| 查看: 244 | 回复: 2 | |||
| 当前主题已经存档。 | |||
[交流]
Fluorenscence 和 Luminescence
|
|||
| 大家知不知道Fluorenscence 和 Luminescence之间的区别? |
» 猜你喜欢
366求调剂
已经有9人回复
材料工程085601,270求调剂
已经有37人回复
279学硕食品专业求调剂院校
已经有18人回复
290调剂生物0860
已经有31人回复
一志愿085802 323分求调剂
已经有13人回复
277求调剂
已经有23人回复
322求调剂,08工科
已经有4人回复
材料工程281还有调剂机会吗
已经有30人回复
化学070300 求调剂
已经有16人回复
化工学硕294分,求导师收留
已经有12人回复
bern
铁杆木虫 (著名写手)
- 应助: 6 (幼儿园)
- 金币: 9060.8
- 散金: 98
- 红花: 1
- 帖子: 1222
- 在线: 286.7小时
- 虫号: 329722
- 注册: 2007-03-23
- 专业: 电化学
★ ★
hzsch-1978(金币+2):谢谢你热心的虫友啊!
hzsch-1978(金币+2):谢谢你热心的虫友啊!
|
Fluorenscence是荧光 Luminescence 是磷光 区别是分子吸收光子后由激发态返回基态时跃迁的路径不一样。 荧光:10-7~10 -9 s,第一激发单重态的最低振动能级→基态; 磷光:10-4~10s;第一激发三重态的最低振动能级→基态; 荧光发射:电子由第一激发单重态的最低振动能级→基态( 多为 S1→ S0跃迁),发射波长为 ‘2的荧光; 10-7~10 -9 s 。 磷光发射:电子由第一激发三重态的最低振动能级→基态( T1 → S0跃迁); 电子由S0进入T1的可能过程:( S0 → T1禁阻跃迁) S0 →激发→振动弛豫→内转移→系间跨越→振动弛豫→ T1 发光速度很慢: 10-4~100 s 。 光照停止后,可持续一段时间。 给你一个ppt,里面介绍的比较多。 |
2楼2007-05-02 11:08:25
Luminescence
|
Luminescence is light not generated by high temperatures alone. It is different from incandescence, in that it usually occurs at low temperatures and is thus a form of cold body radiation. It can be caused by, for example, chemical reactions, electrical energy, subatomic motions, or stress on a crystal. The following kinds of luminescence are known: Chemoluminescence Bioluminescence Crystalloluminescence Electroluminescence Cathodoluminescence Mechanoluminescence Triboluminescence Fractoluminescence Piezoluminescence Photoluminescence Phosphorescence Fluorescence Radioluminescence Sonoluminescence Thermoluminescence Historically, radioactivity was first thought of as a form of "radioluminescence", although it is today considered to be separate since it involves more than electromagnetic radiation. The process of coating dials, hands, scales and signs on, particularly, aviation and navigational instruments and markings with luminescent materials is known as luminising. [ Last edited by ddjyg on 2007-5-2 at 13:06 ] |
3楼2007-05-02 13:01:57













回复此楼