Abstract Feasibly synthesized novel rhodamine based chemosensor (RS) has been described for the detection of paramagnetic and biologically important Cu2+ and Fe3+ ions. Among all the transition metal ions, this chemosensor was able to precisely spot out the Cu2+/Fe3+ ion couple by its spirolactam cleavage, consequently enhanceing their absorbances at 521 and 529 nm for Cu2+ and Fe3+ ions respectively even at low concentrations [263 pM (Cu2+) and 2 nM (Fe3+)], which is prominently lower than the WHO and the United States Environmental Protection Agency (USEPA) strategies. This metal pair (Cu2+/Fe3+) has more tendencies to cleave the lactam ring even in the presence of higher concentrations of other relevant metal ions. Such remarkable behaviour of RS has been motivated us to apply zebrafish bio-imaging and molecular logic circuits.

中文翻译：

---

用于体内生物成像的荧光传感器、斑马鱼胚胎中 Fe3+ 离子的精确跟踪以及皮摩尔级 Cu2+ 离子的视觉测量

摘要 已经描述了可行合成的新型罗丹明化学传感器 (RS)，用于检测顺磁性和生物学上重要的 Cu2+ 和 Fe3+ 离子。在所有过渡金属离子中，该化学传感器能够通过其螺内酰胺裂解精确发现 Cu2+/Fe3+ 离子对，因此即使在低浓度 [263 pM (Cu2+ ) 和 2 nM (Fe3+)]，明显低于 WHO 和美国环境保护署 (USEPA) 的策略。即使在其他相关金属离子浓度较高的情况下，这种金属对 (Cu2+/Fe3+) 也更倾向于裂解内酰胺环。RS 的这种非凡行为促使我们应用斑马鱼生物成像和分子逻辑电路。