Problems in the IR measuring the acidity of zeolite bridging hydroxyls by low-temperature CO adsorption

Chem Commun (Camb). 2011 Feb 14;47(6):1878-80. doi: 10.1039/c0cc04484a. Epub 2010 Dec 2.

Abstract

Two infrared OH stretching bands are produced after interaction of CO with H-ZSM-5 bridging hydroxyls. These two bands are not due to heterogeneity of the acid sites but arise from Fermi-resonance.