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Selective Metal‐Ion Detection and Activatable Photosensitization Properties of a Tetraphenylethylene‐Based Salicylideneimine
Author(s) -
Marandi Parvati,
Kumar P. P. Praveen,
Venugopalan Paloth,
Neelakandan Prakash P.
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901035
Subject(s) - tetraphenylethylene , chromophore , metal ions in aqueous solution , chemistry , fluorescence , photochemistry , singlet oxygen , acetonitrile , metal , molecule , schiff base , aqueous solution , ion , aggregation induced emission , polymer chemistry , organic chemistry , oxygen , physics , quantum mechanics
Development of chemosensors for metal ions is an active area of research. Fluorescent chemosensors capable of detecting multiple metal ions are valuable because of their potential utility in diagnostics and environmental science. We have synthesized a Schiff‐base chemosensor based on the tetraphenylethylene chromophore. It was observed that the chemosensor interacts with Cu(II) and Zn(II) in acetonitrile with high association constants of 2.33 × 10 21 and 1.33 × 10 21 M −4 , respectively. Moreover, the interaction of these metal ions with the chemosensor resulted in visual colour and fluorescence changes. Nanoaggregates of this molecule, on the other hand, were observed to be selective towards Cu(II) in the aqueous medium. It is also noteworthy that the binding of Cu(II) activates photosensitization property of this molecule and generates singlet oxygen efficiently.