铱(III)光敏剂受光激发后经系间穿越(intersystem crossing, ISC)达到激发三线态(triplet excited state),随后经能量转移(energytransfer, EnT)将底物1a激发。激发态的底物1a*与卡宾催化醛现场生成的Breslow烯醇负离子中间体发生单电子转移...
Covalent bonds between the 3rd Period non-metals are generally weaker than the bonds between atoms of their 2nd period neighbours Si-Si bonds are expected to be weaker than C-C bonds Their bond strength should be lass than 300kJ mol^(-1) (b) The hardne
THE value of the energy of the central C-C bond in diphenyl (that is, the heat of dissociation of the molecule into two radicals (or atoms) formed by the fission of this bond) is of considerable interest. The difference between the energy of this bond and the energy involved in the C...
对其爆轰性能和感度等性能参数进行理论计算或测试发现,新合成的稠环化合物爆轰性能优异且感度低,这些发现为 C–N 键切断反应及稠环化合物的合成提供了新思路。 该研究成果以“Radical-mediated C–N Bond Activation in 3,5-Diamino-...
The molecular structures and energies of hydrocarbons containing very short nominally single C–C bonds were calculated by high-level ab initio calculations. The 'squeeze energies' (SqEs) pertaining to the shortening of central C–C bonds are found to correlate very well with central short C–C...
Invests its assets in investment grade rated bonds and maintains an average portfolio duration that is within +/- 20% of the duration of its benchmark, the Bloomberg Barclays U.S. Aggregate Bond Index.
Invests in two strategies, approximately equally. One strategy focuses on commodity-linked derivatives, the other focuses on equity investments in commodity-related companies, including mining, energy and agricultural companies.
中欧绿色能源装备及技术展览会同期还将举办“Hy-fcell德国国际氢能和燃料电池展”、“Motek生产和装配自动化展”，“Bondexpo材料连接技术展”等相关展会。展品范围：一、太阳能、晶硅光伏产业链 1、上游材料：硅料、硅锭、硅棒、硅片；封装玻璃；封装薄膜；其他原料；2、太阳能电池及组件：单晶电池及组件；多晶...
conservation of energy 能量守恒conservation of nature 自然保护consistance 稠度consistency 稠度consistency index 稠度指数consistency test of concrete 混凝土稠度试验consistometer 稠度计console 伸臂consolidation 压实consolidation grouting 固结灌浆consolidation settlement 固结沉降consolidation test 固结试验consolidation test ...
中欧绿色能源装备及技术展览会同期还将举办“Hy-fcell德国国际氢能和燃料电池展”、“Motek生产和装配自动化展”,“Bondexpo材料连接技术展”等相关展会。 展品范围: 一、太阳能、晶硅光伏产业链 1、上游材料: 硅料、硅锭、硅棒、硅片;封装玻璃;封装薄膜;其他原料;...