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当前,开发新颖的、低用量的控制作物中杂生植物的化合物是人们关注的课题。原卟啉原氧化酶抑制剂便是美国杜邦公司Beleddy Kamireddy等作为除草剂的开发目标,并历经了相当时间的研究。植物在叶绿素生化合成中所必不可少的原卟啉氧化酶也是其他众多农药公司进行除草剂(1)开发的一个方向。在光照下,原卟啉抑制剂能使原卟啉IX单一氧化形成为光敏物质(2)积聚在外细胞膜上,导致细胞失活而使植物致死。这种酶抑制剂正是众多农药公司和研究机构的研究课题之一,并发表了不少专利和文章。原卟啉系由一个由 相似文献
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靶标原卟啉原氧化酶除草剂的发展 总被引:3,自引:1,他引:2
原卟啉原氧化酶在亚铁原卟啉与叶绿素生物合成中催化原卟啉原IX氧化成原卟啉IX,此种酶受到需光除导剂(protox inhibitors)的专门抑制,迅速造成细胞受害与干枯。论述了此类除草剂的作用机制、主要品种、新的活性化合物及抗性基因的转移。 相似文献
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卟啉化合物的合成方法综述 总被引:1,自引:0,他引:1
由于卟啉及其金属化合物在生物化学、医学领域、分析化学、合成化学、材料科学等领域中的应用都有了迅速的发展。所以对卟啉类化合物的研究具有重要意义。本文详细的介绍了卟啉卟啉化合物的合成方法。 相似文献
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卟啉化合物的应用与合成研究进展 总被引:6,自引:0,他引:6
卟啉化学是现代化学领域中重要的研究分支之一。概述卟啉化合物在医学、化学、生物学、材料学、能源等领域的应用;同时还介绍了卟啉化合物的合成方法。 相似文献
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卟啉化学是现代化学领域中重要的研究分支之一,文章综述了卟啉化合物的合成方法,以及卟啉化合物在生物医学、材料科学及催化化学等领域的应用. 相似文献
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《精细化工中间体》2017,(5):38-42
以meso-四(4-硝基苯基)卟啉为原料经硝基还原后制得meso-四(4-氨基苯基)卟啉,meso-四(4-氨基苯基)卟啉再经重氮化后分别与2-萘酚和8-羟基喹啉发生偶合反应得到meso-四[4-(2-羟基偶氮萘基)苯基]卟啉(卟啉1)和meso-四[4-(8-羟基偶氮喹啉)苯基]卟啉(卟啉2)。利用核磁共振氢谱、IR、UV-Vis、循环伏安法等确定了目标化合物的结构、光谱特征和电化学性能。紫外-可见光光谱测试结果表明,卟啉1和卟啉2的Q带与meso-四(4-氨基苯基)卟啉相比,吸收强度明显增强,并且卟啉2与卟啉1相比,在可见光区有明显的红移现象。用循环伏安法研究了两种偶氮卟啉染料的氧化还原性质,通过计算ELUMO和EHOMO值,得出其能级结构与纳米TiO_2的导带能级相匹配。 相似文献
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叙述了当前比较有发展前景的催化技术——生物催化、电催化和离子液体催化、光催化、超临界流体催化、微波催化、吸附团催化等及其应用。认为生物催化技术、电催化技术应用范围广泛、发展比较深入,但其他催化技术也具有其独特的优势,要实现绿色化工生产,应充分利用各种催化技术的优点。 相似文献
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Qi‐Lin Zhou 《Advanced Synthesis \u0026amp; Catalysis》2011,353(8):1199-1200
In 2000 China ranked 5th in the world (7.9%) in the publication of SCI papers on organic synthesis and catalysis; by 2008 China had become 1st (21.6%), followed by the USA, Germany and Japan. Major contributions made by Chinese research groups in the last decade in the areas of total synthesis of complex natural products, cross‐coupling, asymmetric catalysis, and heterogeneous catalysis are highlighted. The output and quality of the research on synthesis and catalysis from China continue to increase, so that with the rapid development of China’s economy, Chinese chemists will make greater contributions to organic synthesis and catalysis in the future. 相似文献
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Martin Moskovits 《Topics in Catalysis》2009,52(8):988-992
The refining of liquid fuels from petroleum has arguably had a larger effect on the field of (non-enzymic) catalysis than
any other industry, so much so that both the engineering and social norms resulting from, and supporting the petroleum industry
now affects both the agenda and problem-setting goals in the alternative fuels industry and consequentially in catalysis.
For example, there is great emphasis today on the development of biofuels that resemble in their properties and operation
gasoline and diesel. I argue that this is not necessarily the most prudent manner of using biomass as a fuel source and propose
that it is more prudent and efficient to convert biomass to electricity directly. If adopted, this would have a vast effect
on vehicle design, on electrical distribution strategies and investments and consequently on the pathways that research programs
in catalysis are likely to follow, replacing current emphases on producing and improving liquid fuels with ones affecting
such processes as combustion, and battery and other electrical storage and distribution issues. 相似文献
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生物酶法生产生物柴油具有化学催化法不可比拟的优越性,是工业化生产的发展方向。介绍了固定化脂肪酶在催化油脂酯交换制备生物柴油方面的应用,对影响酯交换反应的脂肪酶源、底物摩尔比率、酰基受体、水含量、反应温度、副产物等因素进行了综述。 相似文献
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介绍了在10%和30%的氢氧化钠中用聚乙二醇相转移催化苯甲醛的歧化反应。该反应能使苯甲酸的产率提高到90.5%和98.3%。同时还报道了在非相转移催化条件下,苯甲醛在15%至25%的氢氧化钠中,进行歧化反应的实验结果。 相似文献
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用XRD、TEM等分析技术对样品进行表征,并且催化剂对碱性藏花红染料的降解实验研究了制备方法对钙钛矿型氧化物SrCoOx及其光催化活性的影响,结果表明,用柠檬酸络合法制备的光催化活性比研磨法好。在含SrCoOx催化剂悬浮液中进行碱性藏花红染料光催化降解实验,结果表明:SrCoOx粉体具有较好的催化性,阳光照射4 h,可将碱性藏花红基本分解完全。 相似文献
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王贤贤 《化学工业与工程技术》2011,32(2):43-47
介绍了化学酯交换法、酶催化法、全细胞催化法等生产生物柴油的方法。指出了这一领域难以实现商业化的原因,并针对这些问题提出了相应的建议,分析了生物柴油的现状及发展趋势。 相似文献
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New Paradigms and Future Critical Directions in Heterogeneous Catalysis and Multifunctional Reactors
Makarand R. Gogate 《Chemical Engineering Communications》2017,204(1):1-27
Heterogeneous catalysis is a key pillar of the global industrial chemical and petrochemical sector, and 85% of all chemical products are produced with at least one catalytic step. Indeed, catalysis and catalytic reactors are a critical underpinning science for energy, environmental, and economic security. This paper reviews some future critical directions for research in catalysis science, toward a greener and more sustainable future. We believe that even a relatively mature field as heterogeneous catalysis and nanomaterials can be vitalized and spurred by major discoveries, but an outside-the-box thinking and a focused effort in a large plurality of disciplines is necessary. Thus, critical research needs in several areas, including heterogeneous and homogeneous catalysis, biocatalysis, photocatalysis, electrochemical conversions, and computational catalysis, are reviewed. The research needs of the future lie at the intersection of synthesis of novel nanostructured materials with tunable pore size distribution, controlled porosity, and high surface area; development of new catalytic applications for such materials; and the science of advanced characterization including in situ spatiotemporal analysis. In the area of computational catalysis, we believe that the future lies in the development of hybrid methods (parallel and serial) which can model the typical multiscale phenomena that are typically encountered in protein translocation and signal transduction, charge transport, enzymatic catalysis, surface chemistry, and self-assembly in complex fluids. As we promulgate the new directions to the catalysis fraternity, some prior research areas will unfortunately need to be relegated to obsolescence, to maintain a healthy balance on the research forefront. 相似文献
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纳米四氧化三铁化学法制备及其应用 总被引:2,自引:0,他引:2
纳米磁性材料作为一种新兴功能材料,由于其独特的物理化学性质,使其在物理、化学等方面表现出与常规磁性材料不同的特殊用途。纳米四氧化三铁就是其中一种多功能磁性材料,在磁记录材料、磁流体、催化、医药、颜料等方面具有广泛的应用。综述了近年来纳米磁性四氧化三铁的液相化学制备方法:共沉淀法、微乳液法、溶胶-凝胶法、溶剂热法等的研究现状以及最新的研究成果,对上述各种制备方法的优缺点进行了分析和比较。介绍了磁性纳米四氧化三铁在磁性液体、磁记录材料、催化、生物医药、微波吸收材料等方面的具体应用以及发展趋势,并提出其今后发展方向。 相似文献