In the previous post, we concluded the discussion on the Franck-Codon principle, which stated that the molecule’s geometry does not change during an electronic transition.
Tag: Physical Chemistry
178. ABSORPTION OF RADIATION(9) – FRANCK -CODON PRINCIPLE(3).
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
177. ABSORPTION OF RADIATION(8) – FRANCK -CODON PRINCIPLE(2).
In the previous post, we wondered – DOES CHANGE IN THE ELECTRONIC LEVELS BRING ABOUT CHANGE IN THE VIBRATIONAL ENERGY LEVELS TOO? In this post,
174. ABSORPTION OF RADIATION(5) – MORSE POTENTIAL
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
173. ABSORPTION OF RADIATION(4) – BY MOLECULES.
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.
172. ABSORPTION OF RADIATION(3) – BY MOLECULES.
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
171. ABSORPTION OF RADIATION(2) – BY ATOMS.
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
169. PRIMARY AND SECONDARY PROCESSES.
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
168. QUANTUM YIELD
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.
167. LAWS OF PHOTOCHEMISTRY (13)
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
166. LAWS OF PHOTOCHEMISTRY (12) – PHOTONS.
A post on photons and rest mass.
165. LAWS OF PHOTOCHEMISTRY (11).
1.The molar absorptivity of a conjugated diene (molecular mass = 110 g/dm3) is 13.100.Calculate the concentration of this diene in a solvent, which is required