罗丹宁骨架广泛存在于合成化合物中，含有这种结构单元的分子常常表现出优异的生物活性和药理作用，包括抗糖尿病、抗菌、抗癌和抗HIV (艾滋病)活性等。它们还可以用作光电材料、染料和分析试剂。本文首先介绍罗丹宁及其衍生物的性质和应用情况，然后对其制备方法进行总结，并提出该研究领域未来发展前景。

用混合配体苯甲酸(HBA)和4-羟基-2，2'∶6'，2″-三联吡啶(4-OH-terpy)，与镧系硝酸盐通过超声溶解和常规溶液法成功合成了2种新型镧系元素配合物：[Sm₂(BA)₆(4-OH-terpy)₂]·2H₂O·2EtOH (1)和[Pr₂(BA)₆(4-OH-terpy)₂(H₂O)₂]·HBA·H₂O (2)。在合成过程中，4-羟基-2，2'∶6'，2″-三联吡啶作为中性配体参与反应，而苯甲酸则以去质子化形式(BA-)作为酸性配体与镧系离子配位。这2种配合物的晶体结构通过单晶X衍射得到了精确解析。同时还采用了元素分析、红外和拉曼光谱以及粉末X射线衍射技术来深入探究这2种配合物的物理化学性质。单晶X射线衍射数据显示，尽管2种配合物的结构存在差异，但它们均属于三斜晶系$P \overline{1}$空间群，且中心镧系元素离子具有相同的配位数，但配位环境却有所不同。为了全面评估这2种配合物的热稳定性，进一步实施了包括热重分析-微分热重分析-差示扫描量热法、傅里叶变换红外光谱分析以及质谱联用(TG-DTG-DSC/IR/MS)技术在内的综合测试。同时对配合物逸出气体的三维红外堆积图和质谱图进行了深入探究。此外，对配合物1的荧光特性研究表明，它能够展现出与Sm³⁺特征跃迁相匹配的荧光发射。

Six new lanthanide complexes: [Ln(3,4-DEOBA)₃(4,4′-DM-2,2′-bipy)]₂·2C₂H₅OH, [Ln=Dy (1), Eu (2), Tb (3), Sm (4), Ho (5), Gd (6); 3,4-DEOBA^-=3,4-diethoxybenzoate, 4,4′-DM-2,2′-bipy=4,4′-dimethyl-2,2′-bipyridine] were successfully synthesized by the volatilization of the solution at room temperature. The crystal structures of six complexes were determined by single-crystal X-ray diffraction technology. The results showed that the complexes all have a binuclear structure, and the structures contain free ethanol molecules. Moreover, the coordination number of the central metal of each structural unit is eight. Adjacent structural units interact with each other through hydrogen bonds and further expand to form 1D chain-like and 2D planar structures. After conducting a systematic study on the luminescence properties of complexes 1-4, their emission and excitation spectra were obtained. Experimental results indicated that the fluorescence lifetimes of complexes 2 and 3 were 0.807 and 0.845 ms, respectively. The emission spectral data of complexes 1-4 were imported into the CIE chromaticity coordinate system, and their corresponding luminescent regions cover the yellow light, red light, green light, and orange-red light bands, respectively. Within the temperature range of 299.15-1 300 K, the thermal decomposition processes of the six complexes were comprehensively analyzed by using TG-DSC/FTIR/MS technology. The hypothesis of the gradual loss of ligand groups during the decomposition process was verified by detecting the escaped gas, 3D infrared spectroscopy, and ion fragment information detected by mass spectrometry. The specific decomposition path is as follows: firstly, free ethanol molecules and neutral ligands are removed, and finally, acidic ligands are released; the final product is the corresponding metal oxide.