What is fluorescence and how does it arise?

  • Thread starter Thread starter retupmoc
  • Start date Start date
  • Tags Tags
    Fluorescence
Click For Summary
SUMMARY

Fluorescence occurs when a molecule absorbs light at a specific frequency, exciting its electrons from a ground state to an excited state. Upon returning to the ground state, these electrons release energy primarily through photon emission. The structure of fluorescent compounds is typically rigid, limiting vibrational energy loss, which results in a longer wavelength of emitted light compared to the absorbed light. This phenomenon is crucial in various applications, including fluorescence microscopy and biochemical assays.

PREREQUISITES
  • Understanding of molecular excitation and electron transitions
  • Familiarity with photon emission and energy loss mechanisms
  • Knowledge of fluorescence microscopy techniques
  • Basic principles of light absorption and wavelength shifts
NEXT STEPS
  • Research the mechanisms of energy loss in fluorescent compounds
  • Explore applications of fluorescence in biochemical assays
  • Learn about fluorescence microscopy and its techniques
  • Investigate the relationship between molecular structure and fluorescence efficiency
USEFUL FOR

Chemistry students, researchers in biochemistry, and professionals in fields utilizing fluorescence techniques will benefit from this discussion.

retupmoc
Messages
47
Reaction score
0
What is fluorescence and how does it arise?

Is it just a spontneous de-excitation after the electron in the molecule (protein) has been excited. This is a 6 mark question in last years Chemistry-2 exam and i don't really know how to go about answering it. Any suggestions?
 
Chemistry news on Phys.org
Fluorescence arises when a molecule absorbs light of a certain frequency, which brings electrons from a ground to an excited state. These excited electrons can fall back to their ground state by the loss of energy. There are several ways by which this energy can be lost, like through vibrational energy. Fluorescent compounds have very rigid structures though, so they are unable to vibrate and the electron returns to the ground state through the emittion of a photon. Some of the energy of the photon will already have been lost, so the wavelength has changed to a longer one.
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
Replies
1
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 16 ·
Replies
16
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 16 ·
Replies
16
Views
6K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K