Chromogenic silica nanoparticles for the colorimetric sensing of long-chain carboxylates

Chem Commun (Camb). 2008 Apr 14:(14):1668-70. doi: 10.1039/b718690h. Epub 2008 Feb 5.

Abstract

Silica nanoparticles functionalized with chromogenic spirobenzopyran and thiourea subunits show selective colour changes in the presence of certain long-chain carboxylates.