| 查看: 322 | 回复: 1 | ||
[求助]
想请教一下关于自选多重度守恒的概念
|
|
什么是spin exciting呢？这段话应该怎么理解，是什么个意思呢？非常感谢高手的帮助，期待你们的交流。这段话如下：Molecular oxygen is spin triplet in its ground state, and the lowest two unfilled orbitals are a pair of minority orbitals that are antibonding in nature. The most likely reaction product with small aluminum clusters is AlO2-, which has a spin singlet ground state, although larger sizes are likely to produce small Aln- and neutral oxides. Furthermore, reactivity requires the filling of the minority LUMOs in 3O2. The filling of theseorbitals may be thought of as a spin multiplicity 3-1 excitation of the oxygen half of the complex and could be facilitated by spin orbit coupling. However, aluminum and oxygen have negligible spin orbit effects such that reactions should follow the Wigner Witmer rules of spin conservation.Therefore, the reaction has to conserve the overall spin of the system. For clusters with an odd number of electrons, the spin of the extra electron could align opposite to the majority spin electrons ofthe 3O2 molecule, and the spin conservation does not require any spin excitation of the metal counterpart. The situation is different for clusters with an even number of electrons since the decrease in the spin multiplicity of the oxygen half of the reacting cluster has to follow the spin excitation of the remaining portion to conserve the total spin. Consequently, the ability of3O2 the cluster to become spin excited to accommodate the triplet spin of oxygen must play a role in reactivity. |
回复此楼» 猜你喜欢
夏威夷大学生物胶体与界面实验室诚招全奖博士生和博士后
已经有1人回复
-
已知面上挂了，小学校实验方向无平台，感觉太难了
已经有26人回复
-
物理化学论文润色/翻译怎么收费?
已经有248人回复
-
求助立方晶体In(OH)3的CIF卡片
已经有2人回复
-
求助各位大佬，球球了，在这科萨头
已经有0人回复
-
请问四氢呋喃溶解的聚合物用甲醇沉淀时，如何使沉淀过程加速？
已经有2人回复
-
[电子教材]天津大学物理化学（第七版）上、下册
已经有1人回复
-
阴离子交换膜电解二氧化碳还原
已经有0人回复
-
Chemical Bonding at Surfaces and Interfaces,最经典的一本表面上化学相互作用教材
已经有0人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 跨专业考到药学院校，想自学药学基础的课程，应该怎么入手？
已经有13人回复
- 化学工程与工艺专业本科求职，想往电池方向发展，求建议
已经有11人回复
- 关于粉料+液体混合的一些问题请教
已经有9人回复
- 【求助】敢问运动的相对性对应的守恒量是什么呀
已经有5人回复
- 一篇关于角动量守恒实验改进的论文想投到国外，求助什么期刊能接受
已经有5人回复
- 【求助】请教关于时空sobolev空间这个概念
已经有3人回复
- 请教一下，有关统计图表的概念
已经有9人回复
 |
2楼2011-10-09 15:26:21