Above room temperature spin transition in a metallo-supramolecular coordination oligomer/polymer

Abstract

By use of a metallo-supramolecular concept, a linear iron(II) coordination chain [Fe^II(L)]_n(BF₄)_2n (L = 1,4-bis(1,2′:6′,1″-bispyrazolylpyridin-4′-yl)benzene) was rationally designed and synthesized. The molecular chain shows a reversible spin transition at 323 K with a ca. 10 K wide hysteresis loop.