Question

write down the types of molecular spectroscopy.​

Answer 1

Answer:

There are many different types of spectroscopy, but the most common types used for chemical analysis includes atomic spectroscopy, ultraviolet and visible spectroscopy, infrared spectroscopy, Raman spectroscopy and nuclear magnetic resonance.

Answer 2

$\textbf {\pink{Molecular\:spectroscopy\:and\:its\:types-}}$

✓ If interaction occurs with the molecules of the compounds it is called $\textbf {\blue{molecular\:spectroscopy.}}$

$\textbf {Types\:of\:Molecular\:spectroscopy-}$

• $\textbf {Microwave\: (Pure\:rotational\:spectroscopy}$

• $\textbf {Vibrational\:spectroscopy}$

• $\textbf {Electronic\:spectroscopy}$

• $\textbf {Raman\:spectroscopy}$

• $\textbf {NMR\:spectroscopy}$

• $\textbf {ESR\:spectroscopy}$

$\textbf {\purple{Microwave\: (Pure\: rotational\:spectroscopy-}}$

When interaction of electromagnetic radiation occurs with the molecule and transition takes place between the rotational energy level, then spectra arises it is called Pure Rotational Spectra. Such spectra arises in microwave region

$(10^{-2} to 10^{-4} m)</p><p></p><p>$.

$\textbf {\purple{Vibrational\:spectroscopy-}}$

• This type of spectroscopy arises due to transition in vibrational energy level in vibrational region $(10^{-6} to 10^{-8}m)</li><li>$. In vibrantional spectra, there is also transitions in rotational energy level. That is why, such spectra is also called Rotational-Vibrational Spectra.

$\textbf {\purple{Electronic\:Spectroscopy-}}$

• This type of spectroscopy arises due to transition in different electronic energy level. There is also transition in rotational as well as vibrational energy level. Hence, such spectra is complex spectra. It is also called Rotational-Vibrational electronic spectra. It arises in UV-region $(10^{-6} to 10^{-9}m)$.

$\textbf {\purple{Raman\:Spectroscopy-}}$

• In Raman spectroscopy instead of absorption of electromagnetic radiation, scattering of radiation is measured in vibrational region $almost 10^{-4} to 10^{-8}$.

$\textbf {\purple{NMR\:Spectroscopy-}}$

• Such spectroscopy arises due to transition in nuclear energy level in radiowave region (50-60 mHz) presence of external magnetic field.

$\textbf {\purple{ESR\:Spectroscopy-}}$

• Such spectroscopy arises due to transition in spin energy levels in radiowave region ( 2 to 9.6 GHz ) in external magnetic field.

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