基于配体H₂L的聚合物(HL⁻)_n的合成及其对水中4-NP的传感研究

Synthesis of Polymer (HL⁻)_n Based on Ligand H₂L and Its Sensing Study for 4-NP in Water

摘要: 4-硝基苯酚(4-NP)作为一种重要的硝基芳烃化合物(NAC)，广泛应用于农药生产、炸药合成、木材防腐等领域。该化合物在环境中残留时间长，不易降解，对生态环境和人体健康危害极大，因此建立准确有效地检测目标物的方法尤为重要。本文以吡唑羧酸配体H₂L为原料，通过溶剂热反应得到了聚合物(HL⁻)_n。(HL⁻)_n可作为一个发光传感器用于水介质中4-NP的识别，并且具有高的选择性，最低检测限(LOD)为0.43 μM。此外，还对发光猝灭机理进行了研究。所以，配位聚合物(HL⁻)_n可以作为水中4-NP的发光传感器。

Abstract: 4-Nitrophenol (4-NP), as an important nitro aromatic compound (NAC), is widely used in the production of pesticides, synthesis of explosives, wood preservation, and other fields. This compound has a long residual time in the environment, is not easily degraded, and poses a significant risk to the ecological environment and human health. Therefore, establishing an accurate and effective method for detecting the target substance is particularly important. In this paper, a polymer (HL⁻)_n was obtained through a solvothermal reaction using the pyrazole carboxylic acid ligand H₂L as the raw material. (HL⁻)_n can serve as a luminescent sensor for the identification of 4-NP in aqueous media, with high selectivity, and a minimum detection limit (LOD) of 0.43 μM. In addition, the luminescence quenching mechanism was also studied. Therefore, the coordination polymer (HL⁻)_n can be used as a luminescent sensor for 4-NP in water.