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NMR spectroscopy

Spectroscopy deals with the interactions
between electromagnetic radiation and matter.
How the matter is influenced depends on the
wavelength or frequency of the radiation.
Scientists use spectroscopy to derive the
properties of matter at the molecular level.
Nuclear magnetic resonance (NMR) is a special
branch of spectroscopy, exploiting the magnetic
properties of atomic nuclei. NMR was discovered
1945 in USA by Bloch and Purcell
(Nobel Prize in physics 1952).


Reminiscences of the Early Days of Nuclear Magnetic Resonance at Stanford University by Warren G. Proctor, Research Laboratory,Varian AG, written around 1967.

Bloch and Purcell discovered NMR which
was observed by a Continuous RF Irradiation
of Spin System in a Magnetic Field while
ERWIN HAHN demonstrated the Pulsed Transient NMR Response of Spin System with home-built Pulsed NMR Spectrometer.
Experiments of E. L. Hahn have been described
in this article

of the Nobel Prize Laureates:
Michigan State University 900 MHz NMR Facility


By the author
List of references cited in NMR book
Introducing NMR in Schools & Colleges
List of items related to NMR book

Links below: For Some applications of M.R.S.
Magnetic Resonance Spectroscopy

1.(a)  Aromatic Ring Current Shifts

1.(b)  QM Chemical Shift Calculations/Ring Current-Induced Field

2.  Metabolomics And Their Utility
for Environment

3.  Advanced Oxidation Processes

4.  Small molecule Computational Chemistry
Related to Macromolecular Computations

5.  NMR for oil and coal

6.  Related to plant biology

7.  On Reaching Out to Public with Metabolomics

8.  Charles P. Slichter-Early Days studies/Solid State NMR

9.  Ulrich Haeberlen-The Early Days of Multiple Pulse NMR

Web Page created on 25th September 2016 at Shillong                Last updated on..20th March.2017..Shillong
Hit counter below was set to zero on 25th September 2016

PowerPoint Presentation Files for
INTRODUCING Nuclear Magnetic Resonance: in Schools & Colleges
From the contents of  webdirectory  of S Aravamudhan

This part added on to this page on 7th Oct.2016 at Shillong
Make a beginning with self learning in Information and Communication Technology tools with specific reference to teaching of Chemistry and spectroscopy:
  A Webpage to begin with I.C.T:-  IT-Classroom-Tools
And, eventually find yourself publishimg on educational technology !
An excerpt from the article(cited as hotlink below):
Most of such facilities have come about by thinking innovatively in bringing science and technology to the door steps of common people, and innovative thinking is about how to put the information technology into effective use than making available these I.T. tools for fissiparous trends. While learning to use the IT tools, it should be ensured, that it is by a responsible training, not by obtrusive and wasteful trends and tendencies - even if it is self-learning. A certain level of maturity (not merely a qualification of experience) is required to minimize the dissipation and conserve the resources, reduce the wear-and-tear damages and insist on durability and dependability. Some instances would require local wisdom, more than broad based information and knowledge of the subject matter.
A publication could come through during the Chennai Visit (for the particpation in 10th Midyear CRSI Symposium,Trichy, July 23-25,205: the next event EVENT-07) to elaborate on this observation as above:-

Click HERE to view the original .pdf version of the above .jpg image of the Certificate
A hotlink reference to the article published in the ejournal IJRDET:-

             01 Introduction: Single Spin Angular Momentum

             02 Spin Precession - Spin Ensemble

             03 Enesmble Magnetization Relaxation T1 & T2

             04 Detection Princples; spectrum
        ON Continuous Wave (CW) Method &
        Pulsed Transient Responses (Pulsed NMR)

             05 Instrumentation; nmr Spectrometer
            A hot link for:  Emerging Trends
            A review article on:-> Elements of NMR Instrumentation
             06 Transition Rates; Relaxation Times; CW & Pulse technique

             07 Transition Rates; Relaxation Times;
             Determining Optimal Factors for CW or Pulse methods
             article  on experiments on observation of Pulsed NMR
             08 FTNMR-1

             09 FTNMR-2

             10 FTNMR-movie

             11 Terminology; Magnetism descriptions

             12 Onehour Lecture; Pulsed NMR
Below is the link to NMR Vidoes Playlist at YOUTUBE.COM
This add-on information pertains to the PPT files "03 Enesmble Magnetization Relaxation T1 & T2";"04 Detection Princples; spectrum" and "07 Transition Rates; Relaxation Times; CW & Pulse technique" . The spin-lattice relaxation process involves an exchange of energy between the Spin system (spin degrees of freedom) and the lattice (other degrees of freedom than the spins). Which means when the Spin absorbs energy from radiation due to resonance, there is an increase in spin system energy due to the energy absorbed from Electromagnetic Radiation. Then spin system equilibrates with lattic, the lattice would get more energy dissipated from the spin system. This can manifest as an increase in the temperature os the sample, and the following observation by George Feher is precisely on such considerations:
          Observation of EPR lines using temperature modulation;--by--
          G. Feher, R.A. Isaacson, and J.D. McElroy; --in--
          Rev. Sci. Instr. 40, #12, 1640-1641 (December 1969).

Possible self-learning exercises with MS OFFICE application; on the basic aspects of Obtaining NMR spectra
Video feature added on 1st May 2017: Shillong

Alternate link for the above e-book:
Author's PREFACE to the book
Teaching & Research: S.Aravamudhan

author: Sankarampadi Aravamudhan

A hotlink to  the book store catalogue 
A hotlink to a  poster  poster on the book

author: Sankarampadi Aravamudhan