作者qwerwef5535 (海鮮)
看板Chemistry
標題[學科] Jablonski Diagram解釋分子軌道的轉移?
時間Tue May 8 10:36:24 2018
各位版友安安
想請問Jablonski Diagram常被用來解釋各種state的轉移
那能否解釋MO間電子雲的轉移
例如S2→S1可以經由Internal conversion來達成
那能否說LUMO+1→LUMO也可能是經由Internal conversion來達成呢?
我知道各個state是由各分子軌道的線性組合出來
既然state間可以用Jablonski Diagram來解釋那MO間可以這樣解釋嗎?
謝謝
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 36.238.112.170
※ 文章網址: https://webptt.com/m.aspx?n=bbs/Chemistry/M.1525746988.A.E9F.html
1F:→ kkarthur: 真的了解了Jablonski Diagram和MO就不會有這樣的問題了 05/08 12:13
2F:→ kkarthur: 一個是state,最直接的就是從光譜上測定而來 05/08 12:17
3F:→ kkarthur: 一個是計算出來近似的orbital 05/08 12:18
4F:→ kkarthur: 兩者要真能對照準確,還有一大段路要走 05/08 12:21
5F:推 KBmax: first, you should realize that Jablonski diagram has co 05/12 19:45
6F:→ KBmax: nsidered the effect from the nucleus coordinate (i.e. p 05/12 19:45
7F:→ KBmax: honon), so there presents a potential energy surface, a 05/12 19:45
8F:→ KBmax: nd the transition between S1 and S2 can be taken as a b 05/12 19:45
9F:→ KBmax: aby diagram 05/12 19:45
10F:推 KBmax: However, the MO is an orbital; it's not visible and is 05/12 19:50
11F:→ KBmax: a function of single electron coordinates. The trans 05/12 19:50
12F:→ KBmax: ition from one MO to another MO in one MO diagram doesn 05/12 19:50
13F:→ KBmax: 't take the change of nuclear coordinate in. 05/12 19:50
14F:推 KBmax: So I mean the two concepts are quite different 05/12 19:55
15F:→ faniour: State 是各個MO的分布總和 05/13 13:47
16F:推 sunev: 樓上講法有問題 05/13 14:53
17F:→ faniour: 幫忙修正吧 05/13 16:27
18F:推 sunev: MO只代表slater determinant,state是slater determinant的 05/13 18:44
19F:→ sunev: 組合 05/13 18:44
20F:推 KBmax: 一般我們畫MO是single electron orbital吧,不然你用slater 05/14 15:27
21F:→ KBmax: determinant算出來的wave function 是多電子的坐標的函數 05/14 15:27
22F:→ KBmax: 根本不可能在三維空間畫出來啊 05/14 15:27
23F:推 KBmax: 所謂的HOMO LUMO都是single electron 的picture,作完slate 05/14 15:31
24F:→ KBmax: r determinant代表是整個分子的一個electron configuration 05/14 15:31
25F:→ KBmax: wave function,一般分子體系可能需要考慮到multi -config 05/14 15:31
26F:→ KBmax: uration 所以會再把slater det作線性組合,得到一個spin co 05/14 15:31
27F:→ KBmax: ntaminent的total wave function,也就是一個分子體系在Bor 05/14 15:31
28F:→ KBmax: n Oppenheimer approx底下,某個nuclei coordinate的electr 05/14 15:31
29F:→ KBmax: onic eigenstate 05/14 15:31
30F:推 KBmax: 更正:spin contaminent 改為spin adapted 05/14 15:34