In this work, we demonstrate the use of simple, low-cost, benign, and portable solid-state optical sensor material constructed through direct immobilization of chromoionophoric probe onto a porous polymer monolithic template. The fabricated polymer template depicts superior sensing properties such as a high surface area with uniform porous networks, which is suitable for the homogenous dispersion of chromoionophoric probe onto the voluminous cavity of the polymer template. The surface morphological features and the structural analysis of the polymer template are characterized using p-XRD, TEM, SEM, SAED, EDAX, XPS, and N₂ isotherm analysis. The impregnation of the probe, 2-(4-(dimethylamino)benzylidene)-N-phenylhydrazine-1-carbothioamide (DABNC) onto the pore surface of the polymer monolith renders superior sensing performance in capturing ultra-trace concentration of Cu²⁺ ions, which is inferred from a series of visual color transitions (dull white to sap green). The selective naked-eye color recognition is associated with the formation of stable charge-transfer complexes with the chelating sites of the probe molecules with Cu²⁺ ions. To ensure the effectiveness of ion-sensing, analytical parameters such as solution pH, probe concentration, sensor dosage, temperature, response kinetics, and ion-selectivity amidst matrix ions are systematically optimized. The range of linear response signal is found to be 0–100 μg/L, with a limit of detection and quantification values of 0.15 and 0.56 μg/L, respectively. The used sensor material can be regenerated to its original state, without any loss of its sensing efficacy, up to six regenerative cycles. The practical applicability of the developed sensor is tested using various real water samples, and the analytical data obtained are reliable and reproducible (RSD ≤1.12%, n = 3).

在这项工作中，我们展示了通过将发色离子探针直接固定在多孔聚合物整体模板上而构建的简单、低成本、良性和便携式固态光学传感器材料的使用。制备的聚合物模板具有优异的传感特性，例如具有均匀多孔网络的高表面积，适用于发色离子探针在聚合物模板的大腔上的均匀分散。聚合物模板的表面形态特征和结构分析使用 p-XRD、TEM、SEM、SAED、EDAX、XPS 和 N ₂等温线分析进行表征。探针的浸渍，2-(4-(二甲氨基)亚苄基) -N-苯基肼-1-碳硫代酰胺（DABNC）在聚合物整体的孔表面上呈现出优异的传感性能，可捕获超痕量Cu ²⁺离子，这是从一系列视觉颜色转变（暗白色到汁绿色）推断出来的. 选择性肉眼颜色识别与探针分子与 Cu ²⁺的螯合位点形成稳定的电荷转移复合物有关离子。为确保离子传感的有效性，系统优化了分析参数，如溶液 pH 值、探针浓度、传感器剂量、温度、响应动力学和基质离子中的离子选择性。发现线性响应信号的范围为 0–100 μg/L，检测限和定量值分别为 0.15 和 0.56 μg/L。使用过的传感器材料可以再生到其原始状态，而不会损失其传感功效，最多可再生六个循环。使用各种真实水样测试了所开发传感器的实际适用性，获得的分析数据可靠且重现性好（RSD ≤1.12%，n = 3）。