A novel system for Fe3+ ion detection based on fluorescence resonance energy transfer

被引：75
作者：
Bozkurt, Ebru [1 ]
Arik, Mustafa [2 ]
Onganer, Yavuz [2 ]
机构：
[1] Ataturk Univ, Erzurum Vocat Training Sch, Program Occupat Hlth & Safety, TR-25240 Erzurum, Turkey
[2] Ataturk Univ, Fac Sci, Dept Chem, TR-25240 Erzurum, Turkey
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 221卷
关键词：
Coumarin; 120; Fluorescein; Fluorescence resonance energy transfer (FRET); Detection of Fe3+ ions; PHOTOPHYSICAL PROPERTIES; RHODAMINE-B; METAL-IONS; CHEMOSENSOR; RECOGNITION; SENSOR; PROBE; MEROCYANINE; ABSORPTION; CONJUGATE;
D O I：
10.1016/j.snb.2015.06.097
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A new sensor system was developed for metal-ion sensing based on fluorescence resonance energy transfer (FRET). FRET process was carried out between coumarin (C120) as the energy donor and fluorescein (FL) as the energy acceptor. The concentration most suitable for FRET efficiency was determined to be 0.2 mu M for C120 and 20 mu M for FL. The effects of various metal ions such as Li+, Na+, Ag+, Zn2+, Pb2+, Mn2+, Hg2+, Cu2+, Cd2+, Fe3+, Cr3+ and Al3+ on the energy transfer between the C120 and FL were explored. It was observed that the presence of Fe3+ ions inhibited the energy transfer between the two molecules while the other metal ions did not affect. This observation shows that the C120-FL system could be selectively detected for Fe3+ ions. The detection limit and binding constant of Fe3+ were determined as 2.54 mu M and 4.33 x 10(4) M-1, respectively. The C120-FL system has a good potential for a sensor application in analytical systems due to its high selectivity for Fe3+. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：136 / 147
页数：12
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