Catalysis plays an important role in life cycle. The natural catalysts present in our system, not only involves in the chemical transformation, but they are also recycled. The heterogeneous catalysts are good for organic transformation, but high quantity of catalysts is used and it has poor selectivity. In contrast the homogeneous catalysts are very good but suffer poor recyclability. Thus there is a great amount of thrust given to develop the heterogenization of homogeneous catalysts and as a result new supported catalysts with well defined positions of supporting units are being developed. Thus this work involves three broad area of Inorganic chemistry, namely

(i) coordination polymers
(ii) Organometallics, and
(ii) homo-and/heterogeneous catalysis.

Besides we want to study the materialistic aspects of the support and house the important materials inside the cavity. Therefore, in the first part, we are involved in developing the supports which is essential to

(a) incorporate molecular catalysts
(b) carryout reactions inside the channels and
(c) the study of material applications in the area of sorption and luminescence.

In this regard, we have chosen heterocyclic ring containing linkers, such as pyridine and thiophene, imidazolium ions to prepare coordination polymers with different metal ions. Compared to the other heterocyclic ring systems or other two electron donors, NHCs are one of the versatile ligands used in the molecular catalysts for the organic transformation (organometallic chemistry and catalysis). In the catalysts preparation, understanding the electronic property of NHCs are necessary. Therefore, in recent years, we have been also engaged in the synthesis and reactivity of NHCs/ modified NHCs, which are precursors for the linkers in the preparation of CPs, apart from understanding the electronic nature of NHCs. These expertises will be used later for the preparation of supported catalysts.

• Coordination Polymers Built with Transition Metal Sulphates and Angular 2,5-bis (imidazol-1-yl) thiophene(thim2): Synthesis, Structure and Photoluminescent Properties,Cryst. Eng. Commun., 16, 6203 (2014)

• Structural Diversity and Luminescent Properties of Coordination Polymers Based on Mixed Ligands, 2,5-Bis(Imidazol-1-yl) Thiophene(Thim2) and Aromatic Multicarboxylates,Cryst. Eng. Commun., 16, 7914 (2014)

• A Hexameric Hexagonal Organotin Macrocyle. Supramolecular Entrapment of Iodide Anions with a Short Contact,Cryst. Growth. Des. 14, 3182 (2014)

• Backbone Thio-Functionalized Imidazol-2-ylidene−Metal Complexes: Synthesis, Structure, ElectronicProperties, and Catalytic Activity,Organometallics 32, 7006 (2013).

• Synthesis and Characterization of NHC-Stabilized Zinc Aryloxide and Zinc,Organometallics 26, 1089 (2007)

• N-alkylimidazolium Salts based Room Temperature Ionic Liquids: Synthesis and their Utility in Beckmann Rearrangement,Tet. Lett 48, 9059 (2007)

• Control of molecular topology and metal nuclearity in multimetallic assemblies:Designer metallosiloxanes derived from silanetriols,Chem. Eur. J. 10, 4106 (2004)

• Reactions of 2-Mercapto-benzoic Acid with Divalent Alkaline Earth Metal Ions: Synthesis, SpectralStudies, and Single-Crystal x-ray Structures of Calcium, Strontium, and Barium Complexes of 2,2'-Dithiobis(benzoic acid),Inorg. Chem. 40, 6870 (2001)

• Lecturer, IIT Kanpur, 2004

• Assistant Professor, IIT Kanpur, 2007

Office

FB-423,
Department of Chemistry
IIT Kanpur,
Kanpur 208016

Office Phone: 0512-259-7517 (O)

Email: garaman[AT]iitk.ac.in