Solid state mononuclear divalent nickel spin crossover complexes

Abstract

Spin crossover complexes containing 3d4-3d7 transition metal ions with tunable electronic configurations in appropriate ligand field environments are extensively investigated. On the contrary, the development of 3d8 divalent nickel displaying...

Structural studies into the spin crossover behaviour of Fe(abpt)2(NCS)2 polymorphs B and D

“…The phenomenon is relatively common for 3d 4 -3d 7 metal centres. 5 While many of the spin crossover complexes that have been studied are octahedral Fe(II) complexes with nitrogen [5][6][7][8][9][10] ligands, other examples include Fe(III) 4,[11][12][13][14] , Co(II) [15][16][17] and Ni(II) 18 . The change in electronic structure, as a result of the spin crossover, can result in changes in properties including molecular structure, colour and magnetism.…”

Reversible coordination-induced spin state switching in a nickel(ii) complex via a crystal-to-crystal transformation

“…24,25 To realize room-temperature manipulation of spin-state in molecules, Ni II -based coordination compounds distinguish themselves from the typical 3d 4 -3d 7 -based SCO systems. 26 In addition to the classical thermal-induced SCO, [27][28][29] a peculiar magnetic switch known as coordination-induced spin-state switching (CISSS) is bistable at room temperature in homogeneous solution [30][31][32][33][34] or solid state. [35][36][37][38][39] It is of general knowledge that the spin state of nickel(II) complexes depends on the coordination number and geometry, thus the square planar Ni-center diamagnetic low-spin state can be switched to a high spin state (S = 0 → S = 1) by controlling axial ligation to a square pyramidal or octahedral configuration.…”

Temperature and Pressure-driven Spin transitions and Piezochromism in a Mn-based Hybrid Perovskite

“…Although most of the studies on spin transitions have focused primarily on Fe-based metalorganic complexes, there exist as well some studies on Co [46,47,48], Mn [49,50,51,52,53], or Ni [54,55,56] based metal-organic compounds. Here, we consider a Mn-based hybrid perovskite.…”