期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 242, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2020.118790
关键词
Metal organic framework; 2,4.6-trinitrophenol (TNP); Chromate (CrO42-/Cr2O72-) anions; Fluorescent quenching; Crystal structure
类别
资金
- Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering [2017-K09]
- National Natural Science Foundation of China [21961027, 21902058]
A new luminescence Cd(II)-MOT (1) ([Cd-3(BTC)(2)(TFT)(H2O)(2)]center dot 4H(2)O, TPT tris(4-pyridyl)triazine, H3BTC = 1,3,5-benzenetricarboxylic acid) was successfully synthesized under solvothermal conditions. 1 contains 3D framework which consist of Cd atoms and btc(3-) anions with the large channels along c axis. Then, tpt ligands locate in the channels by utilizing three N atoms to bridge two Cd1 atoms and one Cd2 atom. 1 not only possesses remarkable thermal stability, but also can steadily exist in different organic solvents and various add/base solutions (pH = 3-12). Moreover, 1 can detect 2,4,6-trinitrophenol (TNP) and chromate (CrO42-/Cr2O72-) anions with high selectivity and sensitivity in water via the luminescent quenching. The detection limits of 1 for TNP and CrO42-/Cr2O72- are 6.23 mu M and 2.13 mu M/2.87 mu M. The mechanism of 'TNP luminescence quenching may be attributed to photoinduced electron transfer and resonance energy transfer, and CrO42-/Cr2O72- quenching involves resonance energy transfer and competitive absorption of light. Additionally, 1 has the great anti-interference ability and repeatability for detecting TNP and CrO42-/Cr2O72-, which can display the feasibility of this material as a stable luminescent probe in aqueous system. (C) 2020 Elsevier B.V. All rights reserved.
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