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IR spectroscopy - Coggle Diagram
IR spectroscopy
Fundamental modes of vibrations
Stretching Vibrations
Symmetric stretching vibration
Asymmetric stretching vibration
Bending Vibrations
Scissoring
Rocking
Wagging
Twisting
Translational energy
Rotational frequencies
Vibrational energy
Factors affecting vibration
Coupled interaction
Hydrogen bonding
Fermi resonance
Electronic effect
Instrumentation
Monochromator
Prisms
Grating
Sample cell handling
Solid dissolved in solvent
Solid dissolved in solvent
As solid film
Mull technique
Pressed pellet technique
Sampling of liquid
Samoling of gases
Detector
Golay cell
Bolometer
Thermister
Pyroelectric detector
Thermocouple detector
Source of radiation
Nernst glower
Nichrome wire
Globar
Rhodium wire
Tungsten Filament Lamp
Principle
Vibrational frequence(v)
Selection rule:
Absorption of correct wavelength of radiation
Dipole moment
Overtones
Application
Qualitative analysis
Indentification of organic compound
Distinction between two type of hydrogen bonding
Structure determination
Quantitative analysis
Study of chemical reaction
Study of keto enol tautomerism
Introduction
Infrared region:- beyond red ( 12800 - 10cm‐¹)
Far infrared (400 - 10cm‐¹)
Mid infrared ( 400 - 400cm‐¹)
Near infrared ( 14000-400cm‐¹)