Enhanced quantum yield of nanographenes incorporated in supermicroporous silicas and the co-adsorption effect of water molecules

Hiroto Watanabe, Yasuto Fujimaki, Kosei Hayashi, Hiroaki Imai

Research output: Contribution to journalArticle

Abstract

Nanographene with various molecular sizes was synthesized and incorporated into the size-controlled pores of super-microporous silica (SMPS). It was found that when the pore diameter of the SMPS matched the molecular size of the nanographene, the fluorescence quantum yield was greatly enhanced. Furthermore, co-adsorption of water molecules improved the quantum yield. This improvement is attributed to a suppression of the interaction between the nanographene and silica walls, which lowers the quantum yield. Since nanographene is insoluble in water, it becomes surrounded by water molecules, almost like in aqueous solution. Finally, highly fluorescent solid materials were obtained by incorporating nanographene into SMPS.

Original languageEnglish
Pages (from-to)923-926
Number of pages4
JournalBulletin of the Chemical Society of Japan
Volume92
Issue number5
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Nanographenes
  • Phosphor
  • Porous silica

ASJC Scopus subject areas

  • Chemistry(all)

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