Department of Chemistry, University of Kalyani, Kalyani 741235, India.
Department of Chemistry, University of Kalyani, Kalyani 741235, India.
Methods. 2024 May;225:13-19. doi: 10.1016/j.ymeth.2024.02.009. Epub 2024 Mar 2.
A new molecular structure 1 has been developed on naphthalimide motif. The amine and triazole binding groups have been employed at the 4-position of naphthalimide to explore the sensing behavior of molecule 1. Single crystal x-ray diffraction and other spectroscopic techniques confirm the identity of 1. Compound 1 exhibits high selectivity and sensitivity for Cu ions in CHCN. The binding of Cu shows ∼ 70-fold enhancement in emission at 520 nm. The binding follows 1:1 interaction and the detection limit is determined to be 6.49 × 10 M. The amine-triazole binding site in 1 also corroborates the detection of F through a colour change in CHCN. Initially H-bonding and then deprotonation of amine -NH- in the presence of F are the sequential steps involved in F recognition with a detection limit of 4.13 × 10 M. Compound 1 is also sensible to CN like F ion and they are distinguished by Fe ion. Cu-ensemble of 1 fluorimetrically recognizes F among the tested anions and vice-versa. The collaborative effect of amine and triazole motifs in the binding of both Cu and F/CN has been explained by DFT calculation.
一种新的基于萘酰亚胺结构的分子结构 1 已经被开发出来。在萘酰亚胺的 4-位上引入了胺基和三唑结合基团，以探索分子 1 的传感性能。单晶 X 射线衍射和其他光谱技术证实了 1 的结构。化合物 1 在 CHCN 中对 Cu 离子表现出高选择性和高灵敏度。Cu 的结合在 520nm 处的发射强度增强了 ∼70 倍。结合遵循 1:1 相互作用，检测限确定为 6.49×10 M。1 中的胺-三唑结合位点也证实了通过在 CHCN 中颜色变化检测 F。F 识别涉及的顺序步骤是首先在 F 的存在下通过 H 键合然后去质子化胺 -NH-，检测限为 4.13×10 M。化合物 1 对 CN 也像 F 离子一样敏感，它们可以通过 Fe 离子区分。1 的 Cu 配合物通过荧光法在测试的阴离子中识别 F，反之亦然。DFT 计算解释了胺和三唑基序在结合 Cu 和 F/CN 中的协同作用。
