针对二维单层BiOI纳米片的晶格热导率及其声子输运性质进行了深入探究。通过结合第一性原理计算和玻尔兹曼输运理论，系统地分析了单层BiOI纳米片在不同温度下的声子群速度、格林艾森参数、三声子散射率和散射相空间等关键物理量。计算结果显示，单层BiOI纳米片在室温下的本征晶格热导率约为4.71 W·m^-1·K^-1，当温度升高至800 K时，其热导率显著降低至1.74 W·m^-1·K^-1。面外声学支(ZA)、横向声学支(TA)和纵向声学支(LA)声子模式在所研究的温度范围内对晶格热导率的贡献几乎相等。低晶格热导率的物理根源归结于低声子群速度、强烈的声子-声子散射过程以及较低的德拜温度。此外，还探讨了单层BiOI纳米片的电子结构，确认了其具有半导体特性，并且间接带隙约为2.16 eV。

介绍了一场以推广环保理念为核心的产品发布会，重点展示了四款基于无患子的环保产品：无患子天然洗手液、无患子天然洗发水、无患子皂苷杀虫剂和无患子生物柴油。这些产品不仅利用了无患子的天然特性，而且在减少化学污染、保护环境方面发挥了重要作用。文章强调了每款产品如何体现无患子的环保价值，并概述了发布会的目标：激发公众环保意识，弘扬可持续发展理念，倡导“无患无忧”生活方式。通过这些创新产品，发布会旨在展示无患子在现代生活中的重要性，并鼓励人们采取行动，共同为环境保护工作做出贡献。

平衡核间距在研究双原子分子性质中有着非常重要的地位，通过光谱实验和量子化学计算都可以得到其平衡核间距。H₂是最简单的双原子分子，本文将以它为例介绍求同核双原子分子平衡核间距的光谱实验方法，包括拉曼光谱、电场诱导偶极矩跃迁光谱和四极矩跃迁光谱，并介绍其薛定谔方程的求解历史，尤其是平衡核间距和键解离能。

采用十六烷基三甲基溴化铵(CTAB)和六亚甲基亚胺(HMI)组成双模板体系，以气相二氧化硅为硅源，在150 ℃下动态原位合成了薄层的MWW型MCM-22分子筛纳米片，并考察了CTAB添加量对分子筛产物的影响。采用粉末X射线衍射(PXRD)、扫描电子显微镜(SEM)、N₂吸附-脱附、氨气程序升温脱附(NH₃-TPD)、高倍透射电子显微镜(HRTEM)、吡啶红外(Py-IR)和2，6-二叔丁基吡啶红外(DTBPy-IR)测试方法对合成的分子筛样品进行表征。结果表明：采用双模板体系可以制备出5~10 nm的薄层MWW型纳米片。同时，通过偏三甲苯异构化反应对样品的催化性能进行了表征，催化结果显示样品d-MWW-4%CTAB具有较好的催化性能，其中偏三甲苯的质量转化率、均三甲苯质量收率及均三甲苯选择性分别为34.97%、22.42%和64.09%，这主要归因于薄层纳米片MCM-22具有的较大外表面积和片层间形成的晶间介孔结构。

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.