Original Paper

Topics in Catalysis

, Volume 53, Issue 3, pp 187-191

First online:

Urea and Thiourea-Functionalized Mesoporous Silica Nanoparticle Catalysts with Enhanced Catalytic Activity for Diels–Alder Reaction

  • Hung-Ting ChenAffiliated withDepartment of Chemistry, Iowa State UniversityU.S. Department of Energy Ames Laboratory, Iowa State University
  • , Brian G. TrewynAffiliated withDepartment of Chemistry, Iowa State University
  • , Jerzy W. WienchAffiliated withU.S. Department of Energy Ames Laboratory, Iowa State University
  • , Marek PruskiAffiliated withDepartment of Chemistry, Iowa State UniversityU.S. Department of Energy Ames Laboratory, Iowa State University
  • , Victor S.-Y. LinAffiliated withDepartment of Chemistry, Iowa State UniversityU.S. Department of Energy Ames Laboratory, Iowa State University Email author 

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Abstract

A series of urea- and thiourea-functionalized mesoporous silica nanoparticles (MSN) was synthesized. These materials exhibited a superior catalytic reactivity for Diels–Alder reaction than their homogeneous analogues. The reactivity enhancement was attributed to the site isolation effect induced by the heterogenization of individual catalytic group. The surface hydrogen bonding between the organic catalysts and silanols also improved the catalytic reactivity.

Keywords

Thiourea Mesoporous silica nanoparticle Heterogeneous catalysis Surface hydrogen bonding Diels–Alder reaction