A Novel Ratiometric Probe Based on Nitrogen-Doped Carbon Dots and Rhodamine B Isothiocyanate for Detection of Fe(3+) in Aqueous Solution.
A Novel Ratiometric Probe Based on Nitrogen-Doped Carbon Dots and Rhodamine B Isothiocyanate for Detection of Fe(3+) in Aqueous Solution.
复制标题
基于氮掺杂碳点和罗丹明 B 异硫氰酸盐的新型比率探针用于检测水溶液中的 Fe3
DOI：
10.1155/2016/4939582
复制
发表时间：
2016
影响因子：
2.6
通讯作者：
Han H
中科院分区：
文献类型：
--
作者：
Liu L;Chen L;Liang J;Liu L;Han H
以氮掺杂碳量子点（CD）和罗丹明B异硫氰酸盐（RhB）为探针，制备了一种测定三价铁离子（Fe 3+）的比率探针，并将其应用于PB缓冲溶液、湖水和自来水中Fe 3+的选择性检测。在传感系统中，FePO 4颗粒存款在CD表面，导致较大的颗粒和表面钝化。随着Fe ~（3+）的加入，CD的荧光强度和光散射强度逐渐增强，而RhB的荧光强度基本不变。在0.01-1.2 μM的动态范围内，CDs LS和RhB FL的比率光强度对Fe ~（3+）浓度有定量响应，检测限低至6 nM。其它金属离子如Fe ~（2+）、Al ~（3+）、K ~+、Ca ~（2+）、Co ~（2+）对Fe ~（3+）的测定无明显干扰。与传统的基于单信号探针的Fe 3+检测探针相比，基于双信号的比率探针对目标浓度具有更可靠和稳定的响应，并且具有在简单的荧光分光光度计中易于操作的特点。
A ratiometric probe for determining ferric ions (Fe3+) was developed based on nitrogen-doped carbon dots (CDs) and rhodamine B isothiocyanate (RhB), which was then applied to selective detection of Fe3+ in PB buffer solution, lake water, and tap water. In the sensing system, FePO4 particles deposit on the surface of CDs, resulting in larger particles and surface passivation. The fluorescence (FL) intensity and the light scattering (LS) intensity of CDs can be gradually enhanced with the addition of Fe3+, while the FL intensity of RhB remains constant. The ratiometric light intensity of CDs LS and RhB FL was quantitatively in response to Fe3+ concentrations in a dynamic range of 0.01–1.2 μM, with a detection limit as low as 6 nM. Other metal ions, such as Fe2+, Al3+, K+, Ca2+, and Co2+, had no significant interference on the determination of Fe3+. Compared with traditional probes based on single-signal probe for Fe3+ detection, this dual-signal-based ratiometric probe exhibits a more reliable and stable response on target concentration and is characterized by easy operation in a simple fluorescence spectrophotometer.