Design of switchable wettability sensor for paraquat based on clicking calix[4]arene

Org Biomol Chem. 2012 Apr 28;10(16):3185-8. doi: 10.1039/c2ob00018k. Epub 2012 Mar 12.

Abstract

A calix[4]arene acetylene (C4AE)-modified gold surface is successfully constructed in situ via click chemistry. The functionalized surface is used for selective recognition of paraquat by a wettability switch. Impedance measurements showed that the surface also expresses recognition for paraquat with a high sensitivity of 10 pM. The recognition mode, based on host-guest inclusion, is studied by computational calculations and the possible mechanism is analyzed.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetylene / chemical synthesis
  • Acetylene / chemistry
  • Calixarenes / chemical synthesis
  • Calixarenes / chemistry*
  • Click Chemistry
  • Electric Impedance
  • Electrochemical Techniques / methods*
  • Gold / chemistry
  • Herbicides / analysis*
  • Paraquat / analysis*
  • Phenols / chemical synthesis
  • Phenols / chemistry*
  • Sensitivity and Specificity
  • Surface Properties
  • Wettability

Substances

  • Herbicides
  • Phenols
  • calix(4)arene
  • Calixarenes
  • Gold
  • Acetylene
  • Paraquat