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首页> 外文期刊>Electroanalysis >Use of tin (IV) porhyrins as Ionophores for the construction of phthalate-selective electrodes: Influence of the structure and membrane composition on their response properties
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Use of tin (IV) porhyrins as Ionophores for the construction of phthalate-selective electrodes: Influence of the structure and membrane composition on their response properties

机译：卟啉锡（IV）作为离子载体用于构建邻苯二甲酸酯选择性电极：结构和膜组成对其响应特性的影响

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Tin(IV) porphyrins derivatives were used as ionophores for phthalate selective electrodes preparation. The influence of ionophore structure and membrane composition (amount of incorporated ionic sites) on the electrode response, selectivity and long-term stability were studied. Poly(vinyl chloride) polymeric membranes plasticized with o-NPOE (o-nitrophenyloctylether) and containing Sn(IV)-tetraphenylporphyrin (TPP) dichloride (Sn(IV)[TPP]Cl-2) or Sn(IV)-octaethylporphyrin (OEP) dichloride (Sn(IV)[OEP]Cl2), and in some cases incorporating lipophilic cationic (tetraocthylammonium bromide - TOABr) and anionic (sodium tetraphenylborate - NaTPB and potassium tetrakis[3,5-bis(trifluoromethyl) phenyl]borate-KTFPB) additives, were prepared and their potentiometric characteristics compared. Both ionophores are shown to operate via a neutral mechanism, and the addition of 10 mol % of lipophilic quaternary ammonium salt derivative to the membrane is required to achieve optimal electrode performance. The potentiometric units prepared, with Sn(IV)[TPP]Cl-2 (Type A) or Sn(IV)[OEP]Cl-2 (Type B) without additives, presented a slope of - 52.8 mV dec(-1) and - 58.8 mV dec(-1) and LLLR of 9.9 x 10(-5) mol L-1 and 9.9 x 10(-6) mol L-1, respectively. The units prepared using the same metalloporphyrins and incorporating 10% mol TOABr presented a slope of - 55.0 mV dec(-1) and - 57.8 mV dec(-1) and LLLR of 5.0 x 10(-7) mol L-1 and 3.0 x 10(-7) mol L-1. Their analytical usefulness was assessed by potentiometric determinations of phthalate in water and industrial products providing results that presented recoveries of about 100%.
机译：锡（IV）卟啉衍生物用作邻苯二甲酸酯选择性电极制备的离子载体。研究了离子载体的结构和膜组成（结合的离子位点的数量）对电极响应，选择性和长期稳定性的影响。聚（氯乙烯）聚合物膜，用邻-NPOE（邻-硝基苯基辛基醚）塑化，并包含二氯化锡（IV）-四苯基卟啉（TPP）（Sn（IV）[TPP] Cl-2）或锡（IV）-八乙基卟啉（OEP ）（Sn（IV）[OEP] Cl2），在某些情况下还掺入了亲脂性阳离子（溴化四丁基溴化铵-TOABr）和阴离子（四苯基硼酸钠-NaTPB和四[3,5-双（三氟甲基）苯基]硼酸钾-KTFPB）钾盐）添加剂，并对其电位特性进行了比较。两种离子载体均显示出通过中性机理运行，并且需要向膜中添加10 mol％的亲脂性季铵盐衍生物以实现最佳的电极性能。不含添加剂的Sn（IV）[TPP] Cl-2（A型）或Sn（IV）[OEP] Cl-2（B型）制备的电位计的斜率为-52.8 mV dec（-1） -58.8 mV dec（-1）和LLLR分别为9.9 x 10（-5）mol L-1和9.9 x 10（-6）mol L-1。使用相同的金属卟啉并结合10％mol TOABr制备的单元的斜率-55.0 mV dec（-1）和-57.8 mV dec（-1），LLLR为5.0 x 10（-7）mol L-1和3.0 x 10（-7）mol L-1。通过电位滴定法测定水和工业产品中邻苯二甲酸酯的含量，可评估其分析用途，可提供约100％的回收率。

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