钴(Ⅱ)基分子配合物用于光催化二氧化碳还原

Nowadays, more than 85% of the energy is generated by fossil fuels. The excessive utilization of finite fossil fuels has resulted in the crises of energy shortage and global warming caused by greenhouse gas emissions. Researchers have conceived several means for trying to solve these problems, among which the sunlight-driven CO₂ reduction is viewed as a sustainable process that utilizes CO₂ as the raw material to produce chemical fuels, including CO, formate, and CH₄; this method not only realizes the conversion and storage of intermittent solar energy, but also decreases the CO₂ concentration in the atmosphere and alleviates global warming. However, photochemical CO₂ reduction usually undergoes a sluggish process due to the inertness of CO₂. Moreover, the selectivity of the CO₂ reduction reaction is also challenged by the hydrogen evolution reaction, which exhibits faster reaction kinetics. In this context, the rational design and synthesis of efficient and selective catalysts for photochemical CO₂ reduction are major challenges.     

维生素B12修饰电极及其催化氧还原性质的研究

发现给生素Ｂ１２能吸附在经阳极化处理的玻碳电极上，从而制成稳定的维生系Ｂ１２修饰玻碳电极详细研究了此电极的电化学性质。并发现此修饰电极能有效地催化分子氧的二电极还原。     

Ni—WC复合电极的结晶结构及其电化学性能的研究

本文在优选的工艺条件下制备了Ｎｉ－ＷＣ复合电极。其ＳＥＭ观察和ＸＲＤ测试结果表明：复合电极中的Ｎｉ是以比Ｎｉ电极的Ｎｉ更微小的晶粒存在。复合电沉积过程中，导电性的ＷＣ微粒的存在，对基质金属Ｎｉ的电沉积方式产生了影响，使基质金属Ｎｉ几乎无择优取向性。采用循环伏安法对其电化学性能进行研究，实验结果表明：Ｎｉ－ＷＣ复合电极在碱性水溶液析氢反应中与Ｈ质子之间的吸附作用及吸附量高于Ｎｉ电极，对硝基苯的电还原反应具有比Ｎｉ电极更良好的催化活性。     

Low-valent Titanium Induced Intramolecular Reductive Coupling of Keto-enamines:A Facile Synthesis of 2,3,5-Trisubstituted Pyrroles

Promoted by low-valent titaium reagent which was generated in situ from Sm/TiCl4 system,keto-enamine derivatives underwent efficient intromolecular deoxygenative coupling reactions and afforded the corresponding 2,3,5-trisubstituted pyrroles in moderate to good yields under mild reaction conditions.     

酶的光谱电化学研究（Ⅰ）：辣根过氧化物酶的电化学性质

利用薄层光谱电化学技术研究了辣根过氧化物酶(HRP)及其化合物的氧化还原过程。指出HRP可在固体电极上进行直接电子传递,该电极反应不是酶中二硫键的还原,而是血红素辅基中心金属离子的氧化态转变。测定了HRP(Fe~(3+)/Fe~(2+))电对的标准氧化还原电位和电化学动力学参数,讨论了HRP氧化性中间物的电化学性质。     

Facile Synthesis of Gold Nanoplates by Citrate Reduction of AuCl4^- at Room Temperature

Metal and semiconductor nanoparticles with nonspherical shapes, such as wires1, cubes2,3 and belts4, have been drawing a great interest in scientific community as a result of their physical and chemical properties being distinctly different from conventio…     

分散法制备的CuCl／ZSM—5分子筛催化上C3H6选择性催化还原NO …

研究了由分散法制备的ＣｕＣｌ／ＺＳＭ－５分子筛催化剂上丙烯在过量氧存在下选择催化还原ＮＯ反应，发现该法能使活性组份高度分散于载体上，且所制备的高负载量ＣｕＣ；／Ｈ－ＺＳＭ－５与离子交换法制备的Ｃｕ－ＺＳＭ－５相比在较低反应温度下具有更高的反应活性。     

关于氢化铝锂和硼氢化钠还原醛酮成醇的反应式

关于氢化铝锂和硼氢化钠还原醛酮成醇的反应式蒋达荣（内江师范高等专科学校四川６４１００２）在中外不同版本的《有机化学》教科书和著作中，甚至在同一本《有机化学》教科书中［１］，氢化铝锂（ＬｉＡｌＨ４）或硼氢化钠（ＮａＢＨ４）还原醛、酮成醇的反应式有两种不...     

溶剂与温度对立体选择性还原制备光活性莰胺的影响

溶剂与温度对立体选择性还原制备光活性莰胺的影响凌云，杨新玲，刘尚钟（北京农业大学应用化学系，１０００９４）不对称合成已成为近几年来有机化学工作者研究的热点，光活性的有机化合物，在生物化学、医药、农药等方面的具体应用日益占有重要地位。通过不对称合成是制...     

十二烷基硫酸根复合物的制备及电子转移催化剂应用

制备了三种聚烷基紫精-十二烷基硫酸根复合物(PRV-LS), 用紫外光谱、顺磁共振波谱研究了复合物的氧化、还原行为, 将复合物用作电子转移催化剂于异相体系(CH2Cl2-H2O; 1:1, 20mL)考察了其透导的偶氮苯还原。结果表明: 复合物在异相条件被还原时, 聚烷基紫精自由基(PRV^+)在LS成份的作用下发生相转移, 复合物具有良好的诱导偶氮苯还原的能力。