偶氮酚衍生（硫）杂杯[4]芳烃用于阴离子的比色传感：配位诱导的扩展共轭。
Azophenol appended (thia)calix[4]arenes for colorimetric sensing of anions: a complexation induced extended conjugation.
机构信息
Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
出版信息
Talanta. 2010 Apr 15;81(1-2):9-14. doi: 10.1016/j.talanta.2009.11.028. Epub 2009 Nov 13.
Iminoazophenol appended calix[4]arene/thiacalix[4]arene derivatives 1 and 2 of cone and 3 of 1,3-alternate conformation have been synthesized and examined for their chromogenic anion recognition abilities towards different anions like fluoride, chloride, bromide, iodide, acetate, dihydrogenphosphate, nitrate and hydrogensulphate by UV-vis spectroscopy. Receptors 1-3 show an unusual red shift in UV-vis spectra upon binding with these anions, with a colour change visible to naked eye in case of fluoride, acetate and dihydrogenphosphate ions at lower concentration of anions. This red shift in the absorption spectra is accounted by anion complexation induced sigma-extended conjugation.
席夫碱衍生杯[4]芳烃/硫杂杯[4]芳烃衍生物 1 和 2 为锥形结构，3 为 1,3-交替构象，已经被合成出来，并通过紫外可见光谱法研究了它们对不同阴离子（如氟离子、氯离子、溴离子、碘离子、醋酸根离子、磷酸二氢根离子、硝酸根离子和硫酸氢根离子）的显色阴离子识别能力。受体 1-3 与这些阴离子结合后，在紫外可见光谱中表现出异常的红移，在较低浓度的阴离子存在下，对氟离子、醋酸根离子和磷酸二氢根离子，肉眼可见颜色变化。这种吸收光谱的红移归因于阴离子配合诱导的 sigma-扩展共轭。
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