What is jablonski diagram?

The Jablonski diagram is a graphical representation of the electronic transitions that occur in a molecule or atom. It illustrates the processes of absorption, emission, and non-radiative relaxation of energy states.

The vertical axis of the diagram represents the energy levels of the electronic states, while the horizontal axis represents the different pathways that a molecule can take during electronic transitions.

There are several key features of the Jablonski diagram, including:

1. Absorption: When a molecule absorbs a photon of light, it transitions from a lower energy electronic state to a higher energy electronic state. This is represented by an upward arrow on the Jablonski diagram.

2. Emission: When a molecule emits a photon of light, it transitions from a higher energy electronic state to a lower energy electronic state. This is represented by a downward arrow on the Jablonski diagram.

3. Non-radiative relaxation: In some cases, a molecule can undergo non-radiative relaxation, where energy is dissipated as heat rather than emitted as a photon. This process is represented by a squiggly line on the Jablonski diagram.

Overall, the Jablonski diagram is a useful tool for understanding the complex processes of electronic transitions in molecules and atoms. It helps to visualize the different pathways that energy can take during these transitions and provides insight into the mechanisms of fluorescence, phosphorescence, and other photophysical processes.