Publications

49) "Synthesis, characterization, magnetic and theoretical studies on Fe(II) spin-crossover complex based on 4-cyclohexyl-1,2,4-triazole"

M. A. Amin, E. Gera, K. R. Vignesh, I. Salitros, A. A. Soliman, J. COORD. CHEM., 2025, 78, 1515–1530. Article Link.

48) "New Family of Dinuclear Ni–Ln Complexes from Ternary Coordination by β-Diketonates around the Lanthanoids: Synthesis, Structures, and Magnetic Behavior with Theoretical Supports"

B. Dutta, T. Guizouarn, A. Gharu, F. Pointillart, K. R. Vignesh, D. Ray, Cryst. Growth Des., 2025, 25, 143-157. Article Link.

47) "Discriminating ferrotoroidic from antiferrotoroidic ground states using a 3d quantum spin sensor"

K. Hymas, A. Soncini, K. R. Vignesh, D. Chauhan, A. Swain, S. L. Benjamin, D. Borah, M. Shanmugam, W. Wernsdorfer, G. Rajaraman, S. K. Langley, K. S. Murray, npj Quantum Materials., 2024, 9, 106. Article Link.

46) "Theoretical Exploration of Single-Molecule Magnetic and Single-Molecule Toroic Behavior in Peroxide-Bridged Double-triangular {MII3LnIII3} (M = Ni, Cu and Zn; Ln = Gd, Tb and Dy) Complexes"

A. Gharu, K. R. Vignesh, Dalton Trans., 2024, 53, 13394-13408. (Added to quarterly HOT article collection) Article Link.

45) "Elevating the Performance of Heterometallic 3d/4f SMMs: The Role of Diamagnetic CoIII and ZnII Ions in Magnetization Dynamics" 

V. Vipanchi, K. R. Vignesh, A. S. Armenis, D. I. Alexandropoulos, T. C. Stamatatos, ChemPhysChem, 2024, e202400385. Article Link.

44) "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"                                                                                                                                                                                     

S. Sundaresan, J. Eppelsheimer, E. Gera, L. Wiener, L. M. Carrella, K. R. Vignesh, Eva Rentschler, Dalton Trans., 2024, 53, 10303-10317. Article Link.

43) "A Unique Hexanuclear Mixed Bimetallic MnIII2NiII4 Complex Possessing Both Jahn-Teller Tetragonally Elongated and Compressed MnIII Ions: Spin Frustration"  

J. Kumar, I. J. Dutta, K. R. Vignesh, K. C. Mondal, Cryst. Growth Des., 2024, 24, 3786–3797. Article Link.

42) "Slow Magnetization Relaxation in a Family of Triangular {CoIII2LnIII} Clusters: The Effect of Diamagnetic CoIII Ions on the LnIII Magnetic Dynamics"

A. S. Armenis, V. Vipanchi, K.N. Pantelis, L. Cunha-Silva, K. R. Vignesh, D. I. Alexandropoulos, T. C. Stamatatos, Chem. Eur. J., 2023, 29, e202302337. Article Link.

41) " Exploiting Strong {CrIII–DyIII} Ferromagnetic Exchange Coupling to Quench Quantum Tunneling of Magnetization in a Novel {CrIII2DyIII3} Single-Molecule Magnet"

D. Chauhan, K. R. Vignesh, A. Swain, S. K. Langley, K. S. Murray, M. Shanmugam, G. Rajaraman, Cryst. Growth Des., 2023, 23, 197–206. Article Link.

40) Efficient synthetic route to heterobimetallic trinuclear complexes [Ln–Mn–Ln] and their single molecule magnetic properties. N. F Ghazali, K. R. Vignesh, W. Phonsri, K. S. Murray, P. C. Junk, G. B. Deacon, D. R. Turner, Dalton Trans., 2022, 51, 18502–18513. Article Link.

39) "Utilization of diamagnetic Zn(II) ion to boost the anisotropic nature of Ln(III) ion in heterodinuclear Zn(II)-Ln(III) SMMs"

S. Roy, P. Shukla, R. Kumar, S. C. Sahoo, T. K. Pal, A. Rajput, J. Klak, M. Hada, K. R. Vignesh, Sourav Das, Appl. Organometal. Chem., 2022, 36, e6914. Article Link.

38) "Strategies to Design Single-Molecule Toroics Using Triangular {Ln3}n Motifs"

K. R. Vignesh, G. Rajaraman, ACS Omega, 2021, 6, 32349–32364. Article Link.

37) "Enhancing the barrier height for magnetization reversal in 4d/4f RuIII2LnIII2 “butterfly” single-molecule magnets (Ln = Gd, Dy) via targeted structural alterations"

A. Swain, R. Martin, K. R. Vignesh, G. Rajaraman, K. S. Murray, S. K. Langley, Dalton Trans., 2021, 50, 12265–12274. Article Link.

36) "Tuning the Ferrotoroidic Coupling and Magnetic Hysteresis in Double-triangle Complexes {Dy3MIIIDy3} via the MIII-linker"

J. M. Ashtree, I. Borilovic, K. R. Vignesh, A. Swain, S. H. Hamilton, Y. L. Whyatt, S. L. Benjamin, W. Phonsri, C. M. Forsyth, W. Wernsdorfer, A. Soncini, G. Rajaraman, S. K. Langley, K. S. Murray, Eur. J. Inorg. Chem., 2021, 435–444. Article Link.

35) "Quinoxaline radical-bridged transition metal complexes with very strong antiferromagnetic coupling"

D. I. Alexandropoulos, K. R. Vignesh, H. Xie, K. R. Dunbar, Chem. Commun., 2020, 56, 9122–9125. Article Link.

34) "From Spin-Crossover to Single Molecule Magnetism: Tuning Magnetic Properties of Co(II) bis-ferrocenylterpy Cations via Supramolecular Interactions with Organocyanide Radical Anions"

H. Xie, K. R. Vignesh, X. Zhang, K. R. Dunbar, J. Mat. Chem. C, 2020, 8, 8135–8144. Article Link.

33) "Six-Coordinate Mononuclear Dysprosium (III) Single-Molecule Magnets with the Triphenyl-phosphine oxide ligands"

K. R. Vignesh, D. I. Alexandropoulos, H. Xie, K. R. Dunbar, Dalton Trans., 2020, 49, 4694–4698. Article Link.

32) "New Examples of Triangular Terbium(III) and Holmium(III) and Hexagonal Dysprosium(III) Single Molecule Toroics"

S. K. Langley, K. R. Vignesh, T. G. Gupta, C. J. Gartshore, G. Rajaraman, K. S. Murray, Dalton Trans., 2019, 48, 15657–15667. Article Link.

31) "A Co8 Metallocycle Stabilized by Double Anion-pi interactions"

D. I. Alexandropoulos, B. S. Dolinar, H. Xie, K. R. Vignesh, K. R. Dunbar, Chem. Commun., 2019, 55, 12356–12359. Article Link.

30) "{MnIII2LnIII2} (Ln = Gd, La or Y) butterfly complexes: Ferromagnetic exchange observed between bis-μ-alkoxo bridged manganese(III) ions"

K. R. Vignesh, R. Martin, G. Miller, G. Rajaraman, K.S. Murray, S. K. Langley, Polyhedron, 2019, 170, 508–514. Article Link.

29) "Switching on Single-Molecule Magnet Properties of Homoleptic Sandwich Tris(pyrazolyl)borate Dysprosium (III) Cations via Intermolecular Dipolar Coupling"

D. I. Alexandropoulos, K. R. Vignesh, H. Xie, K. R. Dunbar, Dalton Trans., 2019, 48, 10610–10618. Article Link.

28) "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"

K. R. Vignesh, S. K. Langley, B. Moubaraki, G. Rajaraman, K.S. Murray, Chem. Eur. J., 2019, 25, 4156 – 4165. Article Link.

27) "Hard versus soft: zero-field dinuclear Dy(III) oxygen bridged SMM and theoretical predictions of the sulfur and selenium analogues"

K. R. Vignesh, D. I. Alexandropoulos, B. S. Dolinar, K. R. Dunbar, Dalton Trans., 2019, 48, 2872–2876. Article Link.

26) "A Cyanide-Bridged Wheel Featuring a Seven-Coordinate Mo (III) Center"

D. K. Kempe, B. S. Dolinar, K. R. Vignesh, T. J. Woods, M. Saber, K. R. Dunbar, Chem. Commun., 2019, 55, 2098–2101. Article Link.

25) "Charge transfer and slow magnetic relaxation in a series of cyano-bridged FeIII4MII2 (M = FeII, CoII, NiII) molecules"

J-H. Wang, K. R. Vignesh, J. Zhao, Z-Y. Li, K. R. Dunbar, Inorg. Chem. Front., 2019, 6, 493–497. Article Link.

24) "Rare Janus-Faced {FeII7} Single-Molecule Magnet Exhibiting Intramolecular Ferromagnetic Interactions"

D. I. Alexandropoulos, K. R. Vignesh, T. C. Stamatatos, K. R. Dunbar, Chem. Sci., 2019, 10, 1626–1633.  Article Link.

23) "Effects of Coordination Sphere on Unusually Large Zero-field Splitting and Slow Magnetic Relaxation in Trigonally Symmetric Molecules"

K. Schulte, K. R. Vignesh, K. R. Dunbar, Chem. Sci., 2018, 9, 9018–9026. Article Link.

22) "Slow Magnetic Dynamics in a Family of Mononuclear Lanthanide Complexes Exhibiting the Rare Cubic Coordination Geometry"

D. I. Alexandropoulos, K. Schulte, K. R. Vignesh, K. R. Dunbar, Chem. Commun., 2018, 54, 10136–10139. Article Link.

21) "Rationalizing the Sign and Magnitude of the Magnetic Coupling and Anisotropy in Dinuclear Mn(III) complexes"

K. R. Vignesh, S. K. Langley, C. J. Gartshore, I. Borilović, C. M. Forsyth, K. S. Murray, G. Rajaraman, Dalton Trans., 2018, 47, 11820–11833. Article Link.

20) "Mononuclear Dysprosium (III) Complexes with Triphenylphosphine Oxide Ligands: Controlling the Coordination Environment and Magnetic Anisotropy"

S. K. Langley, K. R. Vignesh, K. Holton, S. Benjamin, G. B. Hix, W. Phonsri, B. Moubaraki, K.S. Murray, G. Rajaraman, Inorganics, 2018, 6, 61. Article Link.

19) "End-to-end azides as bridging ligands in lanthanide (III) coordination chemistry: Magnetic and Magnetocaloric Properties of Tetranuclear Ln4 (Ln = Gd, Dy) complexes exhibiting a rare rhombus topology"

D. I. Alexandropoulos, K. R. Vignesh, B. S. Dolinar, K. R. Dunbar, Polyhedron, 2018, 151, 255–263. Article Link.

18) "Lanthanide Triangles Supported by Radical Bridging Ligands"

B. S. Dolinar, D. I. Alexandropoulos, K. R. Vignesh, Tia’Asia James, K. R. Dunbar, J. Am. Chem. Soc., 2018, 140, 908–911. Article Link.

17) "Understanding the Mechanism of Magnetic Relaxation in Pentanuclear {MnIVMnIII2LnIII2} Single-Molecule Magnets"

K. R. Vignesh, S. K. Langley, B. Moubaraki, K.S. Murray, G. Rajaraman, Inorg. Chem., 2018, 57, 1158–1170. Article Link.

16) "Slow Magnetic Relaxation and Single-Molecule Toroidal Behaviour in a Family of Heptanuclear {CrIIILnIII6} (Ln = Tb, Ho, and Er) Complexes"

K. R. Vignesh, S. K. Langley, A. Swain, B. Moubaraki, M. Damjanovic, W. Wernsdorfer, G. Rajaraman, K. S. Murray, Angew. Chem. Int. Ed., 2018, 57, 779–784. Article Link.

15) "Influence of the Ligand Field on Slow Relaxation of Magnetization of Unsymmetrical Monomeric Lanthanide Complexes: Synthesis and Theoretical Studies"

A. Upadhyay, K. R. Vignesh, C. Das, S. K. Singh, G. Rajaraman, M. Shanmugam, Inorg. Chem., 2017, 56, 14260–14276. Article Link.

14) "Strong Ferromagnetic Exchange Coupling Mediated by a Bridging Tetrazine Radical in a Dinuclear Nickel Complex"

T. J. Woods, H. D. Stout, B. S. Dolinar, K. R. Vignesh, M. F. Ballesteros-Rivas, C. Achim, K. R. Dunbar, Inorg. Chem., 2017, 56, 12094–12097. Article Link.

13) "Putting a New Spin on Supramolecular Metallacycles: Co3 Triangle and Co4 Square Bearing Tetrazine-Based Radicals as Bridges"

D. I. Alexandropoulos, B. S. Dolinar, K. R. Vignesh, K. R. Dunbar, J. Am. Chem. Soc., 2017, 139, 11040–11043. Article Link.

12) "A Comparative Study of Magnetization Dynamics in Dinuclear Dysprosium Complexes Featuring Bridging Chloride or Trifluoromethanesulfonate Ligands"

C. P. Burns, B. Wilkins, C. M. Dickie, T. P. Latendresse, L. Vernier, K. R. Vignesh, N. S. Bhuvanesh, M. Nippe, Chem. Commun., 2017, 53, 8419–8422. Article Link.

11) "Ferrotoroidic Ground State in a Heterometallic {CrIIIDyIII6} Complex Displaying Slow Magnetic Relaxation"

K. R. Vignesh, A. Soncini, S. K. Langley, K. S. Murray, W. Wernsdorfer, G. Rajaraman, Nat. Comm., 2017, 8, 1023. Article Link.

10) "Halogen Substitution Effects on N2O Schiff base Ligands in Unprecedented Abrupt Fe(II) Spin Crossover Complexes"

W. Phonsri, D. S. Macedo, K. R. Vignesh, G. Rajaraman, C. G. Davies, G. N. L. Jameson, B. Moubaraki, J. S. Ward, P. E. Kruger, G. Chastanet, K. S. Murray, Chem. Eur. J, 2017, 23, 7052–7065. Article Link.

9) "Exploring the Influence of Diamagnetic Ions on the Mechanism of Magnetization Relaxation in {CoIII2LnIII2} (Ln = Dy, Tb and Ho) Butterfly Complexes"

K. R. Vignesh, S. K. Langley, K.S. Murray, G. Rajaraman, Inorg. Chem., 2017, 56, 2518−2532. Article Link.

8) "What Controls the Magnetic Exchange and Anisotropy in a Family of Tetranuclear {Mn2IIMn2III} Single-Molecule Magnets?"

K. R. Vignesh, S. K. Langley, C. J. Gartshore, B. Moubaraki, K.S. Murray, G. Rajaraman, Inorg. Chem., 2017, 56, 1932−1949. Article Link.

7) "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"

K. R. Vignesh, S. K. Langley, K.S. Murray, G. Rajaraman, Chem. Eur. J, 2017, 21, 1654−1666. Article Link.

6) "Theoretical Insights into the Origin of Magnetic Exchange and Magnetic Anisotropy in {ReIV-MII} (M=Mn, Fe, Co, Ni and Cu) Single Chain Magnets"

K. R. Vignesh, S. K. Singh, V. Archana, G. Rajaraman, Dalton Trans., 2016, 45, 8201– 8214. Article Link.

5) "Large Hexadecametallic {MnIII–LnIII} Wheels: Synthesis, Structural, Magnetic, and Theoretical Characterization"

K. R. Vignesh, S. K. Langley, B. Moubaraki, K.S. Murray, G. Rajaraman, Chem. Eur. J, 2015, 21, 16364–16369. Article Link.

4) "Neutral diiron(III) complexes with Fe2(μ-E)2 (E = O, S, Se) core structures: reactivity of an iron(I) dimer towards chalcogens" 

L. Fohlmeister, K. R. Vignesh, F. Winter, B. Moubaraki, G. Rajaraman, R. Pottgen, K. S. Murray, C. Jones, Dalton Trans., 2015, 44, 1700−1708. Article Link.

3) "What Controls the Magnetic Exchange Interaction in Mixed- and Homo-Valent Mn7 Disc-Like Clusters? A Theoretical Perspective"

K. R. Vignesh, S. K. Langley, K.S. Murray, G. Rajaraman, Chem. Eur. J, 2015, 21, 2881−2892. Article Link.

2) "Crown-linked dipyridylamino-triazine ligands and their spin-crossover iron(II) derivatives: magnetism, photomagnetism and cooperativity"

H. S. Scott, T. M. Ross, N. F. Chilton, I. A. Gass, B. Moubaraki, G. Chastanet, N. Paradis, J.F. Letard, K. R. Vignesh, G. Rajaraman, S. R. Batten, K. S. Murray, Dalton Trans., 2013, 42, 16494−16509. Article Link.

1) "Iron(II) Complexes of Two amine/imine N5 chelate ligands Containing a 1,4-Diazepane Core – To Crossover or Not to Crossover"

M. Schmidt, D. Wiedemann, B. Moubaraki, N. F. Chilton, K. S. Murray, K. R. Vignesh, G. Rajaraman, A. Grohmann, Eur. J. Inorg. Chem., 2013, 958−967. Article Link.

1) "Chapter 1: Introduction to Single Molecule Toroics" in "Single Molecule Toroics: Synthetic Strategies, Theory and Applications"

K. S. Murray, K. R. Vignesh, K. Hymas, A. Soncini, Springer, 2022. Book Link.

2) "Chapter 2: Mixed d-f-block Single Molecule Toroics" in "Single Molecule Toroics: Synthetic Strategies, Theory and Applications"

K. S. Murray, S. K. Langley, K. R. Vignesh, G. Rajaraman, K. Hymas, A. Soncini, Springer, 2022. Book Link.