Spin crossover versus low-spin behaviour exhibited in 2D and 3D supramolecular isomers of [Fe~(II)(2,4-bpt)_2]·guest

摘要

(Figure Presented) sTo spin or not to spin: Four supramolecular isomers based on a [Fe(2,4-bpt)_2].guest were synthesised by judicious choice of solvents under solvothermal conditions (see figure). They can be categorised into a 2D spin crossover (SCO) branch and a 3D low-spin (LS) branch (all of them exhibit NbO topology, but one is non-interpenetrated and the other two are two-fold interpenetrated). The differences in the supramolecular interactions play important roles in their magnetic behaviour.