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A terbium(III)-complex-based on-off fluorescent chemosensor for phosphate anions in aqueous solution and its application in molecular logic gates

Authors :
Yan-Ling Yang
Pengzhi Wang
Ya-Wen Wang
Shun-Bang Liu
Yu Peng
Ai-Jiang Zhang
Source :
ACS applied materialsinterfaces. 7(7)
Publication Year :
2015

Abstract

A new Tb(III) complex based on a tripodal carboxylate ligand has been synthesized for the selective fluorescent recognition of phosphate anions, including inorganic phosphates and nucleoside phosphates (e.g., ATP), in Tris buffer solution. The resulting L · Tb complex shows the characteristic emission bands centered at about 495 and 550 nm from the Tb(III)-centered (5)D4 excited state to (7)FJ transitions with J = 6 and 5, where the chelating ligand acts only as an "antenna". Upon the addition of phosphate anions to the aqueous solution of Tb(III) complex, significant "on-off" fluorescence changes were observed, which were attributed to the inhibition of the "antenna" effect between the ligand and Tb(III) after the incorporation of phosphate anions. Furthermore, this unique Tb(III) complex has been successfully utilized to detect phosphate anions with filter papers and hydrogels. Notably, the Tb(III) complex also can be used for the construction of molecular logic gates with TRANSFER and INHIBIT logic functions by using the above fluorescence changes.

Details

ISSN :
19448252
Volume :
7
Issue :
7
Database :
OpenAIRE
Journal :
ACS applied materialsinterfaces
Accession number :
edsair.doi.dedup.....56090f9c6719ccdb1f604ac1bd8e53fa