Guiding Ph. D. Student


If this is your first time visit to this site then start reading from the first post (bottom)

Update on 1st Sept, 2015

One Phd student joined in this semester. Not planning to take any PhD student before 2017. However, someone visit me and convince me then I might consider one more in 2016.

Update on 10th May 2015

Most likely to take one student. Show your interest in Inorganic Chemistry during interview. If you get selected and you want to work with me, that’s all is needed. As such I have not given word to anyone and want to avoid a situation where more than one is willing to join with me. So contact me before interview and if necessary I can discuss with you to select another guide.

From the way the results are emerging from M.Sc. projects and summer project, the sub-micron polymer project and Ferrocene<-->nano/sub-micron magnet seems to be the two which has better potential to success. So these two are more likely to be continued.

Briefs:

  • Synthesis and characterization of Micron to sub-micron sized functional polymer and feasibility testing for their application. Previously we explored such material briefly (Journal of Applied polymer Science, 2008, 1158.) but did not follow up further. Recently we found that some of those materials have excellent chromium removal property much better than what we have observed before(Journal of Hazardous Materials, 2007, 143, 24). It seems we can control the physical properties by using mixture of solvent and controlling the reaction conditions. Functionalization tests will be next. Instrumental facilities being used or to be used: AAS, DLS, BET Isotherm/ Surface Area, TGA/DSC, SEM, FTIR, NMR, UV-Vis.

MRayPoly4Water50xpolymer4_1164
Images recorded with microscope (left) and FE-SEM (right). We can make multi gram of this within 2-3 day.


  • Synthesis of micron to sub-micron sized magnetic particle and see if we can coat these with functionalized polymer or can put functional groups on the surface of the magnets. Several ferrocene derived ligands including difficult to get aspartic acid derivative. First stage will be normal coordination chemistry ie. synthesis, characterization and electrochemistry. Next stage is the metal-hydroxy cluster formation and magnets (we already can do it but further control needed). Magnetic particles have to be smaller so that it floats better. Right now it does not stay floated for long duration. Instrumental facilities being used or to be used: CD, Powder X-ray, DLS, Magnetism (better facility required), BET Isotherm/ Surface Area, TGA/DSC, Electrochemistry, SEM, FTIR, NMR and UV-vis.

schematic
This is how we do it?

In both project, emphasize is making things simply and efficiently without diluting the underlying chemistry, so that it can be useful for practical application. Few critical details are withheld as these are still undergoing. Details will be discussed in person before joining.



Update on 15th April 2015

I have received number of application showing intend to work under my supervision. Here are few things you need to know before writing me:

  • I take students through Departmental Admission procedure which happens twice a year. You need to check the IIT Guwahati website for application procedure and timing.
  • If you have qualified as CSIR-JRF then you can directly approach me. Institute allows that.
  • You don’t have to contact me before interview/admission test. Approach me after you are selected. This way I get to know you better and you know me as well.
  • Many write randomly to many in the same Department. This creates confusion. Avoid that.

My preferences:

  • I take few so that I can guide you better.
  • I try to train students to become independent researcher. Most of my former student did not have problem doing research on their own.
  • I use multiple instruments which include X-Ray (single crystal, Powder), NMR, ESI-Mass, HPLC, Cyclic voltammetry, EPR, Fluorescence, FTIR and UV-vis regularly. Started using BET isotherm, particle size analyzer, AAS, CD more frequently. Most of my past and present students knows them fairly well. So you get to use large number of tools which helps you to migrate to other areas in future. In fact, most of my past students choose to work in a different area than what they did in PhD thesis.
  • Training takes time. It is unlikely that you will get a quick PhD degree without hard work.
  • I am polite, sincere and committed and expect sincerity and commitment from the student as well.


Research

My expertise is in Coordination Chemistry. Whatever research problem we try to solve have metal ions, organic ligand and coordination complexes at it’s core. The chemical problems that we try to solve are related to Chiral Recognition, Supramolecular Chemistry, Metal Assisted organic transformation, Bioinorganic chemistry, Polymer synthesis & application as well as Heavy Metal removal from waste water (Collaboration with
Saswati Chakravorty ).

About everyday work: It starts with synthesis of organic ligands, metal complexes and characterization using multiple techniques. Rest depends on a particular research problem. Check some of our papers. While selecting research problem for a particular student, I keep in mind their ability, instruments available for use. So first year when you will be finishing your course work, you do reactions and learn instrumental technique, I monitor your capability and decide what you will be able to finish within a reasonable time.

What
minimum knowledge is expected from you: Acid base Concept, Hard soft acid base concept, Spectra chapter from J. D. Lee’s inorganic chemistry book, Lambert Beer Law, point group symmetry, Oxidation Reduction potential, know how to draw benzene ring nicely, Good hand in practical class in B.Sc. and M. Sc. If you know more you have to learn less. If you don’t then you have to learn fast. Writing skill in English. I am getting old so can not write your thesis. 😁

Future direction of or research. What you see in website is what we have done already. We have done many more which remain unpublished till now. We are almost done with chiral recognition with Ni(II) complexes. Next stop making new cavities with kinetically inert Co(III) or Cr(III) variety. Other things that I have in mind: (a) We are interested now using the cavity for stereospecific reactions, (b) binding or embedding these chiral cavity inside polymer matrix, (c) New micron to nano sized polymer beads with functionalized group on the surface, (d) nano sized magnets coated with functionalized polymer for binding with chiral recognition sites, (e) voltage triggered chiral assembly. Some of these may sound different but many of them are interconnected.

What we won’t be doing. No cure for cancer. No anti-bacterial agent. 😂