Department of Chemical & Biological Sciences

Head of Department

Dr. Gitish Kishor Dutta
Ph.D. IISc Bangalore




Dr. Naba Kamal Nath Associate Professor

Ph. D, University of Hyderabad

Research Interest

Crystal Engineering, Energy Converting Smart Materials, Solid State Forms of Pharmaceuticals

Education Qualification

Ph. D, University of Hyderabad

Work Experience

  1. Postdoctoral fellow, Kyoto University, Japan (2012-2013)
  2. Postdoctoral Associate, New York University Abu Dhabi (2013-2015)
  3. Assistant Professor, Chemistry Department, NIT Meghalaya (July 2015 to Dec 2023)
  4. Associate Professor, Chemistry Department, NIT Meghalaya (Dec 2023 to present)

Research Interest

Smart Materials, Pharmaceutical Solid Form, Crystal Engineering



Flexible Chlorinated Azine Molecular Crystals and Their Photothermally Driven Actuation

Pragyan J. Hazarika, Poonam Gupta, Anilkumar Gunnam, Ranjit Thakuria, Ashwini K. Nangia, Naba K. Nath

Cryst. Growth Des. 2023, (just accepted) 

Polymorphs with remarkably distinct physical and/or chemical properties

BK Saha, NK Nath, R Thakuria
The Chemical Record, 2023,  23 (1), e202200173


Fast and reversible bidirectional photomechanical response displayed by a flexible polycrystalline aggregate of a hydrazone
P Gupta, S Allu, PJ Hazarika, NR Ray, AK Nangia, NK Nath

CrystEngComm 24 (41), 7261-7265


1.Organic Molecular Crystals with Dual Stress-Induced Mechanical Response: Elastic and Plastic Flexibility

P Gupta, S Allu, D. P. Karothu, T Panda, Naba K. Nath

Cryst. Growth Des. 2021, 4, 1931-1938.

2.Photomechanical response of sulfonylhydrazone molecular crystals

P. J. HazarikaP GuptaA GunnamS AlluA. K. NangiaNaba K. Nath

CrystEngComm, 2021,23, 4910-4916.



3.Mechanical Flexibility of Molecular Crystals Achieved by Exchanging Hydrogen Bonding Synthons

P Gupta, S. A. Rather, B. K. Saha, T Panda, D. P. Karothu, Naba K. Nath

Cryst. Growth Des. 2020, 20, 2847–2852.



4.Plastically Deformable and Exfoliating Molecular Crystals of a 2-D Coordination Polymer and Its Ligand

Naba K. Nath, P Gupta, P. J. Hazarika, N Deka, A Mukherjee, G. K. Dutta

Cryst. Growth Des. 2019, 11, 6033–6038.

5.Crystalline Acylhydrazone Photoswitches with Multiple Mechanical Responses

P Gupta, T Panda, S Allu, S Borah, A Baishya, A Gunnam, A Nangia, P Naumov, Naba K. Nath

Cryst. Growth Des. 2019, 19, 3039–3044.

6. The Nature and Applications of pi–pi Interactions: A Perspective

R Thakuria, Naba K. Nath, B. K. Saha

Cryst. Growth Des2019, 19, 523-528.



7. Thermally Twistable, Photobendable, Elastically Deformable, and Self-Healable Soft Crystals

P. Gupta, D. P. Karothu, E. Ahmed, P. Naumov, N. K. Nath

Angew. Chem. Int. Ed2018, 57, 8498-8502. (Hot paper)

8. Mechanochemical Synthesis of Olanzapine Salts and Their Hydration Stability Study Using    Powder X ray Diffraction

K. K. Sarmah, P. Sarma, D. R. Rao, P. Gupta, Naba K. Nath, M. Arhangelskis, R. Thakuria

Cryst. Growth Des2018, 18, 2138-2150.

9. Synthesis and characterization of two dioxidomolybdenum(VI) complexes bearing amidinato      and pyrazolato ligands and their use in thin film growth and oxygen atom transfer reactions

O. M. El-Kadri, A. A. Siddique, M. D. Eaton, Naba K. Nath

Polyhedron 2018, 147, 36-41.

10. Plastically bendable crystals of probenecid and its cocrystal with 4,4´-Bipyridine

Naba K. Nath, M. Hazarika, P. Gupta, N. R. Ray, A. K. Paul, E. Nauha

J. Mol. Str. 2018, 1160, 20-25.



11. The Light Emitter of the 2-Coumaranone Chemiluminescence: Theoretical and Experimental Elucidation of a Possible Model for Bioluminescent Systems

S. Schramm, I. Navizet, P. Naumov, Naba K. Nath, R. Berraud-Pache, P. Oesau, D. Weiss, R. Beckert

Eur. J. Org. Chem.2016, 678-681.



12. Mechanically Responsive Molecular Crystals

P. Naumov, S. Chizhik, M. K. Panda, Naba K. Nath, E. Boldyreva

Chem. Rev., 2015, 115, 12440-12490.

13. Surface and Bulk Effects in Photochemical Reactions and Photomechanical Effects in Dynamic Molecular Crystals

Naba K. Nath, T. Runc?evski, C.-Y. Lai, M. Chiesa, R. E. Dinnebier, P. Naumov

J. Am. Chem. Soc., 2015, 137, 13866-13875.

14. Single-Crystal-to-Single-Crystal Transition in an Enantiopure [7]Helquat Salt: The First Observation of a Reversible Phase Transition in a Helicene-Like Compound

Naba K. Nath, L. Severa, R. A. Kunetskiy, I. Císa?ová, M. Fulem, K. R?ži?ka, D. Koval, V. Kašic?ka, F. Teplý, P. Naumov

Chem. Eur. J.2015, 21, 13508-13512. (Hot Paper)

15. In situ Crystallization and Crystal Structure Determination of Chlorobenzene

Naba K. Nath, P. Naumov

Macedonian Journal of Chemistry and Chemical Engineering2015, 34, 63-66.

16.Structure–Reactivity Correlations and Mechanistic Understanding of the Photorearrangement and Photosalient Effect of ?-Santonin and Its Derivatives in Solutions, Crystals, and Nanocrystalline Suspensions

P. Commins, A. Natarajan, C.-K. Tsai, S. I. Khan, Naba K. Nath, P. Naumov, M. A. Garcia-      Garibay

Cryst Growth & Des.2015, 15, 1983-1990.



17. Colossal Positive and Negative Thermal Expansion and Thermosalient Effect in a Pentamorphic Organometallic Martensite

M. K. Panda, T. Run?evski, S. C. Sahoo, A. A. Belik, Naba K. Nath, R. E. Dinnebier, P. Naumov

Nature Communications2014, doi:10.1038/ncomms5811

18. Model for photoinduced bending of slender molecular crystals

Naba K. Nath, L. Pejov, S. M. Nichols, C. Hu, N. Saleh, B. Kahr, P. Naumov

J. Am. Chem. Soc.2014, 136, 2757-2766

19. Structural elucidation of the neuraminidase inhibitor zanamivir (Relenza): creeping and diffusion    for polymorph separation

Naba K. Nath, N. Yasuda, W. M. Rabeh, S. C. Sahoo, P. Naumov

Cryst Growth & Des.2014, 14, 770-774.

20. Actuation based on thermo/photosalient effect: biogenic smart hybrid driven by light and heat

S. C. Sahoo, Naba K. Nath, L. Zhang, M. H. Semreen, T. H. Al–Tel, P. Naumov

RSC Adv.2014, 4, 7640-7647.

21. Why is firefly oxyluciferin a notoriously labile substance?

O. V. Maltsev, Naba K. Nath, P. Naumov, L. Hintermann

Angew. Chem. Int. Ed.2014, 53, 847-850.

22. Thermally induced and photoinduced mechanical effects in molecular single crystals—a revival

Naba K. Nath, M. K. Panda, S. C. Sahoo, P. Naumov

CrystEngComm2014, 16, 1850-1858.

23.  Thermally induced and photoinduced mechanical effects in molecular single crystals—a revival

Naba K. Nath, M. K. Panda, S. C. Sahoo, P. Naumov

CrystEngComm2014, 16, 1850-1858

24. Polymorphism and isostructurality in sulfonylhydrazone

R. Thakuria, Naba K. Nath, A. Nangia

CrystEngComm, 2014, 16, 4681-4690.



25.  Biomimetic crystalline actuators: structure–kinematic aspects of the self-actuation and motility of thermosalient crystals

S. C. Sahoo, M. K. Panda, Naba K. Nath, P. Naumov

J. Am. Chem. Soc.2013, 135, 12241-12251.

26.Visible-light-induced photodimerization of a photoactive yellow protein (PYP) chromophore model in a single crystal

Naba K. Nath, K. Manoj, A. S. Gâz, P. Naumov

Chem. Eur. J. 2013, 19, 8094-8099.

27. Resolution of (RS)-binol through co-crystal formation with 3-n-propyl-4-((R/S)-1?-phenylethylamino)butanoic acid

B. N. Roy, G. P. Singh, P. S. Lathi, R. Mitra, Naba K. Nath, A. Kalyanchakravarthi, A. Nangia

Indian Journal of Chemistry2013, 52B, 394–404.

28. Temozolomide hydrochloride dihydrate

N. J. Babu, P. Sanphui, Naba K. Nath, U. B. R. Khandavilli, A. Nangia

CrystEngComm2013, 15, 666-671.



29. Isomorphous crystals by chloro–methyl exchange in polymorphic fuchsones

Naba K. Nath, A. Nangia

Cryst Growth & Des.2012, 12, 5411-5425.

30. Chiral and racemic tetramoprhs of t-butylfuchsone

Naba K. Nath, S. Nilapwar, A. Nangia

Cryst Growth & Des., 2012, 12, 1613-1625.

(Invited cover art March 2012 issue)



31.Neutral and zwitterionic polymorphs of 2-(p-tolylamino)nicotinic Acid

Naba K. Nath, S. S. Kumar, A. Nangia

Cryst Growth & Des.2011, 11, 4594-4605.

(IUCR best poster in ICCOSS XX, Bengaluru, India)

32. Crystal structure of methyl paraben polymorph II

Naba K. Nath, H. Aggarwal, A. Nangia

Cryst Growth & Des., 2011, 11, 967-971.

33. Crystal structures of mirtazapine molecular salts

B. Sarma, R. Thakuria, Naba K. Nath, A. Nangia

CrystEngComm2011, 13, 3232-3240.

34. Novel form V of tolbutamide and a high Z ? crystal structure of form III

Naba K. Nath, A. Nangia

CrystEngComm2011, 13, 47-51.

(Structure of the week in Crystal Growth & Design Network)



35.N–H… N (pyridyl) and N–H… O (urea) hydrogen bonding and molecular conformation of N-aryl-N?-pyridylureas

S. K. Chandran, Naba K. Nath, S. Cherukuvada, A. Nangia

J. Mol. Struct.2010, 968, 99-107.



36.Synthon competition and cooperation in molecular salts of hydroxybenzoic acids and aminopyridines

B. Sarma, Naba K. Nath, B. R. Bhogala, A. Nangia

Cryst Growth & Des.2009, 9, 1546-1557.



37.Polymorphism in fuchsones

S. K. Chandran, Naba K. Nath, S. Roy, A. Nangia

Cryst Growth & Des.2008, 8, 140-154.

(Special issue on Facets of Polymorphism in Crystals)

38. Isostructural polymorphs of triiodophloroglucinol and triiodoresorcinol

Naba K. Nath, B. K. Saha, A. Nangia

New J. Chem., 2008, 32, 1693-1701. (Special issue on Polymorphism and Crystal forms)

Group Members

Group members:


7. Ms Daphi Gareane Syiemlieh

Joined 2024


6. Mr Rasendra Shukla

Joined 2024


5. Mr Plabon Saikia


Joined 2021

4. Mr Pulakesh Gogoi


Joined: 2021

3. Ms Silpi Sikha Borah


Joined: 2020

2. Mr Pragyan Jyoti Hazarika


Joined: 2018

PhD thesis title: Photomechanically Responsive Crystalline Materials of Schiff Base and Azobenzene Based Photoswitches

Status: Thesis Submitted.

1. Ms Poonam Gupta


Joined: 2017

PhD thesis title: Single, Dual and Multi-stimuli Responsive Molecular Crystal

Status: Degree awarded

MSc student


1. Nisha Basumatari



1. Poonam Gupta (2016-2017)

Pursuing Ph.D. in the Department of Chemistry, NIT Meghalaya

2. Nisha Rani Ray (2016-2017)

3. Dola Dev (2016-2017)

Pursuing Ph.D. in the Department of Chemistry, IIT Kharagpur

4. Anamika Baishya (2017-2018)

Pursuing Ph.D. in the Department of Chemistry, CIT Kokrajhar

5. Silpi Sikha Borah (2017-2018)

Pursuing Ph.D. in the Department of Chemistry, NIT Meghalaya

6. Debika Barman (2018-2019)

Pursuing Ph.D. in the Department of Chemistry, IIT Guwahati

7. Saranga Baishya (2018-2019)

Pursuing Ph.D. in the Department of Chemistry, Tezpur University

8. Trisha Chatterjee (2018-2019)

9. Pulakesh Gogoi (2019-2020)

Pursuing Ph.D. in the Department of Chemistry, NIT Meghalaya

10. Amarjyoti Mondal (2019-2020)

11. Shahnaz Begum (2019-2020)

12. Priya Gurung (2020-2021)

13. Plabon Saikia (2020-2021)

14. Prasitditya Kuri (2020-2021)

15. Gaatha Madhusoodanan (2021-2022)

16. Anagha Sreedharan (2021-2022)

17. Dharitree Das (2022-2023)

18. Swagatam Dhara (2022-2023)

19. Bipasha Saikia (2022-2023)

20. Aswin S (2022-2023)

Courses Taught

  • B.Tech

  • CY 102: Environmental Science 
  • CY 101: Engineering Chemistry
  • CY 151 Chemistry Laboratory


  • CY 403 Basic Inorganic and Main Group Chemistry
  • CY 404 Transition and Post Transition Metal Chemistry and Reaction Mechanism
  • CY 409 Analytical and Environmental Chemistry
  • CY 503 Organometallic and Bioinorganic Chemistry
  • CY 542 Supramolecular Chemistry
  • CY 482 Inorganic Chemistry Laboratory


(i) The Science & Engineering Research Board, Early Career Research Grant (ECR grant no: 000331).

Project title: Smart Biomimetic Molecular Crystal for Energy Conversion.

Amount: Rs. 37,07000

PI: Dr. Naba Kamal Nath


Duration: June 2016 to June 2019

(ii) NIT Meghalaya Start Up Grant.

Project title: Alternate solid state formulation to optimize physico-chemical properties of active pharmaceutical ingredients.

(iii) Technical Education Quality Improvement Programme of Government of India (TEQIP III).

Project title: A systematic study on photoresponsive azobenzene based molecular crystals.

(iv) The Science & Engineering Research Board, Core Research Grant (ECR grant no: 004607).

Project title: Multi-stimuli responsive smart crystalline material derived from organic molecular photoswitch

Amount: Rs. 31,72,400

PI: Dr. Naba Kamal Nath


Duration: Jan 2019 to Dec 2022

(v) Biotechnology Industry Research Assistance Council (BIRAC)

Project title: Multi-component Pharmaceutical Solid for Developing Skin Rejuvenating Facial Peel-Off Mask

Amount: Rs. 50,00,000

PI: Dr. Naba Kamal Nath


Duration: Sept 2023 to Sept 2025