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首页> 外文期刊>European Chemical Bulletin >Selective sensors for potentiometric assessment of iodide based on anion recognition through copper (II) [dipeptide derivative] complex
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Selective sensors for potentiometric assessment of iodide based on anion recognition through copper (II) [dipeptide derivative] complex

机译：通过铜（II）[二肽衍生物]络合物的阴离子识别，用于碘量电位评估的选择性传感器

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摘要

New selective sensors based on potentiometric transduction for iodide assessment were described. The sensors based on the use of a newly synthesized copper (II) [N, N- bis-(1carboxy-2-(p,hydroxy benzyl))–2,6-(diamino carbonyl)-pyridine] complex (CuL) as neutral ionophore in plasticized poly(vinyl chloride) (PVC) membranes. The influence of lipophilic cationic and anionic additives on the response properties of the sensors was evaluated. The fabricated sensors exhibited enhanced response towards iodide ions over the concentration range 6.3×10 -6 to1.0 ×10 -2 mol L -1 with a detection limit 0.33μg mL ? 1 and a slope of -63.6±0.2 mV per decade. These sensors showed a fast and stable response, good reproducibility, and long-term stability. The sensors showed a stable potential over a wide pH range (4.5–9) and exhibited high selectivity for I ? ion in the presence of many common anions. The sensors were applied for direct potentiometric measurements of iodide ions over the concentration range 0.8–1270 μg mL ? 1 and also for the titration of some metal ions (e.g. Ag + , Hg 2 + ) and MnO 4 - through sequential monitoring. The sequential binding of these ions with I ? ensured share stepwise titration curves with consecutive end point breaks at the equivalent points.
机译：描述了基于电位转导的新型选择性传感器，用于碘化物评估。该传感器基于使用新合成的铜（II）[N，N-双-（1羧基-2-（对羟基苄基））-2,6-（二氨基羰基）-吡啶]络合物（CuL）增塑的聚氯乙烯（PVC）膜中的中性离子载体。评估了亲脂性阳离子和阴离子添加剂对传感器响应特性的影响。所制造的传感器在6.3×10 -6至1.0×10 -2 mol L -1的浓度范围内，对碘离子的响应增强，检出限为0.33μgmL？ 1和每十年-63.6±0.2 mV的斜率。这些传感器显示出快速稳定的响应，良好的可重复性和长期稳定性。传感器在较宽的pH范围（4.5–9）范围内显示出稳定的电位，并且对I许多常见阴离子存在下的离子。传感器用于浓度范围为0.8-1270μgmL？的碘离子的直接电位测量。通过顺序监控，还可以用于滴定一些金属离子（例如Ag +，Hg 2 +）和MnO 4-。这些离子与I？的顺序结合。确保在等效点具有连续的终点折断的分步滴定曲线。

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