Assistant Professor
Department of Chemical Sciences
📍 5F2-AB1
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Research Area
Coordination Chemistry, Molecular Magnetism, Computational Chemistry
Research Interests
Molecular Magnetism: Our group research work mainly deals with the synthesis and modeling of spin-Hamiltonian parameters in transition metal, lanthanide, and radical-bridged coordination complexes using both experimental and computational tools to understand their molecular magnetic behavior. Certain mononuclear/polynuclear complexes are capable of retaining their magnetization even in the absence of a magnetic field which gives rise to magnetic hysteresis at a molecular level and an ability to act as magnets below their blocking temperature and these molecules are termed Single-Molecule Magnets (SMMs) or Single-Ion Magnets (SIMs). We also focus on Single-Molecule Toroics (SMTs), which are defined as molecules that display a toroidal magnetic state which can potentially be used in multiferroic materials. Both SMMs and SMTs have intriguing potential applications in memory storage devices, quantum computing, and spintronic devices.
We use X-ray diffractometer and SQUID magnetic instrumentation to characterize these magnetic complexes. To further understand the observed magnetic behavior of synthesized molecules, we employ both density functional theory (DFT) and ab initio methods using various quantum mechanics programs.
Heterogeneous catalysis: The main areas of catalysis are focusing on minimizing the environmental impacts while combusting fuels from automobile engines. Our group is searching for the three-way catalyst (TWC) of a car that exploits three reactions which include NO reduction, CO oxidation, and oxidation of unburnt hydrocarbons. We are adopting the computational approach to understand CO and NO adsorption and to intensively seek a suitable metal oxide surface for the investigation of the NO-CO reaction mechanism. We perform slab model calculations by spin-polarized DFT methods using the VASP program.
Since 2024 : International Committee member, ACMM.
Since May 2022 : Assistant Professor at IISER Mohali.
2017 - 2018 : Postdoctoral Research Associate, Texas A&M University, College Station, USA
2019 - 2020 : Postdoctoral Research Fellow, Institute for Molecular Science, Okazaki, Japan
2020 - 2021 : Postdoctoral Research Fellow, IIT Bombay, Mumbai, India
2021 - 2022 : JSPS Postdoctoral Research Fellow, Tokyo Metropolitan University, Tokyo, Japan
2012 - 2016 : Doctor of Philosophy (PhD) in Chemistry, IITB-Monash Research Academy, IIT Bombay, Mumbai, India
2009 - 2011 : Master of Science (M. Sc) in Chemistry from Department of Chemistry, The American College, Madurai, India
2006 - 2009 : Bachelor of Science (B. Sc) in Chemistry from Department of Chemistry, The American College, Madurai, India
Received Ramanujam Iyengar prize during B.Sc. for proficiency in Chemistry during the academic year of 2006-2007.
Received Best Poster award at the "NANO INDIA 2015" conference in Jan’2015 at Thanjavur, India.
Travel Grant awarded from IIT Bombay, to attend the 5th Asian Conference on Coordination Chemistry, Hong Kong in 201
Travel Grant awarded from IITB-Monash Research Academy, to attend the 5th European Conference on Molecular Magnetism at Zaragoza, Spain in 2015, and the 15th International Conference on Molecule-based Magnets, Sendai, Japan in 201
Best Collaborative Student award from IITB-Monash Research Academy, Mumbai on OSKAR night in August 2015.
Received the prestigious Excellence in PhD Research Award from IIT Bombay, India in August 2018.
Received the prestigious JSPS Postdoctoral Fellowship for Research in Japan (Standard) for two years in December 2020, Japan.
Travel Grant awarded by the Science and Engineering Research Board (SERB) under the ITS scheme, to attend the 9th Asian Conference on Coordination Chemistry (ACCC-9), Bangkok, Thailand.
Sriram Sundaresan, Julian Eppelsheimer, Esha Gera, Lukas Wiener, Luca Carrella, Kuduva R Vignesh and Eva Rentschler. A combined theoretical and experimental approach to determine the right choice of co-ligand to impart spin crossover in Fe (II) complexes based on 1, 3, 4-Oxadiazole ligands. Dalton Transactions, 2024.
Jayasree Kumar, Imon J Dutta, Kuduva R Vignesh and Kartik Chandra Mondal. Unique Hexanuclear Mixed Bimetallic MnIII2NiII4 Complex Possessing Both Jahn–Teller Tetragonally Elongated and Compressed MnIII Ions: Spin Frustration. Crystal Growth & Design 24(9):3786–3797, 2024.
Alexandros S Armenis, Vikram Vipanchi, Konstantinos N Pantelis, Lu\'ıs Cunha-Silva, Kuduva R Vignesh, Dimitris I Alexandropoulos and Theocharis C Stamatatos. Slow Magnetization Relaxation in a Family of Triangular $$CoIII2LnIII$$ Clusters: The Effect of Diamagnetic CoIII Ions on the LnIII Magnetic Dynamics. Chemistry–A European Journal 29(65):e202302337, 2023.
Deepanshu Chauhan, Kuduva R Vignesh, Abinash Swain, Stuart K Langley, Keith S Murray, Maheswaran Shanmugam and Gopalan Rajaraman. Exploiting Strong $$CrIII–DyIII$$ Ferromagnetic Exchange Coupling to Quench Quantum Tunneling of Magnetization in a Novel $$CrIII2DyIII3$$ Single-Molecule Magnet. Crystal Growth & Design 23(1):197–206, 2022.
Keith S Murray, Kuduva R Vignesh, Kieran Hymas and Alessandro Soncini. Introduction to Single-Molecule Toroics. In Single Molecule Toroics: Synthetic Strategies, Theory and Applications. Springer International Publishing Cham, 2022, pages 1–13.
Keith S Murray, Stuart K Langley, Kuduva R Vignesh, Gopalan Rajaraman, Kieran Hymas and Alessandro Soncini. Mixed df Block Single-Molecule Toroics. In Single Molecule Toroics: Synthetic Strategies, Theory and Applications. Springer International Publishing Cham, 2022, pages 15–66.
Nurul F Ghazali, Kuduva R Vignesh, Wasinee Phonsri, Keith S Murray, Peter C Junk, Glen B Deacon and David R Turner. Efficient synthetic route to heterobimetallic trinuclear complexes [Ln–Mn–Ln] and their single molecule magnetic properties. Dalton Transactions 51(48):18502–18513, 2022.
Soumalya Roy, Pooja Shukla, Raman Kumar, Subash Chandra Sahoo, Tapan K Pal, Amit Rajput, Julia Klak, Masahiko Hada, Kuduva R Vignesh and Sourav Das. Utilization of diamagnetic Zn (II) ion to boost the anisotropic nature of Ln (III) ion in heterodinuclear Zn (II)–Ln (III) single-molecule magnets. Applied Organometallic Chemistry 36(12):e6914, 2022.
Kuduva R Vignesh and Gopalan Rajaraman. Strategies to design single-molecule toroics using triangular $$Ln3$$ n motifs. ACS omega 6(48):32349–32364, 2021.
Abinash Swain, Robert Martin, Kuduva R Vignesh, Gopalan Rajaraman, Keith S Murray and Stuart K Langley. Enhancing the barrier height for magnetization reversal in 4d/4f Ru III2 Ln III2 “butterfly” single molecule magnets (Ln= Gd, Dy) via targeted structural alterations. Dalton Transactions 50(35):12265–12274, 2021.
Jared M Ashtree, Ivana Borilović, Kuduva R Vignesh, Abinash Swain, Sarah H Hamilton, Yasmin L Whyatt, Sophie L Benjamin, Wasinee Phonsri, Craig M Forsyth, Wolfgang Wernsdorfer and others. Tuning the Ferrotoroidic Coupling and Magnetic Hysteresis in Double-Triangle Complexes $$Dy3MIIIDy3$$ via the MIII-linker. European Journal of Inorganic Chemistry 2021(5):435–444, 2021.
Dimitris I Alexandropoulos, Kuduva R Vignesh, Haomiao Xie and Kim R Dunbar. Quinoxaline radical-bridged transition metal complexes with very strong antiferromagnetic coupling. Chemical Communications 56(64):9122–9125, 2020.
Haomiao Xie, Kuduva R Vignesh, Xuan Zhang and Kim R Dunbar. From spin-crossover to single molecule magnetism: Tuning magnetic properties of Co (ii) bis-ferrocenylterpy cations via supramolecular interactions with organocyanide radical anions. Journal of Materials Chemistry C 8(24):8135–8144, 2020.
Kuduva R Vignesh, Dimitris I Alexandropoulos, Haomiao Xie and Kim R Dunbar. Six-coordinate mononuclear dysprosium (iii) single-molecule magnets with the triphenylphosphine oxide ligand. Dalton Transactions 49(15):4694–4698, 2020.
Stuart K Langley, Kuduva R Vignesh, Tulika Gupta, Christopher Gartshore, Gopalan Rajaraman, Craig M Forsyth and Keith S Murray. New Examples of Triangular Terbium (III) and Holmium (III) and Hexagonal Dysprosium (III) Single Molecule Toroics. Dalton Transactions, 2019.
Dimitris I Alexandropoulos, Brian Dolinar, Haomiao Xie, Kuduva R Vignesh and Kim R Dunbar. A Co8 Metallacycle Stabilized by Double Anion-$\pi$ interactions. Chemical Communications, 2019.
Kuduva R Vignesh, Robert BC Martin, Gary Miller, Gopalan Rajaraman, Keith S Murray and Stuart K Langley. $$MnIII2LnIII2$$(Ln= Gd, La or Y) butterfly complexes: Ferromagnetic exchange observed between bis-$\mu$-alkoxo bridged manganese (III) ions. Polyhedron 170:508–514, 2019.
Dimitris I Alexandropoulos, Kuduva R Vignesh, Haomiao Xie and Kim R Dunbar. Switching on single-molecule magnet properties of homoleptic sandwich tris (pyrazolyl) borate dysprosium (iii) cations via intermolecular dipolar coupling. Dalton Transactions 48(28):10610–10618, 2019.
Stuart K Langley, Kuduva R Vignesh, Boujemaa Moubaraki, Gopalan Rajaraman and Keith S Murray. Oblate versus prolate electron density of lanthanide ions: A design criterion for engineering toroidal moments? A case study on $$LnIII6$$(Ln= Tb, Dy, Ho and Er) wheels. Chemistry–A European Journal 25(16):4156–4165, 2019.
Kuduva R Vignesh, Dimitris I Alexandropoulos, Brian S Dolinar and Kim R Dunbar. Hard versus soft: Zero-field dinuclear Dy (III) oxygen bridged SMM and theoretical predictions of the sulfur and selenium analogues. Dalton Transactions 48(9):2872–2876, 2019.
David K Kempe, Brian S Dolinar, Kuduva R Vignesh, Toby J Woods, Mohamed R Saber and Kim R Dunbar. A cyanide-bridged wheel featuring a seven-coordinate Mo (iii) center. Chemical communications 55(14):2098–2101, 2019.
Jin-Hua Wang, Kuduva R Vignesh, Jia Zhao, Zhao-Yang Li and Kim R Dunbar. Charge transfer and slow magnetic relaxation in a series of cyano-bridged Fe III4 M II2 (M= Fe II, Co II, Ni II) molecules. Inorganic Chemistry Frontiers 6(2):493–497, 2019.
Dimitris I Alexandropoulos, Kuduva R Vignesh, Theocharis C Stamatatos and Kim R Dunbar. Rare “Janus”-faced single-molecule magnet exhibiting intramolecular ferromagnetic interactions. Chemical Science 10(6):1626–1633, 2019.
Kelsey A Schulte, Kuduva R Vignesh and Kim R Dunbar. Effects of coordination sphere on unusually large zero field splitting and slow magnetic relaxation in trigonally symmetric molecules. Chemical Science 9(48):9018–9026, 2018.
Dimitris I Alexandropoulos, Kelsey A Schulte, Kuduva R Vignesh and Kim R Dunbar. Slow magnetic dynamics in a family of mononuclear lanthanide complexes exhibiting the rare cubic coordination geometry. Chemical communications 54(72):10136–10139, 2018.
Kuduva R Vignesh, Stuart K Langley, Christopher J Gartshore, Ivana Borilović, Craig M Forsyth, Gopalan Rajaraman and Keith S Murray. Rationalizing the sign and magnitude of the magnetic coupling and anisotropy in dinuclear manganese (III) complexes. Dalton Transactions 47(34):11820–11833, 2018.
Stuart K Langley, Kuduva R Vignesh, Kerey Holton, Sophie Benjamin, Gary Hix, Wasinee Phonsri, Boujemaa Moubaraki, Keith S Murray and Gopalan Rajaraman. Mononuclear Dysprosium (III) Complexes with Triphenylphosphine Oxide Ligands: Controlling the Coordination Environment and Magnetic Anisotropy. Inorganics 6(2):61, 2018.
Dimitris I Alexandropoulos, Kuduva R Vignesh, Brian S Dolinar and Kim R Dunbar. End-to-end azides as bridging ligands in lanthanide coordination chemistry: Magnetic and magnetocaloric properties of tetranuclear Ln4 (Ln= Gd, Dy) complexes exhibiting a rare rhombus topology. Polyhedron 151:255–263, 2018.
Kuduva R Vignesh, Stuart K Langley, Boujemaa Moubaraki, Keith S Murray and Gopalan Rajaraman. Understanding the mechanism of magnetic relaxation in pentanuclear $$MnIVMnIII2LnIII2$$ single-molecule magnets. Inorganic Chemistry 57(3):1158–1170, 2018.
Brian S Dolinar, Dimitris I Alexandropoulos, Kuduva R Vignesh, Tia’Asia James and Kim R Dunbar. Lanthanide triangles supported by radical bridging ligands. Journal of the American Chemical Society 140(3):908–911, 2018.
Kuduva R Vignesh, Stuart K Langley, Abinash Swain, Boujemaa Moubaraki, Marko Damjanović, Wolfgang Wernsdorfer, Gopalan Rajaraman and Keith S Murray. Slow Magnetic Relaxation and Single-Molecule Toroidal Behaviour in a Family of Heptanuclear $$CrIIILnIII6$$(Ln= Tb, Ho, Er) Complexes. Angewandte Chemie Int. ed., 2017.
Apoorva Upadhyay, Kuduva R Vignesh, Chinmoy Das, Saurabh Kumar Singh, Gopalan Rajaraman and Maheswaran Shanmugam. Influence of the ligand field on the slow relaxation of magnetization of unsymmetrical monomeric lanthanide complexes: synthesis and theoretical studies. Inorganic chemistry 56(22):14260–14276, 2017.
Kuduva R Vignesh, Alessandro Soncini, Stuart K Langley, Wolfgang Wernsdorfer, Keith S Murray and Gopalan Rajaraman. Ferrotoroidic Ground State in a Heterometallic CrIIIDyIII6 Complex Displaying Slow Magnetic Relaxation. Nature Communications 8:1023, 2017.
Toby J Woods, Heather D Stout, Brian S Dolinar, Kuduva R Vignesh, Maria F Ballesteros-Rivas, Catalina Achim and Kim R Dunbar. Strong ferromagnetic exchange coupling mediated by a bridging tetrazine radical in a dinuclear nickel complex. Inorganic Chemistry 56(20):12094–12097, 2017.
Dimitris I Alexandropoulos, Brian S Dolinar, Kuduva R Vignesh and Kim R Dunbar. Putting a new spin on supramolecular metallacycles: Co3 triangle and Co4 square bearing tetrazine-based radicals as bridges. Journal of the American Chemical Society 139(32):11040–11043, 2017.
Corey P Burns, Branford O Wilkins, Courtney M Dickie, Trevor P Latendresse, Larry Vernier, Kuduva R Vignesh, Nattamai S Bhuvanesh and Michael Nippe. A comparative study of magnetization dynamics in dinuclear dysprosium complexes featuring bridging chloride or trifluoromethanesulfonate ligands. Chemical communications 53(60):8419–8422, 2017.
Wasinee Phonsri, David S Macedo, Kuduva R Vignesh, Gopalan Rajaraman, Casey G Davies, Guy NL Jameson, Boujemaa Moubaraki, Jas S Ward, Paul E Kruger, Guillaume Chastanet and others. Halogen substitution effects on N2O Schiff base ligands in unprecedented abrupt FeII spin crossover complexes. Chemistry–A European Journal 23(29):7052–7065, 2017.
Kuduva R Vignesh, Stuart K Langley, Keith S Murray and Gopalan Rajaraman. Quenching the Quantum Tunneling of Magnetization in Heterometallic Octanuclear $$TMIII4DyIII4$$(TM= Co and Cr) Single-Molecule Magnets by Modification of the Bridging Ligands and Enhancing the Magnetic Exchange Coupling. Chemistry–A European Journal 23(7):1654–1666, 2017.
Kuduva R Vignesh, Stuart K Langley, Keith S Murray and Gopalan Rajaraman. Exploring the influence of diamagnetic ions on the mechanism of magnetization relaxation in $$CoIII2LnIII2$$(Ln= Dy, Tb, Ho)“butterfly” complexes. Inorganic Chemistry 56(5):2518–2532, 2017.
Kuduva R Vignesh, Stuart K Langley, Christopher J Gartshore, Boujemaa Moubaraki, Keith S Murray and Gopalan Rajaraman. What Controls the Magnetic Exchange and Anisotropy in a Family of Tetranuclear $$Mn2IIMn2III$$ Single-Molecule Magnets?. Inorganic Chemistry 56(4):1932–1949, 2017.
Saurabh Kumar Singh, Kuduva R Vignesh, Velloth Archana and Gopalan Rajaraman. Theoretical insights into the origin of magnetic exchange and magnetic anisotropy in $$Re IV–M II$$(M= Mn, Fe, Co, Ni and Cu) single chain magnets. Dalton Transactions 45(19):8201–8214, 2016.
Kuduva R Vignesh, Stuart K Langley, Boujemaa Moubaraki, Keith S Murray and Gopalan Rajaraman. Large hexadecametallic $$MnIII–LnIII$$ wheels: Synthesis, structural, magnetic, and theoretical characterization. Chemistry–A European Journal 21(46):16364–16369, 2015.
Kuduva R Vignesh, Stuart K Langley, Keith S Murray and Gopalan Rajaraman. What Controls the Magnetic Exchange Interaction in Mixed-and Homo-Valent Mn7 Disc-Like Clusters? A Theoretical Perspective. Chemistry–A European Journal 21(7):2881–2892, 2015.
Lea Fohlmeister, Kuduva R Vignesh, Florian Winter, Boujemaa Moubaraki, Gopalan Rajaraman, Rainer Pöttgen, Keith S Murray and Cameron Jones. Neutral diiron (III) complexes with Fe 2 ($\mu$-E) 2 (E= O, S, Se) core structures: reactivity of an iron (I) dimer towards chalcogens. Dalton Transactions 44(4):1700–1708, 2015.
Marc Schmidt, Dennis Wiedemann, Boujemaa Moubaraki, Nicholas F Chilton, Keith S Murray, Kuduva R Vignesh, Gopalan Rajaraman and Andreas Grohmann. Iron (II) Complexes of Two Amine/Imine N5 Chelate Ligands Containing a 1, 4-Diazepane Core–To Crossover or Not To Crossover. European Journal of Inorganic Chemistry 2013(5-6):958–967, 2013.
Hayley S Scott, Tamsyn M Ross, Nicholas F Chilton, Ian A Gass, Boujemaa Moubaraki, Guillaume Chastanet, Nicolas Paradis, Jean-François Lètard, Kuduva R Vignesh, Gopalan Rajaraman and others. Crown-linked dipyridylamino-triazine ligands and their spin-crossover iron (II) derivatives: magnetism, photomagnetism and cooperativity. Dalton Transactions 42(47):16494–16509, 2013.