| 咔唑腙为荧光指示剂的亚硝酸根传感器 |
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| 引用本文： | 焦晨旭,焦东旭. 咔唑腙为荧光指示剂的亚硝酸根传感器[J]. 中北大学学报(自然科学版), 2010, 31(1): 34-39 |
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| 作者姓名： | 焦晨旭 焦东旭 |
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| 作者单位： | 中北大学,理学院,山西,太原,030051;山西省高平市环境监测站,山西,高平,048400 |
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| 基金项目： | 山西省自然科学基金资助项目(2009011015-2) |
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| 摘 要： | 合成了一种共轭的咔唑二聚体荧光载体9-乙基-3-咔唑亚甲基-咔唑腙(ECCH),用PVC包埋的方法可以将它固定在光纤传感器的表面,在溶液pH值为2.0时,亚硝酸根(NO2-)与过量的碘离子(I-)反应生成的碘三离子(I3-)能猝灭此ECCH光极膜的荧光.得到了可以检测NO2-的传感器,并讨论了此传感器的传感机理.传感器具有较好的稳定性、重现性和选择性,使用寿命长等优点.NO2-测定的线性范围为1.0×10-6~1.0×10-4mol.L-1;检出限为4.0×10-7mol.L-1.将传感器用于水样中NO-2的直接测定,回收率在96.0%~103.6%.
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| 关 键 词： | 咔唑二聚体 荧光传感器 亚硝酸根 |
Carbazole Hydrazone as Fluorescence Sensor for Nitrite |
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| JIAO Chen-xu,JIAO Dong-xu. Carbazole Hydrazone as Fluorescence Sensor for Nitrite[J]. Journal of North University of China, 2010, 31(1): 34-39 |
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| Authors: | JIAO Chen-xu JIAO Dong-xu |
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| Affiliation: | 1.School of Science;North University of China;Taiyuan 030051;China;2.Environment Monitoring Station;Gaoping 048400;China |
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| Abstract: | A fluorescence carrier carbazole derivative 9-ethyl3-carbazylidene carbazole hydrazone(ECCH) with conjugated two carbazole ring has been synthesized.It can be fixed on the surface of optical fibre sensor to prepare a fluorescent sensor by PVC embedding method.When the solution pH value is 2.0,the reaction between nitrite(NO-2) and superfluous I-to form I3 which can quench the fluorescence of carbazole derivative and use in the sensor for the determination of NO-2.The quenching mechanism is discussed.The sen... |
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| Keywords: | carbazole dimer fluorescence sensor nitrite |
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