Photofunctional Silica Gel Beads as Environmental Conscious Materials

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  • Yasuda Masahide
    Department of Applied Chemistry, Faculty of Engineering, University of Miyazaki
  • Matsumoto Jin
    Department of Applied Chemistry, Faculty of Engineering, University of Miyazaki
  • Shiragami Tsutomu
    Department of Applied Chemistry, Faculty of Engineering, University of Miyazaki

Bibliographic Information

Other Title
  • 環境調和材料としての光機能性シリカゲルビーズ
  • カンキョウ チョウワ ザイリョウ ト シテ ノ ヒカリ キノウセイ シリカゲル ビーズ
  • ChemInform Abstract: Photofunctional Silica Gel Beads as Environmental Conscious Materials
Published
2010
DOI
  • 10.5059/yukigoseikyokaishi.68.238
  • 10.1002/chin.201033277
Publisher
The Society of Synthetic Organic Chemistry, Japan

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Description

Photofunctional silica gel beads have been developed as environmental conscious materials. The hydroxybenzophenone (Hbp) chromophore–bonded silica gel (SiO2) beads (1) were developed as UV–absorbents. 4,5–Dimethoxy–2–nitrobenzyloxycarbonyl (Nbz) chromophore–bonded SiO2 (2) was prepared in order to control the amounts and sites of functional group by a use of Nbz as a photolabile protecting group. Diacetoxyantimony tetraphenylporphyrinato chromophore (Sb(OAc)2tpp)–bonded SiO2 (3a) was packed in micro–channel reactor. The photoreaction of 3a with Et2NH induced the demetallation to give free base tetraphenylporphyrin chromophore (H2tpp)–bonded SiO2 (3b). The color change of the H2tpp–H–adsorbed SiO2 (4) under dry and humidity conditions was applied to a new type of humidity indicator without CoCl2. The Sb(OH)2tpp–H–adsorbed SiO2 (5) was used as visible light driven photocatalysts in dechlorination of 4–chlororophenol, epoxidation of cyclohexene, and bactericidal reaction of E. coli. Also dimethoxophosphorus tetraphenylporphyrine (P(OMe)2tpp–H)–adsorbed SiO2 (6b) was practically used to sterilization Legionella species naturally occurring in fountain.

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