New switch on fluorescent probe with AIE characteristics for selective and reversible detection of mercury ion in aqueous solution
New switch on fluorescent probe with AIE characteristics for selective and reversible detection of mercury ion in aqueous solution
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具有 AIE 特性的新型荧光探针开关，用于选择性和可逆检测水溶液中的汞离子
DOI：
10.1016/j.ab.2019.113403
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发表时间：
2019
影响因子：
2.9
通讯作者：
Jianguo Wang
中科院分区：
文献类型：
--
作者：
Yanglei Yuan;Xin Chen;Qing Chen;Guoyu Jiang;Hongmei Wang;Jianguo Wang
采用简单的两步法合成了一种基于四苯乙烯衍生物的荧光探针（probe 2），该探针可选择性地开启并可逆地检测水溶液中的Hg 2+。探针2在水溶液中表现出微弱的发射，这是由于四个苯基转子的自由旋转促进了激发单重态的快速非辐射衰减。而与Hg 2+配位后，Hg 2+促进的聚集体形成，限制了分子内的旋转，阻断了非辐射途径，打开了发射通道，导致探针2对Hg 2+的响应为开启。探针2对Hg 2+具有较高的灵敏度和良好的选择性，检测限为45.4 nM。此外，检测可以是可逆的，通过随后加入S2-到检测系统中，这可能会应用于从水中去除有毒的Hg 2+。Elsevier B. V.保留所有权利。
A new tetraphenylethylene derivative based fluorescenct probe (probe2) was synthesized in a simple two-step process for selectively switch on and reversible detection of Hg2+in aqueous solution based on aggregation-induced emission phenomenon. Probe2exhibited weak emission in aqueous solution due to the fast non-radiative decay of the excited singlet state facilitated by the free rotation of four phenyl rotors. While after coordination with Hg2+, the Hg2+-promoted aggregation formation will occur and restrict the intramolecular rotation, which blocks the non-radiative pathways and opens up the emission channel, resulting in the switch on response of probe2toward Hg2+. Probe2exhibited high sensitivity and good selectivity toward Hg2+with a detection limit of 45.4 nM. Moreover, the detection can be reversible by subsequent addition of S2-into the detection system, which may be applied in the removal of toxic Hg2+from water. Elsevier B.V. All rights reserved.