0000000001299102
AUTHOR
Anik Bhattacharyya
Synthesis, characterization and self-assembly of three dicyanamide bridged polynuclear copper(II) complexes with N2O donor tridentate Schiff bases as blocking ligands
Three copper(II) complexes [Cu(L1)(μ1,5-dca)]n (1), [Cu(L2)(μ1,5-dca)]n (2) and [Cu(L3)(μ1,5-dca)]n (3) [where HL1 = (1-(2-(dimethylamino)ethylimino)ethyl) naphthalene-1-ol, HL2 = (1-(2-(methylamino)ethylimino)ethyl) naphthalene-1-ol and HL3 = (1-(2-(ethylamino)ethylimino)ethyl)naphthalene-1-ol] have been synthesized and characterized by elemental analysis, IR and UV–Vis spectroscopy. The structure of each complex has been confirmed by single-crystal X-ray diffraction studies. In all three complexes, copper(II) centres are bridged by dicyanamide in end to end fashion. Complexes 1 and 2 are zigzag polymers, whereas complex 3 is a helical one. The weak forces like C–H⋯π and π⋯π interactions i…
Field-induced ferromagnetism due to magneto-striction in 1-D helical chains
Two homochiral copper(II) helices, [Cu(μ1,3-N3)(L1)]n (1) and [Cu(μ1,3-NCO)(L2)]n (2), with end-to-end pseudohalide bridges, were synthesized using two N2O donor achiral Schiff bases via spontaneous chiral resolution. Field-induced ferromagnetic ordering due to magneto-striction in homochiral 1-D helix [Cu(μ1,3-N3)(L1)]n (1) is reported for the first time. At temperatures below 5.5 K, under a magnetic field of 1 T, orthogonality between the magnetic orbitals of copper centres increases significantly due to the contraction of lattice parameters, giving rise to long-range ferromagnetic ordering in the helical chain. The magneto-dielectric results are also indicative of the observed magneto-st…
Formation of a novel ferromagnetic end-to-end cyanate bridged homochiral helical copper(ii) Schiff base complex via spontaneous symmetry breaking
A homochiral helical coordination polymer of copper(II) has been synthesized using achiral precursors via spontaneous symmetry breaking and has been confirmed by single crystal X-ray diffraction and solid-state CD spectroscopy. The variable temperature magnetic measurements indicate the presence of weak ferromagnetic exchange interactions mediated by end-to-end cyanate bridges (J = +0.12 cm(-1)).
Synthesis, characterization and magnetic study of two new octahedral iron(III) complexes with pendant zwitterionic Schiff bases
Two Schiff bases, HL1 [2-((3-(dimethylamino)propylimino)methyl)-5-bromophenol] and HL2 [2-((2-(diethylamino)ethylimino)methyl)-6-methoxyphenol], have been employed to prepare two new octahedral iron(III) complexes, [Fe(HL1)2(N3)2]ClO4·2H2O (1) and [Fe(HL2)2(NCS)2]ClO4·H2O (2). Both complexes are characterized by spectral and elemental analyses. Single crystal X-ray diffraction studies confirm their structures. In both complexes, Schiff bases are trapped in their zwitterionic forms and coordinated to iron(III) only through the imine nitrogen and phenoxo oxygen, i.e., they behave as bi-dentate ligands, keeping the remaining potential donor sites pendant. The measurement of χM vs. T for both c…
CCDC 1053244: Experimental Crystal Structure Determination
Related Article: Bikash Kumar Shaw, Mithun Das, Anik Bhattacharyya, Biswa Nath Ghosh, Susmita Roy, Prabhat Mandal, Kari Rissanen, Shouvik Chattopadhyay, Shyamal Kumar Saha|2016|RSC Advances|6|22980|doi:10.1039/C5RA27040E
CCDC 1019456: Experimental Crystal Structure Determination
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CCDC 1406302: Experimental Crystal Structure Determination
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CCDC 1406301: Experimental Crystal Structure Determination
Related Article: Subrata Jana, Anik Bhattacharyya, Biswa Nath Ghosh, Kari Rissanen, Santiago Herrero, Reyes Jiménez-Aparicio, Shouvik Chattopadhyay|2016|Inorg.Chim.Acta|453|715|doi:10.1016/j.ica.2016.09.005
CCDC 1024471: Experimental Crystal Structure Determination
Related Article: Bikash Kumar Shaw, Mithun Das, Anik Bhattacharyya, Biswa Nath Ghosh, Susmita Roy, Prabhat Mandal, Kari Rissanen, Shouvik Chattopadhyay, Shyamal Kumar Saha|2016|RSC Advances|6|22980|doi:10.1039/C5RA27040E
CCDC 1053245: Experimental Crystal Structure Determination
Related Article: Bikash Kumar Shaw, Mithun Das, Anik Bhattacharyya, Biswa Nath Ghosh, Susmita Roy, Prabhat Mandal, Kari Rissanen, Shouvik Chattopadhyay, Shyamal Kumar Saha|2016|RSC Advances|6|22980|doi:10.1039/C5RA27040E
CCDC 1053247: Experimental Crystal Structure Determination
Related Article: Bikash Kumar Shaw, Mithun Das, Anik Bhattacharyya, Biswa Nath Ghosh, Susmita Roy, Prabhat Mandal, Kari Rissanen, Shouvik Chattopadhyay, Shyamal Kumar Saha|2016|RSC Advances|6|22980|doi:10.1039/C5RA27040E
CCDC 1412636: Experimental Crystal Structure Determination
Related Article: Anik Bhattacharyya, Biswa Nath Ghosh, Kari Rissanen, Shouvik Chattopadhyay|2016|Polyhedron|117|138|doi:10.1016/j.poly.2016.04.037
CCDC 1053243: Experimental Crystal Structure Determination
Related Article: Bikash Kumar Shaw, Mithun Das, Anik Bhattacharyya, Biswa Nath Ghosh, Susmita Roy, Prabhat Mandal, Kari Rissanen, Shouvik Chattopadhyay, Shyamal Kumar Saha|2016|RSC Advances|6|22980|doi:10.1039/C5RA27040E
CCDC 1024473: Experimental Crystal Structure Determination
Related Article: Bikash Kumar Shaw, Mithun Das, Anik Bhattacharyya, Biswa Nath Ghosh, Susmita Roy, Prabhat Mandal, Kari Rissanen, Shouvik Chattopadhyay, Shyamal Kumar Saha|2016|RSC Advances|6|22980|doi:10.1039/C5RA27040E
CCDC 1409357: Experimental Crystal Structure Determination
Related Article: Anik Bhattacharyya, Biswa Nath Ghosh, Kari Rissanen, Shouvik Chattopadhyay|2016|Polyhedron|117|138|doi:10.1016/j.poly.2016.04.037
CCDC 1409356: Experimental Crystal Structure Determination
Related Article: Anik Bhattacharyya, Biswa Nath Ghosh, Kari Rissanen, Shouvik Chattopadhyay|2016|Polyhedron|117|138|doi:10.1016/j.poly.2016.04.037