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Distinctly Different Chemical Functionalities on the Internal and the External Surfaces of Silica Nanotubes, and Their Applications as Multi‐Chemosensors
Author(s) -
Seo Sungmin,
Lee Ji Ha,
Cho Youngje,
Kim JinGyu,
Kim Changyeon,
Jung Jong Hwa
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201100011
Subject(s) - azobenzene , nanotechnology , materials science , fluorescence , computer science , chemical engineering , chemistry , organic chemistry , optics , physics , molecule , engineering
Inside and out : The external and internal surface of silica nanotubes (SNTs) can be independently modified by a sol–gel grafting reaction. The azobenzene‐based ligands on the external surface recognize Hg 2+ through a color change, whereas the BODIPY‐based ligands attached to the internal surface recognize Pb 2+ through fluorescence enhancement. Thus, the modified SNTs selectively recognize both Hg 2+ and Pb 2+ (see figure).