【无机化学学报】doi: 10.11862/CJIC.20230368
Based on Ⅴ-shaped auxiliary ligands, two novel coordination polymers, {[Cd(bipmo)(NDC)]·1.75H2O}n (1), {[Cd(bppmo)(NDC)(H2O)]·H2O}n (2), where H2NDC=2,6-naphthalenedicarboxylic acid, bipmo=bis(4-(1H-imidazol-1-yl)phenyl)methanone, bppmo=bis(4-(pyridin-4-yl)phenyl)methanone, have been synthesized under solvothermal conditions. They have been characterized by single-crystal X-ray diffraction, bond valence sum calculations, IR spectra, and elemental analyses. Complex 1 shows 2-fold interpenetrating sheets of {63} topology, which interpenetrate in a 2D → 2D parallel manner. Complex 2 reveals a 3-fold interpenetrating {63} network. The results indicate that the Ⅴ-shaped ligands have a great effect on the formation of the final structures. In addition, the luminescent properties of complexes 1 and 2 were investigated in detail.
【无机化学学报】doi: 10.11862/CJIC.20230479
Three zinc coordination polymers, {[Zn2(bipmo)2(ipa)2]·3H2O}n (1), {[Zn(bipmo)(5-OH-ipa)]·DMA·H2O}n (2), and {[Zn(bipmo)(5-Me-ipa)]·H2O}n (3), where bipmo=bis(4-(1H-imidazol-1-yl)phenyl)methanone, H2ipa=isophthalic acid, 5-OH-ipaH2=5-hydroxyisophthalic acid, 5-Me-ipaH2=5-methylisophthalic acid, were synthesized under solvothermal conditions. These complexes have been characterized by elemental analyses, IR spectra, single-crystal X-ray diffraction, etc. Complex 1 shows a 2D 2-fold interpenetrating {44·62} network. Complex 2 displays a 2D uninodal framework with the {65·8} topology. Complex 3 reveals a 2D layer structure with {63} topology. The results indicate that the presence of a 5-substituted group in the isophthalate exerts a significant influence on the formation of the final structures. The luminescent properties of the complexes in the solid state have also been studied.
【大学化学】doi: 10.12461/PKU.DXHX202311055
现代社会中,化学和相关工业的快速发展导致水环境污染问题日益严重,这对水质检测以及水资源的处理技术提出了更高的要求,然而目前尚难以快速、高效地实现对低浓度、痕量的污染物的检测和处理。为此,科学家们设计出一类新型的智能材料——微纳米机器人。基于微纳米机器人的可控运动性能、精准识别能力、高效吸附效果和原位降解能力,可以对痕量污染物建立高灵敏度的响应,从而实现水中污染物的有效检测与处理。为了能够让广大读者深入理解微纳米机器人在水污染检测和处理领域的发展前沿和未来研究趋势,本文以微纳米机器人组织“污染刺客联盟”为背景,简单有趣地介绍了微纳米机器人在水环境检测、监测和处理方面的应用及其科学机理。
【大学化学】doi: 10.12461/PKU.DXHX202404113
“我们能人工合成一个细胞吗?Can a cell be artificially synthesized?”——这是2021年《科学》期刊新发布的世界最前沿的125个重大科学问题之一。科学家为了揭示“生命起源”的奥秘以及解决世界关注的重大基础科学问题,设计出人造细胞这类仿生材料。它们最明显的特点就是具有与生物细胞类似的结构与功能。因此,深入研究人造细胞,不仅有利于研究真实细胞的结构与功能机制,还有助于建立非生物物质与真实细胞之间的联系,从而搭建非生命系统与生命系统之间的桥梁,为生命起源等相关研究提供实验与理论依据。而磷脂囊泡作为目前应用最为广泛的人造细胞更是有着广阔的应用前景。为了使“磷脂囊泡”这类材料以及相关研究技术得到更广泛的认识,本文基于耳熟能详的四大名著之一——《西游记》,讲述了孙悟空凭借火眼金睛帮助磷脂囊泡战胜癌细胞的故事,介绍了磷脂囊泡的设计和制备、代表功能以及体内治疗案例,以期促进广大读者对该技术的理解,并激发更多该技术潜在的应用可能。
【无机化学学报】doi: 10.11862/CJIC.20240206
采用传统固相法制备了La3+掺杂的0.28Pb (In1/2Nb1/2) O3-0.32Pb (Zn1/3Nb2/3) O3-0.3PbTiO3-0.1PbZrO3(PIN-PZN-PZT)四元压电陶瓷,研究了La3+掺杂量对PIN-PZN-PZT四元压电陶瓷微观结构和电学性能的影响。结果表明:引入La3+可以增强压电陶瓷局部结构异质性,进而提升介电弛豫特性并提高压电性能。当La2O3含量为1.5%时,获得了兼具高电致应变(0.23%)和高居里温度(206℃)的压电陶瓷材料。
【无机化学学报】doi: 10.11862/CJIC.20240399
A Zn(Ⅱ)-based coordination polymer (CP), {[Zn2(bdc)2(mfdp)]2·4DMA·2Me2NH·3H2O}n (1), was synthesized by solvothermal method based on H2bdc and mfdp, where H2bdc=1, 4-benzenedicarboxylic acid, mfdp=2, 7-bis (4-pyridyl)-9, 9-dimethylfluorene, and DMA=N, N-dimethylacetamide. It was characterized by FTIR, elemental analysis, TGA, and single-crystal X-ray diffraction. In 1, two adjacent zinc ions lie in the same {ZnNO4} geometrical configurations, forming a paddle-wheel building block. Complex 1 displays 2-fold interpenetrating frameworks with {412· 63} topology and with the emission peak situated at 385 nm, which offers a good foundation to be integrated as a chemical sensor. The fluorescence sensing experiments showed that the LOD (limit of detection) of 2, 4, 6-trinitrophenol (TNP) was 0.164 μmol·L-1, and the quenching constant (KSV) was 6.65×104 L·mol-1, indicating the excellent detection ability of trace analytes in DMA.