Synthesis and evaluation of a novel rhodamine B-based ‘off-on’ fluorescent chemosensor for the selective determination of Fe3+ ions

Synthesis and evaluation of a novel rhodamine B-based ‘off-on’ fluorescent chemosensor for the selective determination of Fe3+ ions
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用于选择性测定 Fe3 离子的新型罗丹明 B 型“关-开”荧光化学传感器的合成和评价

DOI:
10.1016/j.snb.2016.09.163
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发表时间:
2017-04
期刊:
Sensors and Actuators B: Chemical
影响因子:
--
通讯作者:
Jing Zhu
Jing Zhu
中科院分区:
其他
文献类型:
--
作者:
Hailang Chen;Xiaofeng Bao;Hai Shu;Baojing Zhou;Renlong Ye;Jing Zhu

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设计、合成并表征了一种新的罗丹明 B 衍生物,即 N1-(苯并[d]噻唑-2-基)-N4-(2-(3',6'-双(二乙氨基)-3-氧代螺[异吲哚啉-1,9'-xanthen]-2-基)乙基)马来酰亚胺(RDBSF),以开发一种新型化学传感器。紫外可见吸收和荧光光谱研究表明,在含有 30% MeCN 的 Tris-HCl 溶液(1 mM,pH = 7.4)中,RDBSF 通过与 Fe3+ 形成 1:1 络合物,在许多其他金属阳离子存在的情况下对 Fe3+ 表现出高灵敏度和选择性。溶液中 RDBSF 对 Fe3+ 的结合缔合常数 (Ka) 估计为 1.52 × 104 M−1。 RDBSF 对 Fe3+ 的检测限进一步确定为 11.6 nM。细胞内成像应用表明,RDBSF 可用作检测 HepG-2 细胞中 Fe3+ 的荧光探针。
A new rhodamine B derivative, namely, N1-(benzo[d]thiazol-2-yl)-N4-(2-(3′,6′-bis (diethylamino)-3-oxospiro[isoindoline-1,9′-xanthen]-2-yl)ethyl)malea-mide (RDBSF), was designed, synthesized, and structurally characterized to develop a new chemosensor. UV–vis absorption and fluorescence spectroscopic studies show that RDBSF exhibits high sensitivity and selectivity toward Fe3+ in the presence of many other metal cations in a Tris-HCl solution (1 mM, pH = 7.4) containing 30% MeCN by forming a 1:1 complex with Fe3+. The binding association constant (Ka) of RDBSF for Fe3+ was estimated as 1.52 × 104 M−1 in the solution. The detection limit of Fe3+ by RDBSF was further determined as 11.6 nM. Intracellular imaging applications demonstrated that RDBSF can be used as a fluorescent probe for the detection of Fe3+ in HepG-2 cells.
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