12-Tungstophosphoric acid/zirconia—a highly active stable solid acid—comparison with a tungstated zirconia catalystElectronic supplementary information (ESI) available: W and P analysis in the reaction mixtures. Fig. S1: 31P MAS NMR. Fig. S2: FT-IR pyridine adsorption spectra. Fig. S3: conversion and acidity vs. TPA loading. See http://www.rsc.org/suppdata/cc/b2/b200722c/

Abstract

A highly active and stable zirconia supported 12-tungstophosphoric acid catalyst is found to be 2-3 times more active in benzylation and acylation reactions than a tungstated zirconia catalyst.