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A luminescent Cd(II)-metal organic frameworks combined of TPT and H3BTC detecting 2,4,6-trinitrophenol and chromate anions in aqueous.
- Source :
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Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy . Dec2020, Vol. 242, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
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Abstract
- A new luminescence Cd(II)-MOF (1) ([Cd 3 (BTC) 2 (TPT)(H 2 O) 2 ]·4H 2 O, TPT = tris(4-pyridyl)triazine, H 3 BTC = 1,3,5-benzenetricarboxylic acid) was successfully synthesized under solvothermal conditions. 1 contains 3D framework which consist of Cd atoms and btc3− 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 acid/base solutions (pH = 3–12). Moreover, 1 can detect 2,4,6-trinitrophenol (TNP) and chromate (CrO 4 2−/Cr 2 O 7 2−) anions with high selectivity and sensitivity in water via the luminescent quenching. The detection limits of 1 for TNP and CrO 4 2−/Cr 2 O 7 2− are 6.23 μM and 2.13 μM/2.87 μM. The mechanism of TNP luminescence quenching may be attributed to photoinduced electron transfer and resonance energy transfer, and CrO 4 2−/Cr 2 O 7 2− quenching involves resonance energy transfer and competitive absorption of light. Additionally, 1 has the great anti-interference ability and repeatability for detecting TNP and CrO 4 2−/Cr 2 O 7 2−, which can display the feasibility of this material as a stable luminescent probe in aqueous system. Unlabelled Image • A new Cd(II)-MOF (1) was synthesized by solvothermal method based on TPT and H 3 BTC. • 1 possesses remarkable thermal and acid/base stability. • 1 can detect TNP and CrO 4 2−/Cr 2 O 7 2− with high selectivity and sensitivity in water. • 1 exhibits the great anti-interference ability and repeatability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13861425
- Volume :
- 242
- Database :
- Academic Search Index
- Journal :
- Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 145680921
- Full Text :
- https://doi.org/10.1016/j.saa.2020.118790