版主新文里关于荧光说的不确

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送交者: whoami 于 2007-11-16, 20:24:32:

“荧光增白剂能吸收波长为300－400纳米的紫外光线，使分子进
入激发态，激发态分子回到能量较低的基态时，多余的能量幅射
出来，发出荧光。在这一过程中能量减少了，发出来的荧光的波
长也变长了，大约是450纳米，。”

“较低的基态”的说法不妥，基态就一个。应当是在回到基态前
先到了某个中间的亚稳态，使得吸收能量的一部分变成了振动即
热能，由于这一损失，发射光波长比入射光长。

所有跟贴:

挑错不是这么挑的。 - whatistrue (564 bytes) 2007-11-17, 16:14:25 (183828)
- 基态是一个重要的物理概念! - bluesky007 (69 bytes) 2007-11-17, 22:45:55 (183893)
能量较低的基态 - feelslikespring (180 bytes) 2007-11-17, 15:22:10 (183816)
- 这样的话后面的“能量减少了”就不清楚了。 (无内容) - whoami (0 bytes) 2007-11-17, 15:49:04 (183820)
这刺挑的不好 - Yush (476 bytes) 2007-11-17, 12:07:10 (183778)
- Thank Yush, 我还真没有认真读过国内学术期刊的学术文章! - bluesky007 (120 bytes) 2007-11-17, 23:03:46 (183894)
较低当然是基态和激发态相比 - eng (22 bytes) 2007-11-17, 11:03:00 (183763)
- what i wante to say is that the energy loss wasn't mensioned clearly (无内容) - whoami (0 bytes) 2007-11-17, 12:29:34 (183784)
  - He did mention there is energy loss during the process. - feelslikespring (92 bytes) 2007-11-17, 20:10:19 (183874)
基态: 能量最小的状态 - bluesky007 (42 bytes) 2007-11-17, 08:26:42 (183735)
- 不会吧？ - sangdy (100 bytes) 2007-11-17, 08:33:35 (183738)
  - 文科＋外行话 - bluesky007 (62 bytes) 2007-11-17, 10:19:24 (183752)
    - 惭愧 - sangdy (464 bytes) 2007-11-17, 10:53:26 (183756)
      - 激发态和基态的能量进行比较. 没有意义! - bluesky007 (34 bytes) 2007-11-17, 22:36:58 (183892)
  - In physics, it is a big problem! - bluesky007 (60 bytes) 2007-11-17, 09:55:04 (183746)
    - so what is your major then, physics? - sangdy (74 bytes) 2007-11-17, 10:55:48 (183760)
      - Yes. Thanks! (无内容) - bluesky007 (0 bytes) 2007-11-17, 23:10:26 (183895)
- "ground state, which has lower energy level" or "ground state with lower energy" - JZ (28 bytes) 2007-11-17, 08:31:14 (183737)
  - ... ground state in lower energy level... (无内容) - sangdy (0 bytes) 2007-11-17, 08:36:42 (183740)
    - Meaningless to say "ground state, which has lower energy, ..." - bluesky007 (276 bytes) 2007-11-17, 10:11:29 (183749)
      - 舟子写的是科普文章，读者并不都知道基态的定义 (无内容) - JZ (0 bytes) 2007-11-17, 10:15:34 (183751)
        
        Whatever you do, you should give the correct information! (无内容) - bluesky007 (0 bytes) 2007-11-17, 10:22:16 (183753)
        
        you are definitely right, knod. (无内容) - sangdy (0 bytes) 2007-11-17, 10:57:09 (183761)
好像没什么不妥吧？ - sangdy (41 bytes) 2007-11-16, 21:44:44 (183705)
- 我理解原文不是这意思，而是想说明荧光现象。 (无内容) - whoami (0 bytes) 2007-11-16, 22:14:21 (183714)
  - 你的说法也有错误 - feelslikespring (170 bytes) 2007-11-17, 15:32:20 (183818)
    - Not really - whoami (66 bytes) 2007-11-17, 16:04:29 (183823)
      - Whatistrue 说的更专业准确一些。 - feelslikespring (188 bytes) 2007-11-17, 20:04:21 (183873)
        
        准确地说, 光的吸收和发射与电子从初始态跃迁到终态有关 - bluesky007 (758 bytes) 2007-11-18, 00:18:04 (183897)
That is right! (无内容) - bluesky007 (0 bytes) 2007-11-16, 21:37:59 (183704)

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