The syntheses and Ag +-selective electrode properties of benzothiazolylthiaalkoxy functionalized calix[4]arenes: an investigation of the structure–selectivity relationship in the ionophore-based ISEs

• Published in: Tetrahedron Vol. 58; no. 13; pp. 2647 - 2658
• Main Authors: Zeng, Xianshun, Weng, Linhong, Chen, Langxing, Xu, Fengbo, Li, Qingshan, Leng, Xuebing, He, Xiwen, Zhang, Zheng-Zhi
• Format: Journal Article
• Language: English
• Published: OXFORD Elsevier Ltd 25.03.2002; Elsevier
• Subjects: calixarenes; Chemistry; Chemistry, Organic; crystal structure; electrodes; ionophores; Physical Sciences; Science & Technology; silver; crystal structure; calixarenes; electrodes; silver; ionophores; SODIUM; RECOGNITION; MEMBRANE; SENSORS; FIELD-EFFECT TRANSISTORS; BULK OPTODES; CESIUM-ION; DERIVATIVES; NEUTRAL CARRIER
• ISSN: 0040-4020; 1464-5416
• DOI: 10.1016/S0040-4020(02)00124-2

A series of benzothiazolylthiaalkoxy functionalized calix[4]arenes with different tether length between the benzothiazolyl and calix[4]aryl groups have been synthesized and characterized for comparison between the coordinate adjustment behaviors of the two benzothiazolyl groups in the generation of ion-selective electrodes (ISEs). ISEs based on these calix[4]arenes showed excellent Ag + selectivities, log K Ag,M pot≤−4.0, against most of the interfering cations examined, except for Hg 2+ having a very weak interference (log K Ag,M pot≤−2.5). Their plausible recognition mechanism as well as their structure–selectivity relationships are also discussed. Graphic