能材料家族族长选拔记
徐运鑫, 张文博, 颜静, 耿旺昌, 闫毅
【大学化学】doi: 10.3866/PKU.DXHX202307008
含能材料自出现以来就在民生、国防领域发挥巨大作用。本文作为一篇科普文章,通过拟人的手法,简单介绍了含能材料的基本种类、基本性质,并着重介绍一些重要含能材料的性质和应用。希望能增强读者对含能材料的兴趣,引发读者对含能材料的思考,从而打破对含能材料认知的固有印象。
关键词: 含能材料, 炸药, 火药, 复合含能材料
磷废水的处理及排放评价
王静, 李平平, 王玥辉, 修一凡, 张秉乾, 王书文, 高洪涛
【大学化学】doi: 10.3866/PKU.DXHX202309097
对分析化学实验“分光光度法测定水和废水中总磷”进行改进:以绿色无毒的麦饭石为载体,制备ZnFe-LDHs (层状双金属氢氧化物)改性麦饭石吸附材料,运用FTIR、XRD、SEM、EDS-mapping等手段进行表征,探索出ZnFe-LDHs改性麦饭石对磷的最优吸附处理条件,去除率大于98.4%。含磷废水经改性麦饭石吸附处理后,磷的浓度小于0.08 mg∙L−1,符合磷一级排放标准。该改进实验内容丰富,综合性强,学生在践行“绿色化学”理念中,综合研究能力和团队协作能力得到培养提升,适合推广至本科生高年级教学。
关键词: 改性麦饭石, 吸附, 磷含量测定, 环境友好, 创新设计与改进
氮环烷烃选择性构建功能化芳烃研究进展
张云皓, 王一诺, 王思然, 徐大振
【大学化学】doi: 10.3866/PKU.DXHX202401083
含氮杂环类化合物广泛存在于自然界,具有多种生物活性。近几年,使用含氮环烷烃作为原料合成含氮芳烃成为目前的一个研究热点,该方法无需导向基团,可选择性地一步实现C—C、C—N、C—S和C—Se键的构建和芳构化。本文整理了近年来有关该方法构建功能化喹啉和吲哚的文献报道,进行了系统的梳理和综述,并对该领域未来的发展作出展望。
关键词: 吲哚, 喹啉, 去氢化, 芳构化
Structure variation of cadmium naphthalene-diphosphonates with the changing rigidity of N-donor auxiliary ligands
Yan XU, Suzhi LI, Yan LI, Lushun FENG, Wentao SUN, Xinxing LI
【无机化学学报】doi: 10.11862/CJIC.20240226
Five cadmium naphthalene-diphosphonates, formulated as [Cd1.5(1,4-ndpaH2)2(4,4′-bpyH)(4,4′-bpy)0.5(H2O)2]2 (1), [Cd(1,4-ndpaH2)(1,4-bib)0.5(H2O)] (2), [Cd(1,4-ndpaH3)2(1,2-dpe)(H2O)]·(1,2-dpe)·7H2O (3), (1,2-bixH)[Cd3(1,4-ndpaH)(1,4-ndpaH2)2(H2O)2] (4), and [Cd(1,4-ndpaH2)(H2O)]·H2O (5), have been synthesized from the self-assembly reactions of 1,4-naphthalenediphosphonic acid (1,4-ndpaH4) with Cd(NO3)2·4H2O by introducing auxiliary ligands with variation of rigidity, such as 4,4′-bipyridine (4,4′-bpy), 1,4-bis(1-imidazolyl)benzene (1,4-bib), 1,2-di(4-pyridyl)ethylene (1,2-dpe), 1,3-di(4-pyridyl)propane (1,3-dpp), and bis(imidazol-1-ylmethyl)benzene (1,2-bix), respectively. Structure resolution by single-crystal X-ray diffraction reveals that compound 1 possesses a layered framework, in which the {Cd3(PO2)2} trimers made up of corner-sharing two {CdO4N2} and one {CdO6} octahedra are connected by phosphonate groups, forming a ribbon, which are cross-linked by 4,4′-bipy ligands, forming a 2D layer. Compound 2 shows a 3D open-framework structure, where chains of corner-sharing {CdO4N} trigonal bipyramids and {PO3C} tetrahedra are cross-linked by 1,4-bib and/or phosphonate groups. A 1D ladder-like chain structure is found in compound 3, where the ladder-like chains made up of corner-sharing {CdO5N} octahedra and {PO3C} tetrahedra are connected by 1,4-ndpaH22-. Both compounds 4 and 5 obtained by the introduction of flexible ligands during the synthesis show a 2D layered structure, which is formed by ligand crosslinking double metal chains. Interestingly, In 4, flexible 1,2-bix was singly protonated, as guest molecules, filled between layer and layer, while flexible ligand 1,3-dpp is absent in 5. Photophysical measurements indicate that compounds 1-5 show ligand-centered emissions.
关键词: naphthalene diphosphate, N-donor auxiliary ligands, crystal structure, rigidity, flexibility
低聚醚链共价有机骨架薄膜材料的制备及其离子分离性能
谢文典, 隆月华, 谢健阳, 邢丽群, 佘世雄, 杨燕, 黄智昊
【无机化学学报】doi: 10.11862/CJIC.20240050
用2,5-二(2-甲氧基-乙氧基)对苯二甲酰肼(BMTH)和1,3,5-三甲氧基-2,4,6-三甲酰基苯(TpOMe)缩聚,基于界面聚合法,在多孔三氧化二铝(AAO)基底上制备出一种二维共价有机骨架(COF)膜TpOMe-BMTH,并研究了所得膜材料对锂、镁离子的分离性能。结果显示,TpOMe-BMTH/AAO膜具有高的结晶性和良好的稳定性,并表现出优异的金属离子选择性,在LiCl(0.1 mol·L-1)和MgCl2(0.1 mol·L-1)组成的二元混合离子体系中,对Li+/Mg2+的分离因子高达258。基于密度泛函理论的平面波赝势方法计算表明,材料孔道中的富氧低聚醚链对Li+和Mg2+的结合能分别为-282.69和-13.46 kJ·mol-1,使材料表现出强的亲锂特性,促进了Li+沿着COF膜的一维孔道进行吸附扩散,最终实现锂、镁离子的高效分离。
关键词: 共价有机骨架, 薄膜, 离子分离
硒氮杂中环的光化学合成、分析及表征综合实验设计
刘菲, 赵冬阳, 孙凯, 于婷婷, 王薪
【大学化学】doi: 10.3866/PKU.DXHX202309047
化学综合实验在大学化学教学中处于基础核心地位。作者结合团队最新研究成果,设计了一个可见光诱导合成含硒七元氮杂中环的综合实验。通过底物设计制备→可见光催化合成→结构表征分析等环节,对学生连续多步合成操作、过程分析和结构解析等技能进行系统训练,培养学生学习的系统性、全面性。在此基础上,学生可以充分了解光化学反应的前沿和优势,培养学生绿色化学意识。
关键词: 光化学, 氮杂环, 有机硒
四烯基吡啶配体的Zn(Ⅱ)配位聚合物的合成、结构及其荧光性质
桑笑, 刘琦, 郎建平
【无机化学学报】doi: 10.11862/CJIC.20240158
在3,5‐二硝基苯甲酸(3,5‐HDNBA)、4‐吡唑羧酸(4‐H2PyC)或对乙基苯甲酸(4‐HEBA)存在下,Zn(NO3)2·6H2O与1,2,4,5‐四(4‐乙烯基吡啶基)苯(tkpvb)发生溶剂热反应,制备了[Zn(tkpvb)(3,5‐DNBA)2]n (CP1)、{[Zn(tkpvb)(4‐PyC)]·2H2O]}n (CP2)和{[Zn(tkpvb)0.5(4‐EBA)2]·H2O}n (CP3)三种Zn(Ⅱ)基配位聚合物(CPs)。通过红外光谱、元素分析、粉末X射线衍射和单晶X射线衍射对它们进行了结构表征。CP1具有一维“之”字形链状结构,CP2CP3则分别呈现六连接和四连接的三维拓扑结构。CP1~CP3均表现出光致发光现象,对无机金属离子有一定的响应性能。其中,Fe3+离子对CP1的荧光强度影响最大,检测限达到0.020 μmol·L-1。这可能是Fe3+CP1中不配位的吡啶基之间的相互作用引起的。
关键词: 四烯基吡啶, 配位聚合物, 结构, 荧光, 金属离子检测
Structure and magnetic properties of Mn(Ⅱ) coordination polymers regulated by N-auxiliary ligands
Xiaxia LIU, Xiaofang MA, Luxia GUO, Xianda HAN, Sisi FENG
【无机化学学报】doi: 10.11862/CJIC.20240269
Two new Mn(Ⅱ) coordination polymers, namely {[Mn2(HL)(phen)3(H2O)2]·7.5H2O}n (1) and [Mn4(HL)2(1, 4-bib)3(H2O)2]n (2), were synthesized under hydrothermal conditions by using Mn(Ⅱ) ions and 6-(3′, 4′-dicarboxylphenoxy)-1, 2, 4-benzenetricarboxylic acid (H5L) in the presence of N-auxiliary ligands 1, 10-phenanthroline (phen) and 1, 4-bis(1H-imidazol-1-yl)benzene (1, 4-bib). The structures of coordination polymers 1 and 2 were characterized by infrared spectroscopy, single-crystal X-ray diffraction, thermogravimetric analysis, and powder X-ray diffraction. Single-crystal X-ray diffraction reveals that 1 has a 1D chain structure based on binuclear Mn(Ⅱ) units, while 2 features a (3, 8)-connected 3D network structure based on tetranuclear Mn(Ⅱ) units. Magnetic studies show that 1 and 2 exhibit antiferromagnetic interactions between manganese ions. 2 shows stronger antiferromagnetic interactions due to the shorter Mn…Mn distances within the tetranuclear manganese units.
关键词: coordination polymers, crystal structures, binuclear Mn(Ⅱ) unit, tetranuclear Mn(Ⅱ) unit, magnetism
两个5-溴水杨酸钠(Ⅰ)/镉(Ⅱ)配合物的合成、晶体结构、Hirshfeld表面分析与抑菌活性
熊欣婷, 熊志强, 肖攀蕾, 聂旭亮, 宋秀英, 易绣光
【无机化学学报】doi: 10.11862/CJIC.20240145
由5-溴水杨酸(H2BBA)合成了钠(Ⅰ)/镉(Ⅱ)配合物[Na (HBBA)]n(1)和[Cd (HBBA)2(4,4'-Bipy)]n(2)(H2BBA=5-溴水杨酸,4,4'-Bipy=4,4'-联吡啶)。通过元素分析、红外光谱、热重、粉末X射线衍射和单晶X射线衍射表征了其结构。配合物1的不对称单元中有1个钠离子和1个HBBA-。钠离子是六配位的三棱柱构型,HBBA-配体的3个氧原子分别与2个钠离子配位,连接相邻的钠离子形成了3条一维链结构,HBBA-配体连接相邻的3条一维链形成了二维网络结构。分子间氢键连接相邻的二维网络结构形成了三维氢键网络结构。配合物2中有1个镉离子、2个HBBA-和1个4,4'-Bipy。镉离子是六配位的扭曲八面体构型,4,4'-Bipy配体连接相邻的2个镉离子形成了一维链结构。分子间氢键连接相邻的一维链结构形成了三维氢键网络结构。通过Hirshfeld表面和指纹图分析了配合物晶体中的弱分子间作用力。详细研究了配合物12的热稳定性和抑菌活性。
关键词: 5-溴水杨酸, 配合物, 合成, 晶体结构, Hirshfeld表面分析, 抑菌活性
Syntheses, structures, and properties of three coordination polymers based on 5-ethylpyridine-2,3-dicarboxylic acid and N-containing ligands
Long TANG, Yaxin BIAN, Luyuan CHEN, Xiangyang HOU, Xiao WANG, Jijiang WANG
【无机化学学报】doi: 10.11862/CJIC.20240180
Three coordination polymers [Mn(epda)(2,2′-bipy)(H2O)] (1), [Mn(epda)(phen)] (2), and [Co2(epda)2(bpe)2(H2O)4]·5H2O (3) (H2epda=5-ethyl-pyridine-2,3-dicarboxylic acid, 2,2′-bipy=2,2′-bipyridine, phen=phenanthroline, bpe=1,2-bis(4-pyridyl) ethylene) were synthesized by solvothermal reactions and characterized by single-crystal X-ray diffraction, thermogravimetric analyses, IR spectroscopy and elemental analysis. 1 displays a 1D chain structure, and these chains are joined by O—H…O hydrogen bonding and π-π stacking interactions to generate a 2D layer structure. 2 displays a 2D layer structure, and adjacent layers are generated 3D architecture through π-π stacking interactions. 3 displays a 1D chain structure, and adjacent chains are generated double layer structure through O—H…O hydrogen bonding. The fluorescent properties of 1 and 3 indicate that they can potentially be used as a luminescent sensor. 1 was highly selective and sensitive towards o-nitrophenol through different detection mechanisms, however, 3 was highly selective and sensitive towards 2,4,6-trinitrophenol. In addition, the magnetic behavior of 2 has also been investigated.
关键词: coordination polymers, 5-ethyl-pyridine-2,3-dicarboxylate ligand, crystal structures, fluorescent properties, magnetic behavior

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