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Room Temperature Organocatalysis/Photocatalysis: The field of catalysis is well recognized for its scientific/social impacts and Nobel Prize awards in this field in 2001 by Knowles, Noyori and Sharpless for stereo-selective oxidation, in 2005 by Chauvin, Grubbs and Schrock for metathesis, in 2010 by Heck, Negishi and Suzuki for cross coupling and most recently in 2021 by Benjamin List and David MacMillan for asymmetric organocatalysis. Using various ruthenium and iridium metal complexes, we are trying to develop new organic methodologies. Our main focus is to development of various macro-cyclic scaffolds with different binding site (mainly carbon or nitrogen) so that selectively different metal can bind and display merging catalytic reactivity.
Recent Publications-
Org. Lett. 2025. 27, 1537−1543 [Link]; J. Org. Chem., 2024, 89, 22, 16750–16758. [Link]; Org. Chem. Front., 2024, 11, 6367-6379. [Link]; ACS Catal. 2024, 14, 9, 6633–6643 [Link]; Chem. Eur. J. 2023, e202303337 [Link], J. Org. Chem. 2023. [Link], Chem. Eur. J. 2023, e202301637 [Link] ; Org. Lett. 2023, 25, 1, 184–189 [Link].
Catalysis in Heteroditopic Macrocyclic/bicyclic Host: Heteroditopic macrocyclic/ bicyclic host structures are the potential candidates to generate a reaction micro-environment for various guest substrates via employing innovative supramolecular interactions (Hydrogen bonding, Halogen bonding, Columbic interaction, π-π stacking interaction etc.) due to the high binding affinity as well as well-structured three dimensional cavities. Thus, briefly the main focus of this research is to carefully design and synthesize various novel and well-organized multi-functional macrocyclic/bicyclic hosts for assisting a catalytic pathway toward desired regio/stereoselective product formation.
Recent Publications-
Small 2023. 2304794 [Link], Chem. Eur. J. 2021, 27, 7307-7314 [Link]; J. Org. Chem. 2021, 86, 6648-6664 [Link]
Chalcogen Bonding in Anion Chemistry: Chalcogen bonding interaction which takes place between an electron-deficient, covalently bonded group 16 element (with positive electrostatic potential) and a Lewis base with highly directionality over hydrogen bonding interaction. After wide research on hydrogen and halogen bonding our focus is to study this non covalent interaction in the field of catalysis as well as recognition and extraction of specific anions from water or organo-aqueous medium so that it can be helpful for biological as well as environmental issues. We mainly focus on chalcogen, halogen and hydrogen bonding based recognition and extraction of anions in aqueous medium to address some of the problems associated in industrial discharged water.
Recent Publications-
ChemSusChem 2025, e202500751 [Link]; Inorg. Chem. 2025, 64, 4, 1768–1776 [Link]; Coord. Chem. Rev. 2025, 522, 216225 [Link]; iScience. 2024, 27, 108917 [Link]; ACS Appl. Mater. Interfaces 2023, 15, 21, 25184–25192 [Link]
Anion Recognition and Sensing: Using hydrogen and halogen bonding, we have synthesized various receptors for selective recognition as well as sensing and extraction of specific anions such as phosphate, sulphate, perrhenate etc. Our present research mostly focuses on halogen and hydrogen bonding based recognition of phosphates and perrhenate, ReO4- (surrogate of highly toxic and radioactive by-product pertechnetate, 99TcO4- in nuclear fuel generation) to address the environmental issues like eutrophication of water body due to excess use of phosphate based fertilizers in agriculture and nuclear waste reprocessing/disposal problems. We are also focused on polymer based anion receptors for separation of ions.
Recent Publications-
Chem. Asian J. 2025, 0, e70183 [Link]; Inorg. Chim. Acta. 550 (2023) 121453 [Link]; Inorg. Chem. 2021, 60, 9084–9096 [Link]
Catenanes and Rotaxanes Based Sensing: Supramolecular architectures such as Rotaxanes and pseudorotaxanes can be used for sensing due to its ability to form various non-covalent interactions. These supramolecular giant molecules can be used in the field of sensing for selective ions. We work on template directed interlocked molecular systems (rotaxanes, catenanes and pseudorotaxanes) for the development of molecular machines as well as metal ion assisted self-assembly to develop artificial helicates.
Recent Publications-
Dalton Trans. 2022, 51, 13507-13514 [Link]; Org. Biomol. Chem., 2022, 20, 7284-7293 [Link]
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