Preparation of periodic mesoporous organosilica with large mesopores using silica colloidal crystals as templates

Naho Muramoto, Tomoaki Sugiyama, Takamichi Matsuno, Hiroaki Wada, Kazuyuki Kuroda*, Atsushi Shimojima

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Organosiloxane-based mesoporous materials with periodically ordered pores (periodic mesoporous organosilica, PMO) have many applications due to their various organic functions, high surface areas, and large pore volumes. Conventional methods using surfactant templates (soft templates) are limited in terms of the diversity of organosilane precursors and precise control over the pore size in a relatively large mesopore region (10-50 nm). This paper demonstrates the preparation of PMOs with precisely controlled pore sizes (>10 nm in diameter) and various organosiloxane frameworks, using colloidal crystals of monodisperse silica nanospheres as a template. An inverse opal structure with interconnected spherical mesopores was obtained through polycondensation of hydrolyzed organoalkoxysilanes [(EtO)3Si-R-Si(OEt)3, R = C2H4, CHCH, and C6H4; PhSi(OEt)3], within the voids of silica colloidal crystals, followed by the preferential dissolution of silica under well-controlled basic conditions. The pore size varied depending on the size of the silica nanospheres. The versatility of this method will allow for the wide tuning of the physical and chemical properties of organosiloxane-based mesoporous materials.

Original languageEnglish
Pages (from-to)21155-21164
Number of pages10
Issue number41
Publication statusPublished - 2020 Nov 7

ASJC Scopus subject areas

  • General Materials Science


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