Polythiophene based fluorescence sensors for acids and metal ions
Polythiophene based fluorescence sensors for acids and metal ions
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DOI：
10.1016/j.snb.2009.07.008
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发表时间：
2009-09-07
影响因子：
8.4
通讯作者：
Dolui, Swapan Kumar
中科院分区：
文献类型：
--
作者：
Maiti, Jatindranath;Pokhrel, Binod;Dolui, Swapan Kumar
聚(噻吩-3-基-乙酸8-喹啉基酯)是一种荧光材料，在540 nm处显示荧光。在酸、金属离子、核苷酸和蛋白质（1-脯氨酸）存在下，研究了聚（噻吩-3-基-乙酸 8-喹啉酯）的荧光。加入HCl可猝灭聚合物的荧光，加入等量的碱可恢复荧光。计算得出 HCl 的 Stern-Volmer 猝灭系数为 141 M-1。此外，猝灭取决于HCl的浓度。类似地，聚合物的荧光被铜、镉和铅金属离子猝灭，并且猝灭对金属离子的浓度敏感。 Cu2+ 离子的 Stern-Volmer 猝灭系数为 2.285 x 10(3) M-1，Cd2+ 离子为 2.287 x 10(3) M-1，Ph2+ 离子为 3.7 x 10(4) M-1。在 Al3+、Zn2+、核仁和蛋白质（1-脯氨酸）中，荧光过度增强。 (C) 2009 Elsevier B.V. 保留所有权利。
Poly(thiophene-3-yl-acetic acid 8-quinolinyl ester) is a fluorescent material and it shows fluorescence at 540 nm. The fluorescence of poly (thiophene-3-yl-acetic acid 8-quinolinyl ester) has been studied in the presence of acids, metal ions, nucleotides and protein (1-proline). The fluorescence of polymer is quenched by the addition of HCI which could be recovered by the addition of equivalent amount of alkali. The Stern-Volmer quenching coefficient for HCI is calculated and found to be 141 M-1. Moreover quenching depends on concentration of HCI. Similarly, the fluorescence of polymer is quenched by copper, cadmium and lead metal ions and quenching is sensitive to concentrations of metal ions. The Stern-Volmer quenching coefficient is 2.285 x 10(3) M-1 for Cu2+ ions, 2.287 x 10(3) M-1 for Cd2+ ions and 3.7 x 10(4) M-1 for Ph2+ ions. In Al3+, Zn2+, nucleoticles and protein (1-proline), the fluorescence is exorbitantly increased. (C) 2009 Elsevier B.V. All rights reserved.