A molecule that has absorbed a photon of light in the visible region could move from the lowest vibrational level of an excited electronic state (S₁) to a highly excited vibrational level of the ground state (S₀), with the same energy, is termed what?- A. Intersystem conversion- B. Intersystem crossing- C. Internal Conversion- D. Internal Crossing- E. Vibrational relaxation- F. Fluorescence

Photochemistry is the branch of chemistry that concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet, visible light or infrared radiation. In the given question, it has been asked to define the process occurs during photochemical reaction.Correct option is C. internal conversion Explanation: Internal conversion is a transition from lowest vibrational level of an excited state to highly excited vibrational level of ground state. It is called "radiationless de-excitation", because no photons are emitted. It differs from intersystem crossing In the intersystem crossing (ISC), molecule changes its spin state. It changes its spin state from singlet to triplet. Hence other options are incorrect.

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A molecule that has absorbed a photon of light in the visible region could move from the lowest vibrational level of an excited electronic state (S₁) to a highly excited vibrational level of the ground state (So), with the same energy, is termed what? A. Intersystem conversion B. Intersystem crossing C. Internal Conversion D. Internal Crossing E. Vibrational relaxation F. Flourescence

A molecule that has absorbed a photon of light in the visible region could move from the lowest vibrational level of an excited electronic state (S₁) to a highly excited vibrational level of the ground state (So), with the same energy, is termed what? A. Intersystem conversion B. Intersystem crossing C. Internal Conversion D. Internal Crossing E. Vibrational relaxation F. Flourescence

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter14: Rotational And Vibrational Spectroscopy

Section: Chapter Questions

Problem 14.24E: Which of the following molecules should have pure rotational spectra? a Dimethyltriacetylene,...

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