Novel bis(phenylselenoalkoxy)calix[4]arene molecular tweezer receptors as sensors for ion-selective electrodes
作者:Xianshun Zeng、Xuebing Leng、Langxing Chen、Hao Sun、Fengbo Xu、Qingshan Li、Xiwen He、Zheng-Zhi Zhang
DOI:10.1039/b109238c
日期:2002.3.25
Four tweezer-like 25,27-dihydroxy-26,28-bis(phenylselenoalkoxy)-5,11,17,23-tetra-tert-butylcalix[4]arenes 5–8 were synthesized for the evaluation of their ion-selectivity in ion-selective electrodes (ISEs). For investigation of the influences of the coordinate atoms on the ion-selectivity, 25,27-dihydroxy-26,28-bis(alkylthiaalkoxy)-5,11,17,23-tetra-tert-butylcalix[4]arenes 9–11 were also prepared and characterized. On the other hand, 1,3-bis(phenylseleno)propane 12 was synthesized for comparison of the influences of coordinate patterns of different ionophores on the ion-selectivity of ISEs. ISEs based on 5–12 as neutral ionophores were prepared, and their selectivity coefficients for Ag+
(log KpotAg,M) were investigated against alkali metal, alkaline-earth metal, lead, and ammonium ions and some transition metal ions using the fixed interference method (FIM). These ISEs showed excellent Ag+ selectivity over most of the interfering cations examined, except for Hg2+, which had relatively smaller interference (log KpotAg,Hg
≤
−1.6).
合成了四种类似镊子的25,27-二羟基-26,28-双(苯基硒烯氧基)-5,11,17,23-四-tert-丁基环四烯 5–8,用于评估其在离子选择性电极(ISEs)中的离子选择性。为了研究配位原子对离子选择性的影响,还合成并表征了25,27-二羟基-26,28-双(烷基硫醇烯氧基)-5,11,17,23-四-tert-丁基环四烯 9–11。另一方面,合成了1,3-双(苯基硒烯)丙烷 12,以比较不同离子载体的配位模式对ISEs离子选择性的影响。以5–12为中性离子载体的ISEs被制备,并使用固定干扰法(FIM)研究了其对Ag+的选择性系数(log KpotAg,M),与碱金属、碱土金属、铅、铵离子以及一些过渡金属离子进行比较。这些ISEs在大多数干扰阳离子中表现出优异的Ag+选择性,除了Hg2+,其干扰相对较小(log KpotAg,Hg ≤ −1.6)。