fourier transform infrared spectroscopy, Raman spectroscopy, thermogravimetry, and gas chromatography, and the morphologies and dispersion behavior were observed by ultraviolet visible spectrophotometer, scanning electron microscope, and transmission electron microscope etc. The MWCNTs- g -PEG- b -PS-grafted copolymer nanohybrids were fabricated into conductive composite thin film sensors to investigate their responsiveness to benzene vapor. The influence of the molecular weights or compositional ratios of PEG and PS blocks on the conductivity of the conducting polymer nanohybrids and responsibility towards benzene vapor was investigated. The conducting polymer nanohybrid film sensors were demonstrated to possess the characteristics of quick response and good restorability, repeatability, and stability.

CAS / MDL: 3033-62-3 3030-47-5

研究领域: 材料科学 · 化学工程 · 环境监测

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A compact fluorescent probe based on o-phthalaldehyde for ultrasensitive detection of hydrazine in gas and solution phases

Novel multiwalled carbon nanotube grafted with polyethylene glycol-block-polystyrene nanohybrids: ATRP synthesis and detection of benzene vapor