Journal
DALTON TRANSACTIONS
Volume 48, Issue 36, Pages 13607-13613Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt02733e
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Funding
- National Nature Science Foundation of China [21871220, 21531007]
- NSF of Shaanxi province [2019JM-082]
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Tuning the emissive color changes of lanthanide (Ln) complexes is an important and appealing project for promoting the applications of Ln-complexes. A solvothermal reaction of 4-cyano-3-methylbenzoic acid (HL) and Ln(NO3)(3)center dot 6H(2)O affords three isostructural Ln-complexes [Eu(L)(3)(H2O)(2)](n) (1-Ln) (Ln = Eu, Gd and Tb) with one-dimensional chain structures. 1-Eu and 1-Tb show bright red and green emissions with absolute quantum yields of 3.06% and 11.96%, respectively, and the energy transfer was analyzed in detail through combined calculations. Interestingly, a series of heterometallic doped 1-TbxEu1-x coordination polymers were also obtained by mixing different ratios of Eu3+ and Tb3+ ions, which possess continuous luminescent color changes from green to yellow, orange and red. In addition, 1-Eu exhibits high quenching efficiency and low detection limit (similar to 10(-4) M) for the simultaneous sensing of MnO4-, CrO42- and Cr2O72- ions in water.
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