| Title: | Phenothiazine-based oligomers as novel fluorescence probes for detecting vapor-phase nitro compounds |
| Author(s): | Zhang X; Qiu X; Lu R; Zhou H; Xue P; Liu X; |
| Address: | "State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China" |
| DOI: | 10.1016/j.talanta.2010.08.016 |
| ISSN/ISBN: | 1873-3573 (Electronic) 0039-9140 (Linking) |
| Abstract: | "To meet the need for rapid and low-cost chemical sensing of explosive, new fluorescence chemosensors based on oligophenothiazines for probing vapor-phase nitro compounds have been developed. The phenothiazine-based trimer P3 and pentamer P5 have been synthesized via Heck and Wittig reactions by convergent approach. It was found that they can detect the vapors of nitro compounds, including p-nitrotoluene (p-NT), 2,4-dinitrotoluene (DNT), 2,4,6-trinitrotoluene (TNT) with good sensitivity and reversibility. And the sensor of P3 film gave a linear fluorescence quenching response to 7-800 ppb TNT with the detection limit of 4 ppb. For DNT vapor, a linear working range of the sensor was 2-24 ppm with the detection limit of 40 ppb. Meanwhile, the interferents, including common organic solvents, p-nitrophenol and 2,4-dinitrophenylhydrazine cannot lead to obvious fluorescence quenching, meaning that the film based on oligophenothiazines exhibited good specificity of fluorescence response to explosive. Based on the fluorescence lifetime and UV-vis absorption measurements, we suggested that the fluorescence quenching of oligophenothiazine-based films exposed to the vapors of nitro compounds was due to the formation of non-fluorescent charge-transfer complex between oligophenothiazine and nitro compounds" |
| Keywords: | Calibration Fluorescent Dyes/chemical synthesis/*chemistry Limit of Detection Magnetic Resonance Spectroscopy Molecular Structure Nitro Compounds/*analysis/chemistry Phase Transition Phenothiazines/chemical synthesis/*chemistry Polymers/chemical synthesis; |
| Notes: | "MedlineZhang, Xiaofei Qiu, Xianping Lu, Ran Zhou, Huipeng Xue, Pengchong Liu, Xingliang eng Research Support, Non-U.S. Gov't Netherlands 2010/09/30 Talanta. 2010 Oct 15; 82(5):1943-9. doi: 10.1016/j.talanta.2010.08.016. Epub 2010 Aug 21" |
