4.4 Article

Synthesis and evaluation of a novel pyrenyl-appended triazole-based thiacalix[4]arene as a fluorescent sensor for Ag+ ion

Journal

TETRAHEDRON
Volume 67, Issue 18, Pages 3248-3253

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2011.03.008

Keywords

Thiacalix[4]arene; Metal ion recognition; Pyrenyl-appended triazole; Fluorescent sensor; Silver cation

Funding

  1. OTEC at Saga University
  2. Guizhou University
  3. EPSRC
  4. Engineering and Physical Sciences Research Council [EP/H031855/1] Funding Source: researchfish
  5. EPSRC [EP/H031855/1] Funding Source: UKRI

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New fluorescent chemosensors 1,3-alternate-1 and 2 with pyrenyl-appended triazole-based on thiacalix[4]arene were synthesized. The fluorescence spectra changes suggested that chemosensors 1 and 2 are highly selective for Ag+ over other metal ions by enhancing the monomer emission of pyrene in neutral solution. However, other heavy metal ions, such as Cu2+, and Hg2+ quench both the monomer and excimer emission of pyrene acutely. The H-1 NMR results indicated that Ag+ can be selectively recognized by the triazole moieties on the receptors 1 and 2 together with the ionophoricity cavity formed by the two inverted benzene rings and sulfur atoms of the thiacalix[4]arene. (C) 2011 Elsevier Ltd. All rights reserved.

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