Janakipriya Subramaniyan, Divya Dhakshinamurthy, Mala Ramanjaneyulu, Nandhagopal Manivannan, Thennarasu Sathiah
Organic and Bioorganic Chemistry Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India.
Organic and Bioorganic Chemistry Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India; Department of Chemistry, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Avadi, Chennai 600062, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Jan 15;325:125085. doi: 10.1016/j.saa.2024.125085. Epub 2024 Sep 5.
A new 1,8-naphthalimide derivative (probe 1) adopts V-shaped structure, emits fluorescence and displays the Mie effect and aggregation-induced emission (AIE). Selective interactions of thiophilic Ag and Hg ions (10 µM) with 1 (10 µM) resulted in AIEs at 499 and 521 nm, respectively. Both Ag and Hg induce the formation of 1:2 complexes with 1, leading to the formation of AIE active aggregates with an average size of 423 and 198 nm, respectively. The formation of crystalline needles with Ag and spherical aggregates with Hg results in wavelength specific AIE that permits the naked-eye and fluorometric detection of Ag and Hg ions. Probe 1 shows excellent selectivity toward Ag and Hg among various metal ions, therefore, 1 is suitable for the selective and quantitative detection of Ag and Hg ions. Job plots are used for the determination of the stoichiometry of the complexes formed. It is evident from the fluorescence images of probe 1 in Rhizoctonia oryzae mycelia cells that they can be employed as potential candidates for in-vitro bioimaging.
一种新型的1,8 - 萘二甲酰亚胺衍生物（探针1）具有V形结构，能发出荧光，并表现出米氏效应和聚集诱导发光（AIE）。亲硫的银离子和汞离子（10 μM）与1（10 μM）的选择性相互作用分别在499和521 nm处产生聚集诱导发光。银离子和汞离子均与1形成1:2的配合物，分别导致形成平均尺寸为423和198 nm的具有聚集诱导发光活性的聚集体。与银离子形成的结晶针状物和与汞离子形成的球形聚集体导致了波长特异性的聚集诱导发光，从而实现了对银离子和汞离子的肉眼和荧光检测。探针1在各种金属离子中对银离子和汞离子表现出优异的选择性，因此，1适用于银离子和汞离子的选择性定量检测。采用Job曲线法测定所形成配合物的化学计量比。从探针1在稻瘟病菌丝体细胞中的荧光图像可以明显看出，它们可作为体外生物成像的潜在候选物。
