Transcription of Module 1 (Molecular Spectroscopy) Lecture 1 Date
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Module 1 (Molecular Spectroscopy) Lecture 1 Date
Module 1 (Molecular spectroscopy ) Lecture 1 Date: Energy levels in a molecule A molecule has 4 types of energy levels 1. Electronic Energy levels. The energy associated with distribution of electrons in a molecule (bonding and antibonding orbitals). It is quantized, means it can have only certain discrete values. The energy gap between these levels falls in UV-visible region. 2. Vibrational Energy levels. The bonds in a molecule always vibrate (stretch or bend). Here during vibration the centre of gravity remains constant while the position of atoms changes. The energy associated with vibrational motion is vibrational energy. It is also quantized. The energy gap between two adjacent vibrational energy levels falls in IR region. 3. Rotational Energy levels.
Fluorescence spectroscopy, Phosphorescence spectroscopy . Beer Lamberts Law When a monochromatic light is passed through a dye solution, the absorbance is proportional to product of concentration and thickness of solution. A= c t [ is molar absorptivity, c is concentration and t is thickness of solution. ...
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