bio

Dr.Gopal Das

Associate Professor


Department of Chemistry
Indian Institute of Technology Guwahati
Guwahati - 781 039, Assam, INDIA
Tel: (0361)-258 2313(O)
(0361)-258 2335(Lab)

Email:gdas@iitg.ernet.in
g.das@mailcity.com



Welcome to the Home Page of Dr. Gopal Das



PERSONAL PROFILE

2008-till date, Associate Professor, Department of Chemistry, Indian Institute of Technology Guwahati, Assam, India

2004-2008, Assistant Professor, Department of Chemistry, Indian Institute of Technology Guwahati, Assam, India

2003-2004, Lecturer, Department of Chemistry, Birla Institute of Technology and Science, Pilani, Rajasthan, India

1999-2003, Postdoctoral Research Associate, University of Geneva, Switzerland

1994-1999, Doctor of Philosophy, Indian Institute of Technology, Kanpur, India

1991-1993, Master of Science, Calcutta University, India

1988-1991, Bachelor of Science, Calcutta University, India

AWARD/HONOR

1. National Eligibility Test (NET), November 1993.

Council of Scientific and Industrial Research (CSIR).

2. Fellowship of Swiss National Science Foundation, November 1999.

3. Recognized by the Chemical Abstract Services (CAS), USA and American Chemical Society (ACS) as author of the "Most Requested Journal Article� in 2004.

EDITORIAL BOARD MEMBER

1. Scientific Journals International

2. Canadian Journal of Pure and Applied Science

SPONSORED PROJECTS

Title: Model studies on the function of supramolecular architecture in the processes of biomineralization.

Sponsor: Council of Scientific and Industrial Research, New Delhi, India

Period: 2005- 2008

Title: Precursor synthesis of inorganic mineral through complexes of mixed donor ligands.

Sponsor: Department of Science and Technology, New Delhi, India

Period: 2008- 2011

Title: Synthesis, characterization of metal oxides and their application to wastewater treatment.

Sponsor: Council of Scientific and Industrial Research, New Delhi, India

Period: 2008- 2011

RESEARCH INTERESTS

The research theme is to explore the broad areas of Supramolecular Chemistry which includes:

Biomineralization and Biomimetic Material Chemistry

Meso-structured Inorganic-Organic Materials

Bioorganic Chemistry

Molecular Photonic and Eletronic Devices

Fluorescent / Luminesccent Sensors and Switches

Langmuir-Blodgett film study of Tailor-made Amiphiphiles.

Self-assembled Supramolucular Chemistry

RESEARCH ACTIVITY

At IIT Guwahati we are currently woriking on :

� Model studies on the function of supramolecular architecture in the process of biomineralization. We are engaged in the study of the mechanism of biomineralization which in turn will help to synthesize new bio-materials for bio-medical engineering. These new materials will have pre-defined structure and function.

� We are synthesizing fluorescent / luminescent sensors and switches and studying their photophysical / photochemical properties.

� We are also engaged in designing and synthesizing new amphiphiles and study their surface properties with the help of Langmuir-Blodgett techniques. These LB films are also used for making new molecular electronic devices.

ADMINISTRITIVE ACTIVITY

DPPC Secretary, Environment Center, 2007-till date

DUPC Secretary, Chemistry Department, 2008-till date

Associate Warden, Siang Hostel, 2009-till date

Vice-Chairman GATE, 2009-2010, IIT Guwahati

LIST OF PUBLICATIONS

1. Synthesis and Uses of Macrobicyclic Cryptands: From Complexation of Transition Metal ions to Molecular Devices.
D.K.Chand, P.Ghosh, R.Shukla, S.Sengupta, G.Das, P.Bandyopadhyay, P.K.Bharadwaj.
Proc. Ind. Acad. Sci. (Chem. Sci), 229, 108, 1996.

2. Synthesis and X-ray Structures of Mixed Ligand Salicylaldehyde Complexes of Mn(III), Fe(III) and Cu(II) Ions:
Reactivity of the Mn(III)Complex Towards Primary Monoamines and Catalytic Epoxidation of Olefins by the Cu(II)Complex.
G.Das, R.Shukla, S.Mandal, R.Singh, P.K. Bharadwaj.
Ionrg. Chem. 323, 36, 1997.

3. Langmuir Films of a Cryptand-Based Amphiphiles at the Air-Water Interface.
G.Das, P.Ghosh, P.K.Bharadwaj, U.Singh, R.A.Singh.
Langmuir, 3582, 13, 1997.

4. Osmium Mediated Selective Aromatic Thiolation Reaction in the Complexes[OS(II){o-SC6H3(R)N=NC5H4N}2].
Synthesis,Spectroscopic Characterization,Electron-Transfer Properties and Crystal Structure of the Complex where R=H.
B.K.Santra, P.Munshi, G.Das, P.K.Bharadwaj, G.K.Lahiri.
Polyhedron, 617, 18, 1999.

5. A Comparative Study of Cryptand Based (Triple-Head-Triple-Tail) Amphiphiles at the Air-Water Interface.
G.Das, P.K.Bharadwaj, U.Singh, R.A.Singh, R.J.Butcher.
Langmuir, 1910, 16, 2000.

6. Facile One-Pot Synthesis of Macrobicyclic/Macrotricyclic Cryptands: Effect of Reactant Concentrations.
G.Das, P.Tripathi, A,Tripathi, P.K.Bharadwaj.
Tetrahedron, 1501, 56, 2000.

7. Transition Metal Cryptate-Enhanced Fluorscence in a Trianthroyl Cryptand: Effect of Spacer on the PET process.
G.Das, P.K.Bharadwaj, M.B.Roy, S.Ghosh.
J. Photoch. Photobio. A: Chemistry, 7, 135(1), 2000.

8. Topological Diversity of Artificial beta-Barrel in Water.
G.Das, S. Matile.
Chirality, 170, 13, 2001.

9. Synthesis and Structure of the [Mn(IV)(biguanide)3]4+ ion: the Simplest Source for water-stable Manganese(IV).
G.Das, P.K.Bharadwaj, D.Ghosh, B.Chaudhuri, R.Banerjee.
Chem. Commun. 323, 2001.

10. Beta-Fibrillogenesis by Rigid-Rod beta-Barrels:Hierarchical Preorganization Beyond Microns
G.Das, L.Quali, M.Adrian, B.Baumeister, K.J.Wilkinson, S.Matile.
Angew. Chem. Int. Ed. Engl. 4657, 40(24), 2001.

11. Toward Catalytic Rigid-Rod beta-Barrels: A Hexamer with Multiple Histidines
G.Das, N.Sakai, S.Matile.
Chirality, 18, 14, 2002.

12. Transmembrane pores formed by synthetic p-octiphenyl beta-barrels with internal carboxylate clusters.
Regulation of ion transport by pH and Mg(II)-complexed 8-aminonaphthalene-1,3,6-trisulfonate
G.Das, S.Matile.
Proc. Natl. Acad. Sci. U.S.A. 5183, 99(8), 2002.

13. Photophysical studies of cryptand based fluorophore systems in different environments.
G.Das, P.K.Bharadwaj, M.Basu Roy, S.Ghosh.
Chemical Physics 277, 145, 2002.

14. Binding of Organic Anions by Synthetic Supramolecular Metallopores with Internal Mg(II)-Aspartate Complexes.
G.Das, H.Onouchi, E.Yashima, N. Sakai, S.Matile.
ChemBioChem 1089, 3, 2002.

15. On the Importance of Intermediate Internal Charge Repulsion for the Synthesis of Multifunctional Pores.
B.Baumeister, A.Som,G.Das, N.Sakai, F.Vilbois, D.Gerard, S.Shahi, S.Matile.
Helv. Chim. Acta 2740, 85, 2002.

16. Fluorimetric Detection of Enzyme Activity with Synthetic Supramolecular Pores.
G.Das, P.Talukdar, S.Matile.
Science, 1600, 298, 2002.

17. Bioorganic Chemistry of Rigid-Rod Molecules: Adventures with p-Oligophenyls.
Y.Baudry, B.Baumeister, G.Das, D.Gerard, S.Matile, N.Sakai, A.Som, N.Sorde, P.Talukdar.
Chimia, 667-671, 56, 2002.

18. Synthetic Multifunctional Pores: Deletion and Inversion of Anion/Cation Selectivity Using pM and pH.
N.Sakai, N. Sorde, G.Das, P. Perrottet, D.Gerard, S.Matile.
Org. Biomol.Chem, 1226-1231, 1(7), 2003.

19. Enzyme Screening with Synthetic Multifunctional Pores:Focus on Biopolymers
N. Sorde, G.Das, S.Matile.
Proc. Natl. Acad. Sci. U.S.A. 11964, 100(21), 2003.

20. Substrate-Independent Transduction of Chromophore-Free Organic and Biomolecular Transformations into Color
G.Das, S.Matile.
Chemistry - A European Journal 2936-2944, 12(11), 2006.

21. A one-pot synthesis and self assembled superstructure of an organic salt of a 1,5-benzodiazepine derivative
Harjyoti Thakuria, Avijit Pramanik, Ballav Moni Borah, G.Das.
Tetrahedron Lett. 3135, 47(18), 2006.

22. One-pot efficient green synthesis of 1,4-Dihydro-quinoxaline-2,3-dione derivatives
Harjyoti Thakuria, G.Das.
J. Chem. Sci. 425-428. 118(5), 2006.

23. Low-Molecular-Weight Poly-Carboxylate as Crystal Growth Modifier in Biomineralization
Ballav Moni Borah, Bhaskar Jyoti Bhuyan, G.Das.
J. Chem. Sci. 519-524, 118(6), 2006.

24. CuO Micro Plates from a 3D Metallo-Organic Framework (MOF) of a Binary Copper(II) Complex of N,N-bis(2-hydroxyethyl)glycine
Harjyoti Thakuria, G.Das.
Polyhedrion 149-153, 26(1), 2007.

25. ZnO Nano Particles from Metal-Organic Framework of Zn(II)- Metallacycles
Harjyoti Thakuria, Ballav Moni Borah, G.Das.
Eur. J. Inorg. Chem. 524-529, 4, 2007.

26. Intermolecular Hydrogen Bonded and Self-assembled beta-pleated Sheet Structures of beta-sulfidocarbonyls
S. Hussain, G.Das, M. K. Chaudhuri.
J. Mol. Stur. 190-196, 837(1-3), 2007.

27. Self-assembled Superstructure of Xanthene Derivatives
V. Kavala, S. Murru, B.K.Patel, G.Das.
J. Chem. Crystallogr. 527-535, 37(8), 2007.

28. Macroporous Metal Oxides as an Efficient Heterogeneous Catalyst for Various Organic Transformations - A Comparative Study
H.Thakuria, B. M. Borah, G.Das.
J. Mol. Cat.A Chemical 1-10, 274, 2007.

29. Molecular, Supramolecular Structure and Catalytic Activity of Transition Metal Complexes of Phenoxy Acetic acid derivatives
A. Pramanik, S. Abbina, G.Das.
Polyhedron 5225-5234. 26(18), 2007.

30. Solid State Synthesis and Hierarchical Supramolecular Self-assembly of Organic Salt Cocrystals
H.Thakuria, B. M. Borah, A. Pramanik, G.Das.
J. Chem. Crystallogr. 807-816, 37(12), 2007.

31. N,N�-Bis(aryl)pyridine-2,6-dicarboxamide complexes of ruthenium: Synthesis, structure and redox properties
M. Dasgupta, S. Nag, G.Das, M. Nethaji, S. Bhattacharya.
Polyhedron 139-150, 27(1), 2008.

32. Tripodal naphthalene ether ligand: Solid-state anion recognition and Fluorescence studies
A.Pramanik, M.Bhuyan, R.Choudhury, G.Das.
J. Mol. Struct. 88-95, 879, 2008.

33. Biomimetic Modulation of Crystal Morphology using Gel: From Nano to Micron Scale Architectures
B. M. Borah, G.Das.
Mater Sci Eng C 1173-1182, 28(7), 2008.

34. Aromatic guest inclusion by a tripodal ligand: Fluorescence and Structural studies
A. Pramanik, M. Bhuyan, G.Das.
J. Photoch. Photobio. A: Chemistry 149-155, 197(2-3), 2008.

35. Trimesic acid coated alumina: An efficient multi-cyclic adsorbent for toxic Cu(II)
B. Saha, S. Chakrabortya, G.Das.
J. Colloid. Interf. Sci. 30-39, 320(1), 2008.

36. Syntheses and regiochemistry of enol addition to 9-phenyl-9H-xanthen-9-ol
V. Kavala, S. Murru, G.Das, B. K. Patel.
Terahedron 3960-3965, 64(18), 2008.

37. Ruthenium monoterpyridine complexes with 2,6-bis(benzimidazol-2-yl)pyridine: Synthesis, Spectral properties and structure
A. Singh, B. Chetia, S. M. Mobin, G.Das, P. K. Iyer, B. Mondal.
Polyhedron 1983-1988, 27(8), 2008.

38. A comparative metal ion adsorption study by Trimesic acid coated alumina: A potent adsorbent
B. Saha, S. Chakrabortya, G.Das.
J. Colloid. Interf. Sci. 26-32, 323(1), 2008.

39. Ruthenium monoterpyridine complexes with 2, 6-bis(benzoxazol-2- yl)pyridine as ancillary ligand: Synthesis, structure and spectral studies
A. Singh, G.Das, B. Mondal.
Polyhedron 2563-2568, 27(12), 2008.

40. Molecular to Supramolecular Structure: Influence of Coordination Environment in Azo-dye Complexes
A. Pramanik, G.Das.
Cryst. Growth. Des. 3107-3113, 8(8), 2008.

41. An expeditious one-pot solvent-free synthesis of benzimidazole derivatives
H. Thakuria, G.Das.
ARKIVOC, 321-328, XV, 2008.

42. A mechanistic insight into enhanced and selective phosphate adsorption on a coated carboxylated surface.
A. Singh, A. Pramanik, G.Das, B. Mondal.
Organometallics 6403-6404, 27, 2008.

43. A mechanistic insight into enhanced and selective phosphate adsorption on a coated carboxylated surface.
B. Saha, S. Chakrabortya, G.Das.
J. Colloid. Interf. Sci. 21-26, 331, 2009.

44. 3D Solid-state Network from Hierarchical Supramolecular Self-assembly of Transition Metal Complexes of Pyridine Based Ligand.
A. Pramanik, G.Das.
J. Chem. Crystallogr. xxx-xxx, xx(xx), 2009.

45. An Efficient Phosphate Sensor: Tripodal Quinoline Excimer Transduction.
A. Pramanik, G.Das.
Tetrahedron, xxxx-xxxx, xx(x), 2009.

46. Lactic Acid Bacterial Extract as a Biogenic Mineral Growth Modifier
B. M. Borah, A. Singh, A. Ramesh, G.Das.
J. Cryst. Growth, xxxx-xxxx, xx(x), 2009.

REVIEW

1. Synthesis and Study of Cu(II)-Thiolato Complexes: Bioinorganic Perspectives.
S.Mandal, G.Das, R.Shukla, R.Singh, P.K.Bharadwaj.
Coord. Chem. Rev. 160, 191, 1997.

2. "Never Mind a Barrel"
B.Baumeister, G.Das, N.Sakai, S. Matile.
Chimia,55(4),301-304,2001.

INVITED TALK

1. Hierarchical Self-Organization of Rigid-Rod Molecules: From Tertiary beta-Barrel to Quarternary beta-Fibril Structures.
"Lipids and Biomembranes: New Technologies" Octobre 2-5, 2002, Davos, Switzerland.

2. Practical Fluorimetric Sensing Applications of Rigid-Rod beta-Barrel Ion Channels.
Fall Meeting of the Swiss Chemical Society, Octobre 17, 2002, Basel Switzerland.

3. Applications of Gaussian software
UGC refresher course on �Theoretical and Computational Chemistry�, December 8-28, 2003,
Birla Institute of Technology and Science, Pilani, Rajasthan, India.

4. Fluorometric Detection of Enzyme Activity with Synthetic Supramolecular Artificial beta-Barrel
National Symposium on Chemistry at the Inorganic and Organic Interphase
December 6-7, 2004, IIT Guwahati, India.

5. Langmuir-Blodgett Films and Their Use in Molecular Electronics
QIP Short term course on �Semi-conducting organics as future generation electro-optical materials
June 20-24, 2005, IIT Guwahati, India.

6. Photo-induced electron transfer (PET) sensors, switches and logic gates
QIP Short term course on �Semi-conducting organics as future generation electro-optical materials
June 20-24, 2005, IIT Guwahati, India.

7. Natural and Synthetic Polycarboxylate as a Crystal Growth Modifier of Calcium and Barium Biominerals
Modern Trends in Inorganic Chemistry (MTIC-XI) December 8-10, 2005, IIT Delhi, India.

8. Biomineralization: Future of Inorganic Chemistry
Kalyani University, Kalyani, West Bengal, June 2006.

9. Luminescence Spectroscopy: Application in analytical chemistry
UGC refresher course on �Current Trends in Chemistry with special emphasis on Analytical Techniques�, March 11-31, 2007.
Gauhati University, Guwahati, Assam, India.

10. Synthesis of Inorganic Mineral through Precursor Complexes
Discussion meeting on “Crystal Engineering and Noncovalent Interactions: Contemporary Themes and Futuristic Developments” February 22-25, 2009.
Orange County, Coorg, India.

11. Fluroescence Spectroscopy: Princple and Application
UGC sponsored course on “2nd Scholars’ Programme in Sciences (II)” March 25, 2009
Gauhati University, Guwahati, Assam, India.

REPORT

1. Synthesis and Characterization of Cu(II) and Ni(II) complexes with Heteroditopic Cryptands: Crystal Structure of a
Strongly Bonded Cu(II) OH2 Inclusion Complex.
G.Das, D.K.Chand, P.K.Bharadwaj.
Symposium on Modern Trends in Inorganic Chemistry, December 4-6, 1997.
Department of Chemistry, Indian Institute of Technology, Kanpur, India.

2. Fluorescent Signaling with Transition and Inner-Transition Metal Ions.
P.Ghosh, G.Das, P.K.Bharadwaj.
Symposium on Frontiers in Inorganic Chemistry.
Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India.

3. En Route to Intra-Toroidal Catalysis
B.Baumeister, N.Sakai, G.Das, S. Matile
National Research Program "Supramolecular Functional Materials", Kick-off Meeting, 30.06.2000
Berne, Switzerland.

4. Hierarchical Self-Organization of Rigid-Rod Molecules: From Tertiary beta-Barrel to Quartenary beta-Fibril Structures
G.Das, L.Quali, B.Baumeister, K.J.Wilkinson, S.Matile.
Swiss Chemical Society Fall Meeting 2001, 12.10.2001
Zurich, Switzerland.

5. A Barrel-Stave Supramolecule with Ion Channel, Hydrolase, and Fibrillogenic Activity
B.Baumeister, G.Das, N.Sakai, A. Som, D.Gerard, S.Matile.
National Research Program "Supramolecular Functional Materials" 23.10.2001
Berne, Switzerland.

6. Green Synthesis of 3D-Polymeric Metallo-Organic Framework of Zn(II) Metallocycles with 1D "Zig-Zag" Water Chain
Harjyoti Thakuria, Ballav Moni Borah, G.Das.
Modern Trends in Inorganic Chemistry (MTIC-XI) December 8-10, 2005, IIT Delhi, India.

7. A One-pot Synthesis and Self-assembled Superstructure of Organic salts of a 1,5-benzodiazepine derivative.
Harjyoti Thakuria, Avijit Pramanik, Ballav Moni Borah, G.Das.
2nd Mid Year Symposium of CRSI, 21st July 2007, IIT Guwahati, India.

8. Spectroscopic and Structural Studies of Supramolecular Host-Guest System.
Avijit Pramanik,G.Das.
Modern Trends in Inorganic Chemistry (MTIC-XII) December 6-8, 2007, IIT Madras, India.

9. Lactic Acid Bacterial Extract as a Biogenic Mineral Growth Modifier.
Ballav Moni Borah, Atul K. Singh, Aiyagari Ramesh, G.Das.
CRSI National Symposium in Chemistry (NSC-10), February 1-3, IISc Bangalore, India.

10. Studies of 2-alkyl Substituted Benzimidazole Amphiphiles.
Bimlesh Ojha, G.Das.
CRSI National Symposium in Chemistry (NSC-11), February 6-8, NCL Pune, India.

WORKSHOP PRESENTATIONS

1. DST sponsored National Workshop on the Art of the X-ray Crystallography held on March 31-April 1, 1995.
Department of Chemistry, Indian Institute of Technology, Kanpur, India.

2. HPLC and EM users Workshop held on March 15, 1996.
Central Drug Research Institute (CDRI), Lucknow, India.

3. Swiss National Chemical Society sponsored Workshop on the Supramolecular Functional Materials : Scientific Communication held on May 11, 2001.
Berne, Switzerland.

ORAL PRESENTATIONS

1. Modern Trends in Inorganic Chemistry (MTIC- VII) held on
December 4-6, 1997.
Department of Chemistry, Indian Institute of Technology, Kanpur, India.

2. 8th National Conference on Surfactants, Emulsions and Bio-Colloids (NATCOSEB-VIII) held on
October 18-20,1997.
Sambalpur University, Orissa,India.

3. Universtiy Conference of Western Switzerland on "Metal Ions In Biological Systems" held on
September 11-14, 2000
Champery, Switzerland.

4. Swiss National Chemical Society sponsored Workshop on the Supramolecular Functional Materials : Scientific Communication held on
May 11, 2001.
Berne, Switzerland.

STUDENTS

Ph. D.
1. Mr. Ballav Moni Borah 2004
2. Mr. Avijit Paramanik 2005
3. Mr. Saitanya K. Bharadwaj 2005 (Co-guide)
4. Mr. Harjyoti Thakuria 2006
5. Mr. Bedabrata Saha 2006
6. Mr. Bimlesh Ojha 2006
7. Mr. Sandeep Kr. Dey 2007
8. Mr. Arghya Basu 2008

M. Sc. Project
1. Mr. Priyanshu Sharma 2003
2. Ms. Deepa Sritharan 2004
3. Mr. R. Pritish Narayanan 2004
4. Mr. Bhaskar Jyoti Bhuyan 2005
5. Ms. Mouchumi Bhuyan 2006
6. Mr. Srinivas Abbina 2006
7. Ms. Hema Lakshmi Puppala 2006
8. Mr. Mrinmoy Saha 2007
9. Mr. Subhojit Majumdar 2008
10. Mr. Nikhil Kr. Mondal 2008
11. Mr. Sourav Das 2009
12. Ms. Madhubrata Ghosh 2009
13. Ms. Soma Dey 2009

Summer Project
1. Mr. Anup Malakar 2005
2. Mr. Dipankar Saha 2006
3. Mr. Rajib Choudhury 2006
4. Mr. Priyatosh Mandal 2007
5. Mr. Pallab Mondal 2007
6. Mr. Nilanjal Mishra 2007
7. Ms. Dimpy Sharma 2007
8. Mr. Arijit Mukherjee 2008
9. Mr. Partha Pratim Das 2008
10. Mr. Sourav Das 2008
11. Mr. Subrata Jana 2009
12. Mr. Subrata Guchait 2009
13. Mr. Shyam Sundar Samata 2009
14. Mr. Rajdeo Das 2009

TEACHING EXPERIENCE

In BITS, Pilani
1. Chemistry � I (B. Tech. course)
2 Chemistry � II (B. Tech. course)
3. Chemistry Laboratory (B. Tech. course)
4. Stereochemistry and reaction mechanism (M. Sc.course)
5. Stereoselective organic synthesis (M. Sc. course)
6. Structure and reactivity of organic compounds (M. Sc. course)
7. Physical Organic Chemistry (Ph. D. Course)

In IIT Guwahati
1. CH-002 Preparatory Chemistry (pre-B. Tech course)
2. CH-101 General Chemistry (B. Tech. course)
3. CH-110 General Chemistry Laboratory (B. Tech. course)
4. CH-201 Prelimineries of Inorganic Chemistry (M. Sc course)
5. CH-410 Transition and Non-transition Metal Chemistry (M. Sc. course)
6. CH-411 Inorganic Reaction Mechanism and Organometallics (M. Sc. course)
7. CH-415 Inorganic Chemistry Laboratory (M. Sc. course)
8. CH-611 Bioinorganic Chemistry (M. Sc. course)
9. CH 605 Applied Crystallography (Ph. D. Course)
10. CH-603 Supramolecules: Concept and Applications (Ph. D. Course)
11. CH-616 Bioinorgnic (Ph. D. Course)
11. CH-500 Graduate Seminar (M. Sc. Course)




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