Highly stable DUT-52 materials were synthesized by the hydrothermal method and well-characterized by X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, and X-ray photoelectron spectroscopy (XPS). In order to systematically study the adsorption of dichromate ions in aqueous solution by the DUT-52 materials, a single factor experiment, kinetic experiment, thermodynamic experiment, competition ion experiment, and material regeneration experiment were designed. Based on the H-bond interaction between the dichromate ions and the H atoms of a NDC 2– ligand, the DUT-52 materials showed a maximum removal rate of 96.4% and a maximum adsorption capacity of 120.68 mg·g –1 with excellent selective adsorption and material regeneration. In addition, the process of adsorption of dichromate ions by the DUT-52 materials is in accordance with the pseudo second-order kinetics and Langmuir models, and the adsorption mechanism and the important role of the H-bond interaction were reasonably explained using the XPS pattern and theoretical calculation. Accordingly, DUT-52 can be regarded as a multifunctional material for efficiently removing dichromate ions from the wastewater.

The Zn II -Co II organic framework [Me 2 NH 2 ][Zn 2 Co(μ 3 -OH) (BTC) 2 (H 2 O)]·2H 2 O (FJI-6) (H 3 BTC = 1,3,5-benzenetricarboxylic acid and DMA = N.NЈ-dimethyl acetamide), was synthesized and structurally characterized. FJI-6 shows a three-dimensional hetero-* Dr. J. Qian 579 metallic microporous framework with coexisting octahedral cages and one-dimensional channels assembled by Zn 2 Co(μ 3 -OH)(CO 2 ) 6 secondary building units. In addition, the sorption behavior and magnetic properties of FJI-6 were investigated.

Two dinuclear lanthanide complexes with pentadentate ligand 3-[bis(pyridine-2-ylmethyl)amino]propane-1,2-diol (H 2 L), formulated as [Ln 2 (HL) 2 (NO 3 ) 2 (H 2 O) 2 ]·1.5NO 3 ·0.5I [Ln = Tb (ZTU-1) and Eu (ZTU-2); ZTU = Zhaotong University] were synthesized and

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A mixed lanthanide organic framework was prepared via hydrothermal methods using m-phthalic acid (m-H2BDC), 1,10-phenanthroline (1,10-Phen), and Ln3+ ions, formulated as [HNMe2][Eu0.095Tb1.905(m-BDC)3(phen)2] (ZTU-6). The structure and stability of ZTU-6 were characterised by X-ray diffraction (XRD) and thermogravimetric analysis (TGA), which revealed a three-dimensional pcu topology with high thermal stability. Fluorescence tests showed that ZTU-6 emitted orange light with a high quantum yield of 79.15%, and it can be effectively encapsulated in a light-emitting diode (LED) device emitting orange light. In addition, ZTU-6 was found to be compatible with BaMgAl10O17:Eu2+ (BAM) blue powder and [(Sr,Ba)2SiO4:Eu2+] silicate yellow and green powder to create a warm white LED with a high colour rendering index (CRI) of 93.4, a correlated colour temperature (CCT) of 3908 K, and CIE coordinates of (0.38, 036).