Reasonably designing highly pH-stable lanthanide metal−organic frameworks (Ln-MOFs) is of great importance for multifunctional applications. Herein, three isostructural Ln-MOFs, namely, {[Ln(tcmb)(H 2 O) 2 ]•2H 2 O} n (1-Ln, where Ln = Eu, Tb, Gd), have been synthesized and characterized. Experiments results showed that 1-Tb displayed high thermal, pH, and luminescence stability, which provided the possibility for its practical application. Because of the excellent luminescence performances of Ln-MOFs, the luminescent sensing and photocatalytic properties were investigated. 1-Tb exhibits high sensitivity, selectivity for sensing Fe 3+ , CrO 4 2− /Cr 2 O 7 2− ions in the presence of other competition ions. In addition, 1-Gd demonstrates the high photocatalytic activity for degrading tetracycline (TC) under visible light, with the degradation efficiency achieving 82% approximately. To prepare multicolor luminescence materials, by adjusting the relative proportion of Eu 3+ and Tb 3+ we constructed bimetallic Ln-MOFs 1-Eu x Tb 1−x with excellent linear color tunability from green to red, suggesting that 1-Eu x Tb 1−x can be the candidates for optical imaging and barcode research.

We performed atomic-scale surface patterning with a vertical resolution of approximately 0.3 nm on a poly(methyl methacrylate) (PMMA) polymer sheet (10 ' 10 mm 2 ) by thermal nanoimprinting using an atomically stepped sapphire template (α-Al 2 O 3 single crystal). The sapphire mold with (10 12) r-plane exhibited regularly arranged straight steps with a uniform height of approximately 0.31 nm. The template nanopattern could be transferred onto the surface of the PMMA sheet under the imprinting conditions of 0.2 MPa load for 300 s at 140°C. Atomic stairs with approximately 0.26-nm-high straight steps and approximately 600-nm-wide terraces were formed on the PMMA surface.

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Theoretical calculation results unveil that the reconstructed Co(Ni)OOH on FeNiCo-MOF during OER processes is beneficial to improve OER activity. Experimentally, to achieve 2D trimetallic FeNiCo-MOF nanosheets, a facile room-temperature dispersion...

Two isomorphic lanthanide compounds {[Ln­(ddpp)­(H2O)]·CH3CN} n (Ln = Eu and Gd, H4ddpp = 2,5-di­(2′,4′-dicarboxylphenyl)­pyridine) were synthesized. Complex 1-Eu displays ultrahigh acid–base stability and thermal stability. Furthermore, luminescence measurements revealed that 1-Eu could detect quinolone antibiotics with an ultralow limit of detection in aqueous solution. The ratiometric probe properties for sensing antibiotics could be attributed to the incompletely sensitized Eu3+ ion of the ligand. Remarkably, it is interesting that 1-Gd exhibits excellent tetracycline degradation properties under visible light. Ultraviolet–visible diffuse reflectance spectroscopy and valence band X-ray photoelectron spectroscopy were carried out to investigate the photodegradation mechanisms. Moreover, a rational explanation for the fluorescent probe and photocatalysis behavior of these two complexes was also discussed with the assistance of density functional theory calculations.