Synthesis of Upper-Rim Allyl- and <i>p-</i>Methoxyphenylazocalix[4]arenes and Their Efficiencies in Chromogenic Sensing of Hg<sup>2+</sup> Ion
作者:I-Ting Ho、Gene-Hsiang Lee、Wen-Sheng Chung
DOI:10.1021/jo062280s
日期:2007.3.1
A series of upper-rim p-allyl and p-methoxyphenylazocalix[4]arenes (6, 8, 9a,b, and 10a,b) were synthesized and shown to exhibit substantial color changes upon complexation with Hg2+ ion. Both the upper-rim p-allyl- and p-methoxyphenylazo groups on calix[4]arenes are proven to be key components in the recognition of Hg2+ ion. Job's plots revealed 1:1 binding stoichiometry for all these p-allyl- and
Synthesis of Upper-Rim Sulfanylpropyl- and <i>p-</i>Methoxyphenylazo-Substituted Calix[4]arenes as Chromogenic Sensors for Hg<sup>2+</sup> and Ag<sup>+</sup> Ions
A series of calix[4]arenes with upper-rim sulfanylpropyl and p-methoxyphenylazo groups (compounds 8–10) were synthesized and found to be effective chromogenic sensors for selectively detecting Hg2+, Hg+, and Ag+ ions among 18 screened metal perchlorates. In comparison to previously reported diallyl- and dithioacetoxypropyl-substituted calix[4]arenes (5, 6, 14, 15, and 16) and the newly synthesized