期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 7, 页码 4415-4422出版社
AMER CHEMICAL SOC
DOI: 10.1021/am5089346
关键词
Tb(III) complex; phosphate anions; fluorescence; chemosensor; molecular logic gate
资金
- National Natural Science Foundation of China [21172096, J1103307]
- Fundamental Research Funds for the Central Universities [lzujbky-2014-59, lzujbky-2014-66]
- Ministry of Education
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 (LTb)-Tb-. complex shows the characteristic emission bands centered at about 495 and 550 nm from the Tb(III)-centered D-5(4) excited state to F-7(J) 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.
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