Jump to main content
Jump to site search

Issue 40, 2018
Previous Article Next Article

Anion identification using silsesquioxane cages

Author affiliations

Abstract

Anthracene-conjugated octameric silsesquioxane (AnSQ) cages, prepared via Heck coupling between octavinylsilsesquioxane (OVS) and 9-bromoanthracene, thermodynamically display intramolecular excimer emissions. More importantly, these hosts are sensitive to each anionic guest, thereby resulting in change of anthracene excimer formation, displaying the solvent-dependent fluorescence and allowing us to distinguish up to four ions such as F, OH, CN and PO43− by fluorescence spectroscopy. Depending on the solvent polarity, for example, both F and CN quenched the fluorescence emission intensity in THF, but only F could enhance the fluorescence in all other solvents. The presence of PO43− results in fluorescence enhancements in high polarity solvents such as DMSO, DMF, and acetone, while OH induces enhancements only in low polarity solvents (e.g. DCM and toluene). A picture of the anion recognizing ability of AnSQ was obtained through principal component analysis (PCA) with NMR and FTIR confirming the presence of host–guest interactions. Computational modeling studies demonstrate the conformation of host–guest complexation and also the change of excimer formation. Detection of F, CN and OH by AnSQ hosts in THF is noticeable with the naked eye, as indicated by strong color changes arising from charge transfer complex formation upon anion addition.

Graphical abstract: Anion identification using silsesquioxane cages

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Jul 2018, accepted on 13 Sep 2018 and first published on 25 Sep 2018


Article type: Edge Article
DOI: 10.1039/C8SC02959H
Citation: Chem. Sci., 2018,9, 7753-7765
  • Open access: Creative Commons BY license
  •   Request permissions

    Anion identification using silsesquioxane cages

    S. Chanmungkalakul, V. Ervithayasuporn, P. Boonkitti, A. Phuekphong, N. Prigyai, S. Kladsomboon and S. Kiatkamjornwong, Chem. Sci., 2018, 9, 7753
    DOI: 10.1039/C8SC02959H

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements