A highly selective, and effective poly(azomethine-urethane)-based chemosensor (HIMA) was prepared, and it used as a fluorescent sensor for the detection of Cr³⁺ cations in different solutions. The HIMA was prepared in two-step reactions by using hexamethylene diisocyanate, 2,4-dihydroxy benzaldehyde, and 2-aminophenol. The sensitivity and selectivity of the fluorescent probe were tested in the presence of different metal ions. The obtained findings indicated that the chemosensor exhibited a quenching effect against the only Cr³⁺ ion. The limit of detection (LOD) and limit of quantitation (LOQ) of the chemosensor HIMA were calculated as 7.98 × 10^–7 M, and 2.42 × 10^–6 M, respectively. In addition, the binding constant (Ka) of the chemosensor was calculated as 5.31 × 10⁵ M⁻¹.

制备了一种高选择性、高效的基于聚（偶氮甲亚胺-氨基甲酸乙酯）的化学传感器（HIMA），并将其用作检测不同溶液中Cr ³⁺阳离子的荧光传感器。HIMA 是通过使用六亚甲基二异氰酸酯、2,4-二羟基苯甲醛和 2-氨基苯酚通过两步反应制备的。在不同金属离子存在下测试荧光探针的灵敏度和选择性。获得的发现表明化学传感器对唯一的Cr ³⁺离子表现出猝灭作用。化学传感器 HIMA 的检测限 (LOD) 和定量限 (LOQ) 经计算为 7.98 × 10 ^–7  M 和 2.42 × 10 ^–6 M，分别。此外，化学传感器的结合常数 (Ka) 计算为 5.31 × 10 ⁵  M ^-1。