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Three 3D lanthanide anionic metal-organic frameworks K (5) Ln (5) (IDC) (4) (ox) (4) (n) x (20H (2) O) (n) with 1D channels were synthesized under hydrothermal conditions Ln = Gd (1), Tb (2), and Dy (3). The K (+) ions within the 1D channel are easily exchanged with various cations. The emission intensities of Tb (III) in 2 increased significantly upon the addition of Ca (2+) ions, while the introduction of other metal ions caused the intensities to be either unchanged or weakened.
Lu et al. (Wed,) studied this question.
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