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Relevant particulars on the CSIR Research Scheme,NEHU,Chemistry


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                                       TITLE  OF  THE PROJECT
 
 SHIELDING PARAMETERS OF NUCLEI: FACILITIES  FOR  THE EXPERIMENTAL DETERMINATION AND CALCULATION BYTHEORETICAL PROCEDURES-TO OBTAIN INFORMATION ON CRYSTAL STRUCTURES AND MOLECULAR ELECTRONIC STRUCTURES
 
The experimental part of the project is the construction of a Magic Angle Sample Spinning accessory to the AC 300 High Resoltion (solution) Spectrometer. It wpould be possible to obtain solution-like spectra from the POWDER specimens by spinning the sample about an axis at Magic Angle to the applied field direction. Illustration below: 

Providing a MASS accessory to AC 300 for powders
mass13c.jpg
A typical MASS 13c Spectra- STATIC & SPINNING
The Magic Angle Sample Spinning (MASS) accessory can be made available in the HR liquid state spectrometers simply by providing a suitable probe without having to change the Transmitter-receiver part of the spectrometer to the High Power solid state NMR spectrometer models. This enables obtaining MASS spectra for a variety of the nuclei as is available in a Multi-nuclear liquid state HR NMR(AC 300) spectrometers. To obtain better sensitivity for the less abundant nuclei,the MASS spectra are obtained usually with additional  sensitivity enhancement by the solid-state 'cross-polarisation' (CP) techniques and such experiments are known as CPMASS  experiments. But, adding this feature for CP techniques would require escalating the spectrometer specifications to that of SOLID-STATE NMR models which is not as simple as providing a simple probe assembly only.
 
The Calculation aspects of the Shielding parameters with emphasis on the efforts made by the Principal Investigator (PI) till now are compiled in the webpages of a Website: for accessing the website describing the outline of the research profile of Dr.S.Aravamudhan,Principal Investigator in the Project,bring the cursor on to the 'click here' line below this text and click. 

A website which is intended to be more brodbased , frequently updated with the current trends and on-going activities would be at the URL: http://saravamudhan.tripod.com/

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