0000000001307172
AUTHOR
Ritwik Modak
Slow Magnetic Relaxation in a Co 2 Dy Trimer and a Co 2 Dy 2 Tetramer
The combination of Co(III) and Dy(III) with a compartmental Schiff base ligand (H 3 L = 3-[(2-Hydroxy-3-methoxy-benzylidene)-amino]-propane-1,2-diol), presenting three different coordinating pockets, has allowed the synthesis of two novel Co(III)-Dy(III) complexes: [Co 2 Dy(HL) 4 ]NO 3 ·2CH 3 CN ( 1 ), a rare example of trinuclear linear Co III 2 Dy III complex (and the first with slow relaxation of magnetization in absence of a DC field) and [Co 2 Dy 2 (μ 3 -OH) 2 (HL) 2 (OAc) 6 ]·4.6H 2 O ( 2 ), the first tetranuclear Co III 2 Dy III 2 cluster with a rhomb-like structure where the Co(III) ions are connected along the short diagonal of the rhomb. 1 presents two different relaxation process…
Homo and heterometallic rhomb-like Ni4 and Mn2Ni2 complexes
Abstract Two new polynuclear complexes with hydroxyl-rich Schiff base ligand 3-[(2-Hydroxy-benzylidene)-amino]-propane-1,2-diol (H3L), namely [NiII2(HL)(H2L)(SCN)]2·DMF (1) and [MnIII2NiII2(HL)2(L)2] (2) have been synthesized and characterized by single crystal X-ray diffraction, elemental analyses, FTIR, UV–Vis spectroscopy and variable temperature magnetic susceptibility measurements. The X-ray refinements reveal that both compounds present defective rhomb-like dicubane central cores (Ni4 in 1 and Mn2Ni2 in 2). Magnetic susceptibility measurements indicate the presence of overall antiferromagnetic exchange interactions in 1 along the side connected by a N and O atoms (J1 = −43.6 cm−1) and…
Slow magnetic relaxation and water oxidation activity of dinuclear CoIICoIII and unique triangular CoIICoIICoIII mixed-valence complexes
Construction of efficient multifunctional materials is one of the greatest challenges of our time. We herein report the magnetic and catalytic characterization of dinuclear [CoIIICoII(HL1)2(EtOH)(H2O)]Cl·2H2O (1) and trinuclear [CoIIICoII2(HL2)2(L2)Cl2]·3H2O (2) mixed valence complexes. Relevant structural features of the complexes have been mentioned to correlate with their magnetic and catalytic properties. Unique structural features, especially in terms of significant distortions around the CoII centre(s), prompted us to test both spin–orbit coupling (SOC) and zero field splitting (ZFS) methodologies for the systems. The positive sign of D values has been established from X-band EPR spec…
CCDC 1981327: Experimental Crystal Structure Determination
Related Article: Ritwik Modak, Yeasin Sikdar, Carlos J. Gómez‐García, Samia Benmansour, Sudipta Chatterjee, Sanchita Goswami|2021|Chem.Asian J.|16|666|doi:10.1002/asia.202001468
CCDC 917971: Experimental Crystal Structure Determination
Related Article: Ritwik Modak, Yeasin Sikdar, Senjuti Mandal, Carlos J. Gómez-García, Samia Benmansour, Sudipta Chatterjee, Sanchita Goswami|2014|Polyhedron|70|155|doi:10.1016/j.poly.2013.12.031
CCDC 929633: Experimental Crystal Structure Determination
Related Article: Ritwik Modak, Yeasin Sikdar, Senjuti Mandal, Carlos J. Gómez-García, Samia Benmansour, Sudipta Chatterjee, Sanchita Goswami|2014|Polyhedron|70|155|doi:10.1016/j.poly.2013.12.031
CCDC 1985127: Experimental Crystal Structure Determination
Related Article: Ritwik Modak, Yeasin Sikdar, Carlos J. Gómez‐García, Samia Benmansour, Sudipta Chatterjee, Sanchita Goswami|2021|Chem.Asian J.|16|666|doi:10.1002/asia.202001468