In the previous post, we studied the Franck-Codon principle, which states that an electronic transition takes place so rapidly, that a vibrating molecule does not
In the previous post, we wondered – DOES CHANGE IN THE ELECTRONIC LEVELS BRING ABOUT CHANGE IN THE VIBRATIONAL ENERGY LEVELS TOO? In this post,
Understanding the molecular vibrations is very interesting. To locate the molecule in space, we need to predict its behavior. When we try to find the
After learning the concept of Morse’s potential in the last post, let us start this post by getting to know the man behind this concept
We concluded the last post by stating that molecules are anharmonic oscillators. In an anharmonic oscillator, the restoring force(F) is no longer proportional to the
In the last post, we concluded that only the vibrational and electronic energy of molecules, need to be considered while constructing a molecular energy diagram.
From this post onwards, we begin discussing the absorption of radiation by molecules in detail. In post 170, we discussed how absorption by atoms and
In the previous post, we learned why energy level diagrams in atoms and molecules are different. We can summarize the post by concluding that, in
From this post onwards, we are going to study the most fundamental part of photochemistry – the absorption of radiation by atoms and molecules. What
We studied in the earlier posts that the Stark-Einstein law holds true only for the primary process of a photochemical reaction. However, we never studied
In the last post, we started talking about quantum yield. This quantity tells us how many molecules react by absorbing how many quanta of light.
In this post, we will start discussing the second law of photochemistry, namely the STARK -EINSTEIN LAW. STARK- EINSTEIN LAW This law was formulated by