Dey Atanu, Ali Junaid, Moorthy Shruti, Gonzalez Jessica Flores, Pointillart Fabrice, Singh Saurabh Kumar, Chandrasekhar Vadapalli
Department of Chemistry, Gandhi Institute of Technology and Management (GITAM), NH 207, Nagadenehalli, Doddaballapur Taluk, Bengaluru 561203, India.
Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad, 500 046, India.
Dalton Trans. 2023 Oct 24;52(41):14807-14821. doi: 10.1039/d3dt01769a.
We report three Co-based complexes with the general formula [Co(L)(X)] by changing the halide/pseudo-halide ions [X = NCSe (1SeCN); Cl (2Cl) and Br (3Br)]. The obtained and values confirm a distorted square pyramidal geometry around the Co ion in all these complexes. In these three complexes, the central Co ion is situated above the basal plane of the square pyramidal geometry. The extent of distortion from the ideal SPY-5 geometry differs upon changing the coordinating halide/pseudo-halide ion in these complexes. This essentially results in the alteration of the anisotropic parameter and hence impacts the magnetic properties in these complexes. This phenomenon has been corroborated with the aid of theoretical investigations. All these complexes display field-induced SIM behaviour with magnetic relaxation occurring through a combination of processes depending on the applied dc magnetic field values and dilution.
我们通过改变卤化物/拟卤化物离子[X = NCSe (1SeCN); Cl (2Cl) 和 Br (3Br)]报道了三种通式为[Co(L)(X)]的钴基配合物。所获得的 和 值证实了所有这些配合物中钴离子周围存在扭曲的四方锥几何构型。在这三种配合物中，中心钴离子位于四方锥几何构型的基面上方。改变这些配合物中的配位卤化物/拟卤化物离子时，与理想的SPY - 5几何构型的扭曲程度会有所不同。这实质上导致了各向异性参数 的改变，从而影响了这些配合物的磁性。借助理论研究证实了这一现象。所有这些配合物都表现出场诱导的单离子磁体行为，磁弛豫通过取决于所施加的直流磁场值和稀释度的多种过程的组合而发生。
