Sustainable Hexa-Nuclear Copper(II) Metallamacrocycle for Heterogeneous Dehydrocyclization-Based Synthesis of Quinolines and 1,8-Naphthyridines Gopal Kanrar, Debashis Jana, Koushik Sarkar, Rajarshee Dey, Soumita Layek, Kausikisankar Pramanik, Sanjib Ganguly Inorganic Chemistry, 2026 -phenanthroline in a stoichiometric ratio. Structural elucidation by single-crystal X-ray diffraction (SC-XRD) confirms a covalently connected hexagonal chairlike topology in which six Cu(II) centers are interconnected by azidoisophthalate ligands, affording hydrophobic cavities of around 6-7 Å. Significant π-π interactions between ancillary phenanthroline coligands promote clustering among hexa-nuclear metallamacrocycles, thereby enhancing the accessibility of the catalytic site. Leveraging these characteristics, the complex was employed as a heterogeneous catalyst for solvent-free dehydrogenation of secondary alcohols and single pot stepwise process (SPSS) cascade synthesis of quinoline and 1,8-naphthyridine derivatives presenting moderate-to-good yields, satisfactory turnover numbers (TONs) and turnover frequencies (TOFs). The robust catalyst exhibits very good recyclability, and mechanistic insights are revealed through control experiments. This catalytic protocol integrates oxidant-free and solvent-free conditions, minimizes waste generation, ensures high atom economy, and catalyst recyclability enables efficient catalysis under moderate temperatures.
Se induced CdTe solar cell: A simulated study on structure and properties K. Sarkar, S. Banerjee Results in Engineering, 2026 • The utility and deficiencies of this solar cell have been analyzed by comparing them with standard CdS / CdTe solar cell results. • When a fully interdiffused CdTeSe composite absorber layer (100 nm) is used, the inner grain photoconductivity is substantial, which enhances the VOC and ƞ. • Inserting a very thin CdS layer in the FTO/CdTeSe layer changes the photoinactive region of the FTO/CdTeSe interface to the photoactive region. As a result, the improvement of V OC can be observed due to the reduced recombination. Se alloying CdTe absorber brings a lot of potential to the solar cell industry. The optical properties and electronic structures of this CdTeSe/CdTe composite absorber solar cell are discussed in detail by simulation. The V OC and cell efficiency ̞ are increased when a fully interdiffused CdTeSe composite absorber layer (100 nm) gets used because of the substantial inner grain photoconductivity. The functionality of the solar cell is significantly impacted as the thickness of CdSe grows. It has been observed that a residual photoinactive CdSe layer negatively affects solar performance. The photoinactive part of the FTO/CdTeSe interface becomes the photoactive part when a very thin layer of CdS is inserted into the FTO/CdTeSe layer. Since the reduced bandgap of the CdTe1-xSex layer reduces the solar cell VOC, a very thin CdS layer has been used between the FTO and the CdTe1-xSex layer to minimise the damage. In this case, the factors responsible for the highest I SC (0.363 Amp), V OC (0.6475), FF (78.8%) and conversion efficiency (18.39%) are discussed in the present study .
Impact of halogen-bonding interactions on M–X bond activation pathways: a perspective Sritama Maiti, Sreeja Maitra, Gopal Kanrar, Koushik Sarkar, Kausikisankar Pramanik, Sanjib Ganguly Crystengcomm, 2026 Halogen bonding (R–X⋯Y) is well studied in biology and materials, but its role in metal-mediated transformations has been rarely investigated. This perspective highlights recent advances in XB-driven metal–halogen bond activation.
Designed Synthesis of Amino-Azo-Quinoline and Their Nickel(II) Complexes: Molecular Structure, Electrochemistry and an Insight Into Their In Vitro Anti-Cancer Activities Srijita Naskar, Koushik Sarkar, Supriyo Halder, Bidisha Chatterjee, Debjeet Chakraborty, Arka Laha, Rahul Sharma, Arup Kumar Mitra, Kausikisankar Pramanik, Sanjib Ganguly Chemistry and Biodiversity, 2025 Amino‐quinolines are potential candidates that may provide some insight into the current chemotherapeutic research due to their demonstrated anti‐cancer activity. This led us to synthesize and explore a new amino‐azo‐quinoline ligand H2L 1 and its square planar nickel(II) complexes [Ni(HL) (OAc)], 2 and [Ni(HL)Cl], 3 and the structures were determined by Single Crystal X‐Ray Diffraction. Theoretical investigation of redox orbitals of the complexes discloses that the reduction process is due to ligand reduction whereas both metal and ligand are contributing towards oxidation. The anti‐cancer properties of the ligand and one of the nickel(II) complexes have been assessed by 3‐[4,5‐dimethylthiazol‐2‐yl]‐2,5‐diphenyltetrazolium bromide assay, cell migration along with the generation of reactive oxygen species using human epithelial cancer cell line cells. The ligand 1 and complex 3 have been found to show effective anti‐cancer activity and for the latter, it is more promising. This may be ascribed to the rigid and robust nature of square planar complex 3, which supports stronger binding with DNA than that of free ligands, possibly due to the flexible nature of the latter. This result has also been validated by molecular docking using nine conformers of the ligand and complex 3 via interaction with B‐DNA (PDB ID: 1BNA) where the binding affinity with the complex has been found to be stronger.
IntuitIQ - AI Driven Calculator Himesh Bhattacharjee, Debolina Saha, Arup Roy, Priyanka Bal, Koushik Sarkar, Sudipta Banerjee, Kanhaiya Sharma 2025 IEEE International Conference on Modern Electronics Devices and Intelligent Communication Systems Medcom 2025, 2025 This work proposes an AI Enabled Platform that uses Generative AI Models which is expected to solve mathematics, abstract question & diagrams. The platform guarantees that sophisticated natural language processing gives the user the right response to a query correctly timed. It also features a dynamic interface where users can describe the mathematical and logical problems through drawings or in words, and detailed step-by-step solutions will be generated accordingly. The platform employs an Optical Character Recognition, handwritten text, rough drawings and images parsing together with the textual judging. This makes it useful for the general public, independent of domains such as engineering and education. We can bring on educative problem-solving activities within the reach of a learner through this project, enhancing technology and user-level education. The goal of the project aims at bringing a solution to users who have difficulty accessing complex mathematical structures and who are willing to build Artificial Intelligence education software alongside this project.
Structures, magnetism, and oxygen evolution reaction (OER) of azidoisophthalate bridging Cu(II) and Co(II) coordination polymers Sabir Ahmed, Koushik Sarkar, Arnab Samanta, Chittaranjan Sinha Applied Organometallic Chemistry, 2024 Two newly derived coordination polymers of Cu(II) and Co(II), namely {[Cu(μ‐5‐AzIA)(Py)2]⋅[Cu(5‐AzIA)(Py)2(H2O)]}n (CP1) and {[Co(μ‐5‐AzIA)2(Py)4]⋅[Co(5‐AzIA)(Py)2]}n (CP2) (5‐AzIA2− = 5‐azidoisophthalate; Py = pyridine) are synthesized and structurally characterized by single‐crystal X‐ray diffraction (SXRD), powder X‐ray diffraction (PXRD), and Fourier transform infrared data. As evident from thermogravimetric data, CP1 loses coordinated water at 110°C and the final residue reaches at 530°C as CuO; CP2 is stable up to 150°C, and the final residue reaches at 415°C as Co2O3. 5‐AzIA2− serves as both chelating and monodentate carboxylate bridging ligand to the adjacent metal centers (Cu(II) in CP1 and Co(II) in CP2) to construct the CPs. The CPs form eight‐member carboxylato bridging, [M2(RCOO)2], and coordinate with Py rings and assemblage through π‐‐‐π interaction. The magnetic measurements of the CPs show antiferromagnetic super‐exchange properties. Interestingly, CP2 shows field‐induced magnetic ordering at a higher magnetic field at a temperature ̴ 2 K owing to the π•••π stacking between the flagging pyridine moieties. Oxygen evolution reaction (OER) shows excellent catalytic effectiveness of CP2 than CP1 with reference to standard RuO2 catalyst. The comparative catalytic activity of CP1 and CP2 was thoroughly investigated and well supported by Tafel slope, charge‐transfer resistance (Rct), and electrochemically active surface area calculation.
A Brief Review of TOPCon Solar Cell and its Future Perspectives Sudipta Banerjee, Koushik Sarkar, Himadri Sekhar Das, Heranmoy Maity, Ranjeet Vasant Bidwe 2024 IEEE International Conference on Communication Computing and Signal Processing Iicccs 2024, 2024 The utilization of poly-Si/SiOx structures for passivating contacts, commonly referred to as TOPCon (Tunnel Oxide Passivated Contacts), presents a significant opportunity to enhance the efficiency of crystalline silicon solar cells. Laboratory-scale implementations have achieved efficiencies exceeding 26%, while industrial-scale cells have demonstrated efficiencies surpassing 24%. The reported efficiency pertains to a larger wafer that includes metal fingers and bus-bars under full illumination and simulated conditions. This work shows that the device’s actual deployment is severely hampered by recombination losses in the emitter, which span surface, bulk and metal contacts. The historical evolution of such contact structures, which started decades ago, is summarized in this paper together with the state-of-the-art in both laboratory and industry settings to date.
Optimization of the window layer in CdTe solar cell Koushik Sarkar, Sanchari Mitra, Madhupi Das, Chandrika Mitra, Anwesha Choudhury, Subineet Roy 2017 4th International Conference on Opto Electronics and Applied Optics Optronix 2017, 2017
A post synthetically modified metal–organic framework as an efficient hydrogen evolution reaction catalyst in all pH conditions T Mondal, P Hota, K Sarkar, A Debnath, BK Shaw, SK Saha New Journal of Chemistry 47 (17), 8102-8110 , 2023 2023 Citations: 3
Diarylazooxime complex of cobalt (III): synthesis, structure, ligand redox, DFT calculations and spectral characteristics S Dinda, K Sarkar, BK Panda, K Pramanik, S Ganguly Transition Metal Chemistry 47 (1), 31-38 , 2022 2022 Citations: 5
Structural Rationale towards Designing Coordination Polymer Based Metallogels Displaying Anti‐Cancer and Anti‐Bacterial Properties K Sarkar, HK Datta, S Ahmed, P Dastidar ChemistrySelect 6 (48), 13992-14004 , 2021 2021 Citations: 8
Influence of triazole substituents of bis-heteroleptic Ru (II) probes toward selective sensing of dihydrogen phosphate S Mondal, K Sarkar, P Ghosh Inorganic Chemistry 60 (12), 9084-9096 , 2021 2021 Citations: 16
Cu (II)‐Metallacryptands Self‐Assembled to Vesicular Aggregates Capable of Encapsulating and Transporting an Anticancer Drug Inside Cancer Cells P Biswas, K Sarkar, P Dastidar Macromolecular Bioscience 20 (6), 2000044 , 2020 2020 Citations: 5
Design and Synthesis of Zn II ‐Coordination Polymers Anchored with NSAIDs: Metallovesicle Formation and Multi‐drug Delivery S Bera, A Chowdhury, K Sarkar, P Dastidar Chemistry–An Asian Journal 15 (4), 503-510 , 2020 2020 Citations: 26
Self‐Assembly of Spherical Organic Molecules to Form Hollow Vesicular Structures in Water for Encapsulation of an Anticancer Drug and Its Release K Sarkar, S Ahmed, P Dastidar Chemistry–An Asian Journal 14 (11), 1992-1999 , 2019 2019 Citations: 4
Rational Approach Towards Designing Metallogels From a Urea‐Functionalized Pyridyl Dicarboxylate: Anti‐inflammatory, Anticancer, and Drug Delivery K Sarkar, P Dastidar Chemistry–An Asian Journal 14 (1), 194-204 , 2019 2019 Citations: 32
Synthesis, structure and phenoxazinone synthase-like activity of three unprecedented alternating Co II–Co III 1D chains S Ganguly, P Kar, M Chakraborty, K Sarkar, A Ghosh New Journal of Chemistry 43 (47), 18780-18793 , 2019 2019 Citations: 28
Supramolecular synthon approach in designing molecular gels for advanced therapeutics P Dastidar, R Roy, R Parveen, K Sarkar Advanced Therapeutics 2 (1), 1800061 , 2019 2019 Citations: 68
Rationally developed metallogelators derived from pyridyl derivatives of NSAIDs displaying anti-inflammatory and anticancer activities K Sarkar, S Khasimbi, S Mandal, P Dastidar ACS applied materials & interfaces 10 (36), 30649-30661 , 2018 2018 Citations: 28
Exfoliated Nanosheets of a Cu II Coordination Polymer Modulate Enzyme Activity of α‐Chymotrypsin K Sarkar, P Dastidar Chemistry–A European Journal 24 (44), 11297-11302 , 2018 2018 Citations: 8
Supramolecular Hydrogel Derived from a C 3 -Symmetric Boronic Acid Derivative for Stimuli-Responsive Release of Insulin and Doxorubicin K Sarkar, P Dastidar Langmuir 34 (2), 685-692 , 2018 2018 Citations: 22
Hand‐Ground Nanoscale Zn II ‐Based Coordination Polymers Derived from NSAIDs: Cell Migration Inhibition of Human Breast Cancer Cells M Paul, K Sarkar, J Deb, P Dastidar Chemistry–A European Journal 23 (24), 5736-5747 , 2017 2017 Citations: 30
Multifunctional single-layered vesicles derived from Cu (II)-Metal-Organic-Polyhedra K Sarkar, M Paul, P Dastidar Acta Cryst 70, C1287 , 2017 2017
Nanoscale Mn II ‐Coordination Polymers for Cell Imaging and Heterogeneous Catalysis K Sarkar, P Dastidar Chemistry–A European Journal 22 (52), 18963-18974 , 2016 2016 Citations: 11
Metallogels from coordination complexes, organometallic, and coordination polymers P Dastidar, S Ganguly, K Sarkar Chemistry–An Asian Journal 11 (18), 2484-2498 , 2016 2016 Citations: 123
Multifunctional single-layered vesicles derived from Cu (ii)-metal–organic-polyhedra K Sarkar, M Paul, P Dastidar Chemical Communications 52 (89), 13124-13127 , 2016 2016 Citations: 17
Metallogels Derived from Silver Coordination Polymers of C 3 ‐Symmetric Tris(pyridylamide) Tripodal Ligands: Synthesis of Ag Nanoparticles and Catalysis M Paul, K Sarkar, P Dastidar Chemistry–A European Journal 21 (1), 255-268 , 2015 2015 Citations: 52
MOST CITED SCHOLAR PUBLICATIONS
Metallogels from coordination complexes, organometallic, and coordination polymers P Dastidar, S Ganguly, K Sarkar Chemistry–An Asian Journal 11 (18), 2484-2498 , 2016 2016 Citations: 123
Supramolecular synthon approach in designing molecular gels for advanced therapeutics P Dastidar, R Roy, R Parveen, K Sarkar Advanced Therapeutics 2 (1), 1800061 , 2019 2019 Citations: 68
Metallogels Derived from Silver Coordination Polymers of C 3 ‐Symmetric Tris(pyridylamide) Tripodal Ligands: Synthesis of Ag Nanoparticles and Catalysis M Paul, K Sarkar, P Dastidar Chemistry–A European Journal 21 (1), 255-268 , 2015 2015 Citations: 52
Rational Approach Towards Designing Metallogels From a Urea‐Functionalized Pyridyl Dicarboxylate: Anti‐inflammatory, Anticancer, and Drug Delivery K Sarkar, P Dastidar Chemistry–An Asian Journal 14 (1), 194-204 , 2019 2019 Citations: 32
Hand‐Ground Nanoscale Zn II ‐Based Coordination Polymers Derived from NSAIDs: Cell Migration Inhibition of Human Breast Cancer Cells M Paul, K Sarkar, J Deb, P Dastidar Chemistry–A European Journal 23 (24), 5736-5747 , 2017 2017 Citations: 30
Synthesis, structure and phenoxazinone synthase-like activity of three unprecedented alternating Co II–Co III 1D chains S Ganguly, P Kar, M Chakraborty, K Sarkar, A Ghosh New Journal of Chemistry 43 (47), 18780-18793 , 2019 2019 Citations: 28
Rationally developed metallogelators derived from pyridyl derivatives of NSAIDs displaying anti-inflammatory and anticancer activities K Sarkar, S Khasimbi, S Mandal, P Dastidar ACS applied materials & interfaces 10 (36), 30649-30661 , 2018 2018 Citations: 28
Design and Synthesis of Zn II ‐Coordination Polymers Anchored with NSAIDs: Metallovesicle Formation and Multi‐drug Delivery S Bera, A Chowdhury, K Sarkar, P Dastidar Chemistry–An Asian Journal 15 (4), 503-510 , 2020 2020 Citations: 26
Supramolecular Hydrogel Derived from a C 3 -Symmetric Boronic Acid Derivative for Stimuli-Responsive Release of Insulin and Doxorubicin K Sarkar, P Dastidar Langmuir 34 (2), 685-692 , 2018 2018 Citations: 22
Multifunctional single-layered vesicles derived from Cu (ii)-metal–organic-polyhedra K Sarkar, M Paul, P Dastidar Chemical Communications 52 (89), 13124-13127 , 2016 2016 Citations: 17
Influence of triazole substituents of bis-heteroleptic Ru (II) probes toward selective sensing of dihydrogen phosphate S Mondal, K Sarkar, P Ghosh Inorganic Chemistry 60 (12), 9084-9096 , 2021 2021 Citations: 16
Nanoscale Mn II ‐Coordination Polymers for Cell Imaging and Heterogeneous Catalysis K Sarkar, P Dastidar Chemistry–A European Journal 22 (52), 18963-18974 , 2016 2016 Citations: 11
Structural Rationale towards Designing Coordination Polymer Based Metallogels Displaying Anti‐Cancer and Anti‐Bacterial Properties K Sarkar, HK Datta, S Ahmed, P Dastidar ChemistrySelect 6 (48), 13992-14004 , 2021 2021 Citations: 8
Exfoliated Nanosheets of a Cu II Coordination Polymer Modulate Enzyme Activity of α‐Chymotrypsin K Sarkar, P Dastidar Chemistry–A European Journal 24 (44), 11297-11302 , 2018 2018 Citations: 8
Diarylazooxime complex of cobalt (III): synthesis, structure, ligand redox, DFT calculations and spectral characteristics S Dinda, K Sarkar, BK Panda, K Pramanik, S Ganguly Transition Metal Chemistry 47 (1), 31-38 , 2022 2022 Citations: 5
Cu (II)‐Metallacryptands Self‐Assembled to Vesicular Aggregates Capable of Encapsulating and Transporting an Anticancer Drug Inside Cancer Cells P Biswas, K Sarkar, P Dastidar Macromolecular Bioscience 20 (6), 2000044 , 2020 2020 Citations: 5
Self‐Assembly of Spherical Organic Molecules to Form Hollow Vesicular Structures in Water for Encapsulation of an Anticancer Drug and Its Release K Sarkar, S Ahmed, P Dastidar Chemistry–An Asian Journal 14 (11), 1992-1999 , 2019 2019 Citations: 4
A post synthetically modified metal–organic framework as an efficient hydrogen evolution reaction catalyst in all pH conditions T Mondal, P Hota, K Sarkar, A Debnath, BK Shaw, SK Saha New Journal of Chemistry 47 (17), 8102-8110 , 2023 2023 Citations: 3
Multifunctional single-layered vesicles derived from Cu (II)-Metal-Organic-Polyhedra K Sarkar, M Paul, P Dastidar Acta Cryst 70, C1287 , 2017 2017