为马,诗“酒”趁年华
张天龙, 宋晨佳, 赵文敏, 汤宏胜, 李延, 李华
【大学化学】doi: 10.12461/PKU.DXHX202403076
酒,乃天地之精华,文化之载体,品一杯佳酿,如同品一段历史,品一份人生。白酒在各种场合中发挥着重要作用,它不仅仅是一种饮品,还寄托着人们对美好生活的向往和追求。本文采用生动形象的对话形式,通俗易懂地描述了白酒酿制的五个主要过程——选料、糖化、发酵、蒸馏和陈酿,重点介绍了其中的主要化学成分以及酿制过程中的化学反应,白酒的酿造过程体现了匠心独运的精神以及酒文化的博大精深。通过品味白酒,可以更好地感悟人生的哲理和智慧。好酒需要陈放才能更加醇香,人生也需要经历岁月的沉淀才能更加丰富多彩。
关键词: 白酒, 酿制, 科普, 化学物质
Synthesis, structures, and properties of metal-organic frameworks based on bipyridyl ligands and isophthalic acid
Jimin HOU, Mengyang LI, Chunhua GONG, Shaozhuang ZHANG, Caihong ZHAN, Hao XU, Jingli XIE
【无机化学学报】doi: 10.11862/CJIC.20240348
(2E, 6E)-4-methyl-2, 6-bis(pyridin-3-ylmethylene)cyclohexan-1-one (L1) and 4-methyl-2, 6-bis[(E)-4-(pyridin-4-yl)benzylidene]cyclohexan-1-one (L2) were synthesized and combined with isophthalic acid (H2IP), then under solvothermal conditions, to react with transition metals achieving four novel metal organic frameworks (MOFs): [Zn(IP)(L1)]n (1), {[Cd(IP)(L1)]·H2O}n (2), {[Co(IP)(L1)]·H2O}n (3), and [Zn(IP)(L2)(H2O)]n (4). MOFs 1-4 have been characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetry, and elemental analysis. Single-crystal X-ray diffraction shows that MOF 1 crystallizes in the monoclinic crystal system with space group P21/n, and MOFs 2-4 belong to the triclinic system with the P1 space group. 1-3 are 2D sheet structures, 2 and 3 have similar structural characters, whereas 4 is a 1D chain structure. Furthermore, 1-3 exhibited certain photocatalytic capability in the degradation of rhodamine B (RhB) and pararosaniline hydrochloride (PH). 4 could be used as a heterogeneous catalyst for the Knoevenagel reaction starting with benzaldehyde derivative and malononitrile. 4 could promote the reaction to achieve corresponding products in moderate yields within 3 h. Moreover, the catalyst exhibited recyclability for up to three cycles without significantly dropping its activity. A mechanism for MOF 4 catalyzed Knoevenagel condensation reaction of aromatic aldehyde and malononitrile has been initially proposed.
关键词: bipyridyl ligands, metal-organic frameworks, photocatalytic degradation, Knoevenagel condensation
含甲基紫精单元的多酸杂化材料对β-氨基醇的高效催化合成
李梦洋, 徐昊, 牛中豪, 宫春华, 钟为慧, 谢景力
【无机化学学报】doi: 10.11862/CJIC.20250080
以1,1′-二甲基-4,4′-联吡啶(甲基紫精,MV)二氯化物和Keggin型多酸单元合成的晶态材料(MV)2[HPW2W10O40]·2H2O为催化剂,在无有机溶剂、室温条件下合成了一系列β-氨基醇类化合物。该催化剂不仅能够高效催化β-氨基醇的合成,而且具有良好的稳定性及可回收性。经过6次循环使用后,催化剂活性未出现明显下降,表明其具有较好的循环利用潜力。与传统方法相比,该反应体系不使用有机溶剂并具有反应条件温和、操作简单、环境友好等优点。
关键词: 紫精, 多酸, 催化应用, β-氨基醇

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