Naupada Preeyanka - Ashoka University

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Naupada Preeyanka

Faculty Fellow, Department of Chemistry, Ashoka University

Ph.D., NISER, Bhubaneswar (PI: Dr. Moloy Sarkar)
Postdoc, Weizmann Institute of Science, (PI: Ron Naaman)
Postdoc, Weizmann Institute of Science, (PI: Amit Finkler)
naupada.preeyanka@ashoka.edu.in

Dr. Naupada Preeyanka is a physical chemist and researcher working at the interface of molecular spintronics, physical chemistry, nanomaterials, and bio-inspired molecular systems. She received her Ph.D. in Physical Chemistry from the National Institute of Science Education and Research (NISER), Bhubaneswar, where her doctoral research focused on exciton dynamics in inorganic–organic nanohybrid materials. Her doctoral research involved the synthesis and spectroscopic investigation of semiconductor quantum dots, metal nanoclusters, perovskite quantum dots, and their interactions with organic and biological systems.

Following her Ph.D., Dr. Preeyanka joined the Weizmann Institute of Science, Israel, as a postdoctoral researcher in Molecular Spintronics under the supervision of Prof. Ron Naaman. Her research focused on understanding electron spin transport through chiral molecules and biomolecules, with particular emphasis on the role of molecular chirality in spin-selective electron transmission.

She subsequently worked on magnetometry using nitrogen-vacancy (NV) centers in diamond, expanding her expertise in spin-related measurements and magnetic sensing. Her current research interests focus on spin-selective electron transfer and electron transport in chiral molecular and biomolecular systems, with particular emphasis on understanding the relationship between molecular structure, chirality, electron spin, and charge-transfer processes. Dr. Preeyanka’s broader research goal is to understand how electron spin and molecular chirality influence electron-transfer processes and to translate these fundamental insights into new approaches for spin-selective electrochemistry, molecular electronics, and functional spintronic devices.

1) Protein Conformation Governs Spin-Selective Electron Transmission. Naupada Preeyanka, Tapan Kumar Das, and Ron Naaman. J. Phys. Chem. Lett. 2025, 16, 6442-6446.(https://doi.org/10.1021/acs.jpclett.5c01495)
2) Spin-Selective Anisotropic Magnetoresistance in DNA Induced by Chirality. Tapan Kumar Das*, Naupada Preeyanka*, Suryakanta Mishra, Yutao Sang, and Claudio Fontanesi. Adv. Funct. Mater. 2025, 2425377. (*equal contribution) (https://doi.org/10.1002/adfm.202425377)
3) The Role of Electron Spin-Polarizability and Charge Dynamics in Protein Function. Pratik
Vyas, Kakali Santra, Naupada Preeyanka , Anu Gupta, Orit Weil-Ktorza, Qirong Zhu, Liam M
Longo, Jonas Fransson, Norman Metanis, Ron Naaman. J. Phys. Chem. B 2025, 129, 3978-3987.(https://doi.org/10.1021/acs.jpcb.5c01150).
4) Synthesis of Chemically Stable Chitosan Mediated Inorganic-Organic Lead Halide Perovskite and its Implication as a Hole Transfer System. Nilesh Monohar Sethi, Amlandeep Nayak, Kanha Ram Khator, Naupada Preeyanka , Debabrata Chakraborty, Satyaprasad P Senanayak and Moloy Sarkar. ChemNanoMat 2024, e202400355. (https://doi.org/10.1002/cnma.202400355)
5) Cobalt catalyzed decarbonylative ipso-C-C bond functionalization: Synthesis of Indole C-3 functionalized acyloins using 1,2-diketone. Shyam K. Banjare, Saista Afreen, Wang-Yeuk Kong, Wentao Guo, Tanmayee Nanda, Gopal Krushna Das Adhikari, Naupada Preeyanka , Dean J. Tantillo* and P. C. Ravikumar* J. Org. Chem. 2024, 89, 13, 9187–9197. (https://doi.org/10.1021/acs.joc.3c01845)
6) The importance of Spin-Polarized Charge Reorganization in the Catalytic Activity of D-Glucose Oxidase. Naupada Preeyanka , Qirong Zhu, Tapan Kumar Das, Ron Naaman. ChemPhysChem 2024, 25, e202400033.
Selected as front cover page ( https://doi.org/10.1002/cphc.202400033)
7) Assessing the Impact of Choline Chloride and Benzyltrimethylammonium Chloride-Based Deep Eutectic Solvents on the Structure and Conformational Dynamics of Bovine Serum Albumin: A Combined Steady-State, Time-Resolved Fluorescence and Fluorescence Correlation Spectroscopic Study. Sahadev Barik, Amita Mahapatra, Naupada Preeyanka, Moloy Sarkar. Phys. Chem. Chem. Phys., 2023,25, 20093-20108.
(https://doi.org/10.1039/D3CP01380D)
8) Understanding the Mechanism of Energy Transfer Process from Non-Plasmonic Fluorescence Bimetallic Nanoparticle to Plasmonic Gold Nanoparticle. Amit Akhuli, Naupada Preeyanka, Debabrata Chakraborty, Moloy Sarkar. Phys. Chem. Chem. Phys., 2023, 25, 17470-17481.(https://doi.org/10.1039/d3cp01447a)
9) Copper Nanoclusters as an Effective Enzyme Inhibitor: Role of Surface Chemistry on the Activity Modulation of -Chymotrypsin. Amit Akhuli, Debabrata Chakraborty, Naupada Preeyanka, Armul Simanchal Dora, Moloy Sarkar. ACS Appl. Nano Mater. 2023, 6, 6, 4910–4924. (https://doi.org/10.1021/acsanm.3c00631)
10) Energy Transfer Induced Enhanced Valley Splitting of Excitonic Emission of Inorganic CdTe@ZnS QDs in Presence of Organic J-Aggregates: A Spectroscopic Insight into the Strong Exciton (Inorganic)-Exciton (Organic) Coupling. Debabrata Chakraborty, Amit Akhuli, Naupada Preeyanka, Moloy Sarkar. J. Phys. Chem. C 2023, 127, 10, 5082–5089. (https://doi.org/10.1021/acs.jpcc.3c00769)
11) Temperature Dependent Ultrafast Solvation Dynamics of Choline Chloride-Based Deep Eutectic Solvent (DES) and Hydroxyl Functionalized Room Temperature Ionic Liquids (RTILs): Probing the Difference in Solvent Response between DES and RTILs. Sahadev Barik, Naupada Preeyanka, Manjari Chakraborty, and Moloy Sarkar*. Journal of Molecular Liquids 2022, 367, 120545. (https://doi.org/10.1016/j.molliq.2022.120545)
12) Realization of a Model-Free Pathway for Quantum Dot-Protein Interaction Beyond Classical Protein Corona or Protein Complex. Naupada Preeyanka, Amit Akhuli, Himani Dey, Debabrata Chakraborty, Abdur Rahaman, and Moloy Sarkar. Langmuir 2022, 38, 10704-10715. (https://doi.org/10.1021/acs.langmuir.2c01789)
13) Defect Mediated Charge Carrier Recombination of Zn-Ag-In-S Quantum Dot in presence of Naphthoquinone Derivatives: An Insight into the Interfacial Surface Dynamics. Naupada Preeyanka, Tanmay Goswami, Amit Akhuli, Ashis K. Dehury, and Moloy Sarkar*. J. Phys. Chem. C 2022, 126, 15838-15848.(https://doi.org/10.1021/acs.jpcc.2c05369)
14) Understanding the Interaction between Inorganic and Organic Excitonic Components of an Inorganic-Organic Nanohybrid Associate. Somnath Banerjee, Debabrata Chakraborty, Naupada Preeyanka, and Moloy Sarkar. ChemNanoMat 2022, e202200117 (1 of 12).(https://doi.org/10.1002/cnma.202200117)
15) A Simple and Effective Strategy for the Turn-off Detection of Highly Reactive Oxidative Species and Turn-on Detection of Antioxidants Using Fluorescent Copper Nanoclusters. Amit Akhuli, Naupada Preeyanka, Debabrata Chakraborty and Moloy Sarkar. ACS Appl. Nano Mater. 2022, 5, 4, 5826–5837. (https://doi.org/10.1021/acsanm.2c01005)
16) Enhancing the Stability and Photoluminescence Quantum Yield of CsPbX3 (X = Cl and Br) Perovskite Nanocrystals by Treatment with Imidazolium-Based Ionic Liquids through Surface Modification. Debabrata Chakraborty, Naupada Preeyanka, Amit Akhuli and Moloy Sarkar. J. Phys. Chem. C 2021, 125, 26652-26660. (https://doi.org/10.1021/acs.jpcc.1c08861)
17) Probing How Various Metal Ions Interact with the Surface of QDs:Implication of the Interaction Event on the Photophysics of QDs. Naupada Preeyanka and Moloy Sarkar. Langmuir 2021, 37, 6995-7007. (https://doi.org/10.1021/acs.langmuir.1c00548)
18) Interaction of Lysozyme with Monocationic and Dicationic Ionic Liquids: Toward Finding a Suitable Medium for Biomacromolecules. Mullah Muhaiminul Islam, Sahadev Barik, Naupada Preeyanka and Moloy Sarkar. J. Phys. Chem. B 2020, 124, 961-973. (https://dx.doi.org/10.1021/acs.jpcb.9b10270)
19) Highly efficient energy transfer from a water-soluble zinc silver indium sulphide quantum dot to organic J-aggregates. Naupada Preeyanka, Sudipta Seth and Moloy Sarkar. Phys. Chem. Chem. Phys., 2020, 22, 12772–12784. (https://doi.org/10.1039/D0CP01845G)
20) Highly Efficient Resonance Energy Transfer from Fluorescent Gold Nanoclusters to Dye J-aggregate in Inorganic – Organic Hybrid Associates. Somnath Banerjee, Naupada Preeyanka, Himani Dey, Sudipta Seth, Abdur Rahaman and Moloy Sarkar. J. Phys. Chem. C 2020, 124, 5009-5020. (https://dx.doi.org/10.1021/acs.jpcc.9b10347)
21) Striking Similarities in the Fluorescence Behavior between Carbon Dots and Ionic Liquids: Toward Understanding the Fluorescence Behavior of Carbon Dots. Subhasis Roy*, Naupada Preeyanka*, Debashis Majhi, Sudipta Seth, and Moloy Sarkar. J. Phys. Chem. C, 2018, 122, 12384 – 12394. (*equal contribution). (10.1021/acs.jpcc.8b03859)
22) Evidence of homo-FRET in quantum dot–dye heterostructured assembly. Samyabrata Saha, Debashis Majhi, Kalishankar Bhattacharyya, Naupada Preeyanka, Ayan Datta and Moloy Sarkar. Phys. Chem. Chem. Phys., 2018, 20, 9523 – 9535. (https://doi.org/10.1039/C7CP07233C)

1) Weizmann Postdoctoral Excellence Fellowship (March 2023- March 2025)
2) Qualified National Eligibility Test (CSIR-NET) in December 2017 with an All India Rank of 97.
3) Qualified Graduate Aptitude Test in Engineering (GATE) in 2015 with a score of 334
4) Awardee of Institute of Mathematics and Applications (IMA) Scholarship during M.Sc. (2013 – 2015)
5) B.Sc. 2nd Topper in Chemistry Honours, 2013
6) Awardee of Junior Cum Means Scholarship during B.Sc. (2010 – 2013)

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