A series of new lanthanide metal–organic frameworks (Ln-MOFs) [Ln₂(L)₃(H₂O)₄]·2H₂O (1) (Ln = Eu, Tb, Gd), and [Gd₂(H₂O)₄(L)(C₂O₄)₂]·3H₂O (2) were synthesized based on 4-hydroxypyridine-2,6-dicarboxylic acid (H₂L) under hydrothermal conditions. 1 exhibits isomorphous 2D wave-like networks constructed by paddle-wheel [Ln(L)₃] units and LnO₄(H₂O)₄ polyhedra. 2 shows a (4,4)-connected 3D framework with a Schlafli symbol of 6⁶. Oxalic acid in the resulting framework of 2 is formed in situ under hydrothermal conditions. Luminescence studies indicate that 1-Eu and 1-Tb show characteristic red and green emissions of the corresponding Ln³⁺ ions, respectively, while 1-Gd and 2 exhibit blue emission arising from the H₂L ligand. Then, by adjusting the co-doping ratio of three different Ln³⁺ ions into the same framework as that of 1, a novel doped Ln-MOF, [(Eu_0.0073Tb_0.0007Gd_0.992)₂(H₂O)₄(L)₃]·2H₂O (3), is successfully designed and synthesized, which shows white light emission upon excitation at 340 nm and its emission can also be switched between different colors. In addition, 1-Gd shows weak ferromagnetic interactions.

Great attention has been paid to silicone-based fouling-release coatings (FRCs) in the realm of maritime antifouling due to their highly efficient and eco-friendly properties, but many challenges remain for developing a silicone-based FRC that improves its adhesion performance without reducing the antifouling property. Herein, a non-toxic silicone-based FRC has been developed by integrating acrylic resin (AR) with a silicon resin (PDMS) to spontaneously form a self-stratified AR/PDMS coating. The AR/PDMS antifouling coating still has the same fouling-release performance but improved adhesion strength (from 0.4 to 2.0 MPa) in comparison with pristine PDMS. Moreover, the antifouling coating has proven to be extremely stable in different environments (such as pH, heating, and ultraviolet exposure). The study provides a facile and convenient self-stratified strategy to develop antifouling coatings, contributing to environmentally friendly coatings in marine applications.

A novel porous chiral In-MOF InH(D-C₁₀H₁₄O₄)₂ (1) with a left-handed helical channel assembled from D-(+)-camphoric acid (D-H₂Cam), has been prepared under solvothermal conditions. Single-crystal X-ray diffraction analysis reveals that compound 1 crystallizes in the tetragonal space group P4₃2₁2 (no. 96) with parameters: a = 13.8954 Å, b = 13.8954 Å, c = 17.7870 Å, V = 3434.4(7) Å ³, Z = 4. The framework feature of compound 1 is characteristic of four-connected anionic-type diamond net with left-handed chiral channel. Moreover, compound 1 exhibits high surface area.

Two novel dual-functional fluorescent composites were prepared, which exhibit excellent fluorescence sensing capabilities for Fe³⁺, p-NT and 2,4-DNP.