Results 81 to 90 of about 40,893 (182)
酶促立体有择合成(1R,3S,5S)-1-乙炔基3-二苯叔丁硅氧基双环[3.1.0]己烷
四川大学学报. 自然科学版, 2002 (1R,3S,5S) 1 乙炔基 3 二苯叔丁硅氧基双环[3.1.0]己烷(3)是合成19 失碳 1α,25 二羟基维生素D3(2)的重要合成子.为了寻找更有效的可用于工业化生产的合成(3)的方法,作者以(±)外向 1 溴双环[3.1.0] 3 己醇(±4)为原料,经酶促立体有择反应得到光学活性的(1S,3S,5S) 1 溴 双环 [3.1.0] 3 己醇(4),再经羟基保护等3步反应得到目标物(3).实验结果表明,该合成方法实验操作简单、收率较高,所合成的(3)的光学纯度可达99 ...
郭丽, 伍晓春, 李佩杰, 吴勇
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Gongye shui chuli, 2020 探究了合成辣椒素对序批式反应器（SBR）的冲击情况，并研究了复合菌剂修复合成辣椒素冲击的效果和原理。结果表明在100 mg/L合成辣椒素的作用下，反应器的处理效率显著下降，活性污泥微生物群落受到冲击。复合菌剂的使用可能通过降解合成辣椒素，改善功能菌群的生存条件，恢复功能菌群的种类与含量，进而恢复了群落代谢功能，最终显著提高了SBR反应器的运行效果。
徐文倩, 叶姜瑜
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT To address critical issues in lithium–sulfur batteries, such as slow polysulfide conversion kinetics and shuttle effects, we designed and synthesized a high‐performance nanoalloy catalyst through a defect reconstruction strategy, aiming to enhance the electrochemical performance of batteries.
Zhijun Zhao +10 more
wiley +1 more source
Insights Into the Temperature‐Dependent Oxidation Mechanism of Metallic Cerium in H2O‐N2 Atmospheres
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metallic cerium (Ce), a widely used surrogate for actinide metals, enables mechanistic studies of reactions in complex gas environments under controlled and safer laboratory conditions. Here, the oxidation behavior of Ce in H2O‐N2 mixed atmospheres was investigated from 200°C to 350°C using in situ thermogravimetry–mass spectrometry, in situ X‐
Kun Huang +10 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Composites of metal–organic frameworks (MOFs)/two‐dimensional transition metal carbides/nitrides (MXene) have been widely recognized as promising electrode materials for advanced electrochemical energy storage systems due to their synergistic structural advantages and tunable electrochemical properties.
Wenjun Zhu +5 more
wiley +1 more source
Gongye shui chuli, 2015 以热活化粉煤灰为原料水合法合成4A沸石分子筛。通过实验确定出合成4A沸石分子筛的最佳条件, 在最佳条件下合成的4A沸石分子筛的钙离子交换能力为308 mg/g。用合成的4A沸石分子筛处理垃圾渗滤液, 结果表明, 在pH为8的60 mL垃圾渗滤液中加入9 g 4A沸石分子筛吸附40 min后, 垃圾渗滤液中的NH3-N、COD去除率分别为88%和74.2%。用粉煤灰合成4A沸石分子筛, 并将其用于垃圾渗滤液的处理具有一定的应用前景。
任根宽, 纪利春, 相亚军
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The design and synthesis of highly efficient electrochemical sensors are pivotal to electrochemical conversion technologies. This study successfully synthesized a composite material comprising two‐dimensional (2D) conductive MXene and nickel‐based metal–organic framework (Ni‐MOF) by stirring at room temperature.
Hai‐Xia Wu +8 more
wiley +1 more source
四川大学学报. 自然科学版, 1982 自从合成大环聚醚化合物以来,许多化学工作者对含氧,硫,氮的冠醚及穴醚等冠状化合物与很多金属离子的络合物进行了研究。这些工作指出,冠醚能与碱金属,碱土金属离子选择性地络合,生成可溶于有机溶剂的稳定络合物,环聚胺和穴醚与过渡金属,重金属离子络合,形成更加稳定的可萃络合物。因此冠状化合物可作为一种新型萃取剂,
冯易君, 陈文俊, 张大元, 祝霖
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT A facile coprecipitation‐pyrolysis strategy was employed to fabricate Cu/Co nanoparticles (NPs) embedded in nitrogen‐doped carbon matrices (Cu/Co@N‐C) through the carbonization of CuCo‐MOF precursors. Moreover, monometallic counterparts of Cu@N‐C and Co@N‐C were also prepared via carbonization of bimetallic CuZn‐MOF and CoZn‐MOF, respectively.
Weinan Yao +7 more
wiley +1 more source
四川大学学报. 自然科学版, 1983 本文报导了用PH滴定法及电池电动势法同时研究Ag（Ⅰ）-H3Ssal及Ag（Ⅰ）—Im—HSsal-体系的结果.发现在前一个体系中Ag（Ⅰ）与磺酰水杨酸无络合作用,后一个体系中亦无混配络合物生成。但我们在PH=8-8.5的条件下从体系中析出了组成相当于（AgIm2）2HSsal的三元化合物,培养了单晶,单晶结构分析的结果说明三元化合物中Ag+与HSsal-之间不成键Ag+只与Im成键,HSsal-是靠羧基氧与咪唑环上的N原子形成氢键而与AgIm2+结合起来的.因此HSsal-处在三元络合物的外界 ...
严繁诗 +4 more
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